TM8000 3DK Hardware Developer’s Kit Application Manual TM8000/TM8100 TM8200 Developers Manual/TM8100 TM8100

User Manual: Pdf TM8000/TM8100-TM8200 3DK Hardware Developers Kit Application Manual/TM8100-TM8200 3DK Hardware Developers Kit Application Manual

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3DK Hardware Developer’s Kit Application Manual
Contents
Preface
1 Introduction
- 1.1 Overview
- 1.2 Serial Ports - Notice to all System Integrators
2 Description of the Radio Interfaces
3 Programmable I/O Lines
4 Creating Your Own Options Board
- 4.1 Internal Options Board
- 4.2 Blank Control Head Options Board
5 Connecting Third-Party Products
- 5.1 External Products
- 5.2 Internal Products
  - 5.2.1 Encryption Module (Scrambler)
  - 5.2.2 ANI Module
6 Connecting an External Alert Device
7 Computer-Controlled Radio
Tait General Software Licence Agreement

TM8100 mobiles

TM8200 mobiles

3DK Hardware Developer’s Kit

Application Manual

MMA-00011-01

Issue 1

March 2006

2TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

Contact Information

Tait Radio Communications

Corporate Head Office

Tait Electronics Ltd

P.O. Box 1645

Christchurch

New Zealand

For the address and telephone number of regional

offices, refer to the TaitWorld website:

Website: http://www.taitworld.com

Technical Support

For assistance with specific technical issues, contact

Technical Support:

E-mail: support@taitworld.com

Website: http://support.taitworld.com

All information contained in this manual is the property

This manual may not, in whole or in part, be copied,

photocopied, reproduced, translated, stored, or reduced

to any electronic medium or machine-readable form,

without prior written permission from Tait Electronics

Limited.

The word TAIT and the TAIT logo are trademarks of

Tait Electronics Limited.

All trade names referenced are the service mark,

trademark or registered trademark of the respective

manufacturers.

Disclaimer

There are no warranties extended or granted by this

manual. Tait Electronics Limited accepts no

responsibility for damage arising from use of the

information contained in the manual or of the

equipment and software it describes. It is the

responsibility of the user to ensure that use of such

information, equipment and software complies with the

laws, rules and regulations of the applicable

jurisdictions.

Enquiries and Comments

If you have any enquiries regarding this manual, or any

comments, suggestions and notifications of errors,

please contact Technical Support.

Updates of Manual and Equipment

In the interests of improving the performance, reliability

or servicing of the equipment, Tait Electronics Limited

reserves the right to update the equipment or this

manual or both without prior notice.

Intellectual Property Rights

This product may be protected by one or more patents

of Tait Electronics Limited together with their

international equivalents, pending patent applications

and registered trade marks: NZ338097, NZ508054,

NZ508340, NZ508806, NZ508807, NZ509242,

NZ509640, NZ509959, NZ510496, NZ511155,

NZ511421, NZ516280/519742, NZ519118,

NZ519344, NZ520650/537902, NZ521450,

NZ524509, NZ524537, NZ524630, NZ530819,

NZ534475, NZ534692, NZ535471, NZ536945,

NZ537434, NZ534369, NZ522236, NZ524378,

AU2003281447, AU2002235062, AU2004216984,

CA2439018, EU03784706.8, EU02701829.0,

EU04714053.8, GB23865476, GB2386010,

GB0516094.0, GB0516092.4, US09/847322, US60/

613748, US60/539617, US10/520827, US10/468740,

US5,745,840, US10/520827.

To Our European Customers

Tait Electronics Limited is an

environmentally responsible company

which supports waste minimization

and material recovery. The European

Union’s Waste Electrical and Electronic

Equipment Directive requires that this

product be disposed of separately from the general waste

stream when its service life is over. Please be

environmentally responsible and dispose through the

original supplier, your local municipal waste “separate

collection” service, or contact Tait Electronics Limited.

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual 3

Contents

Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Associated Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Publication Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Alert Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1.1 Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1.2 Serial Ports - Notice to all System Integrators. . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1.2.1 Serial Line Polarity in Tait Radios . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1.2.2 Line Lengths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1.2.3 RS232 Compatibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1.2.4 RS232 Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2 Description of the Radio Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.1 RF Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.2 Power Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.3 Auxiliary Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.4 Internal Options Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

2.5 Provision for External Options Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

2.6 Provision for Additional Connector (SMA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

2.7 Control Head Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

2.8 Microphone Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

2.9 Blank Control Head Programming Connector . . . . . . . . . . . . . . . . . . . . . . . . . . 36

2.10 RJ45 Control Head Programming Connector . . . . . . . . . . . . . . . . . . . . . . . . . . 37

3 Programmable I/O Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

3.1 Digital Input Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

3.1.1 Toggle Stand-by Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

3.1.2 Power Sense (Ignition) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

3.1.3 Enter Emergency Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

3.1.4 Send Channel Preset Call. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

3.1.5 Send Network Preset Call 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

3.1.6 External Call (ECR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

3.1.7 External PTT 1 and 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

3.1.8 Inhibit PTT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

3.1.9 Toggle Tx RF Inhibit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

3.1.10 Decrement Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

3.1.11 Increment Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

3.1.12 Home Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

3.1.13 BCD Pin 0 to 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

4TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

3.1.14 Preset Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

3.1.15 Mute External Audio Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

3.1.16 Mute Audio Output Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

3.1.17 Unmute Audio Output Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

3.1.18 Send Mic Audio to Spkr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

3.1.19 Force Audio PA On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

3.1.20 Force Audio PA Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

3.1.21 Simulate F1 to F4 Key. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

3.1.22 Toggle F1 to F4 Key LED. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

3.1.23 Toggle Alarm Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

3.1.24 Activate THSD Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

3.1.25 RTS Control (DCE). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

3.1.26 Lock Radio UI (PIN to unlock) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

3.2 Digital Output Lines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

3.2.1 Busy Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

3.2.2 Radio Has Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

3.2.3 Radio Transmission Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

3.2.4 Channel Locked Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

3.2.5 Reflected PTT Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

3.2.6 External Alert 1 and 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

3.2.7 Public Address Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

3.2.8 Reflected PTT Inhibit Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

3.2.9 Reflect THSD Modem Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

3.2.10 Signalling Audio Mute Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

3.2.11 Radio On Traffic Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

3.2.12 On Data Traffic Channel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

3.2.13 Monitor Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

3.2.14 Hookswitch Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

3.2.15 Call Setup Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

3.2.16 Radio Idle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

3.2.17 Control Status Rx (Line 1 to 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

3.2.18 SIBT Received . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

3.2.19 Radio Stunned . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

3.2.20 F1 to F4 Key Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

3.2.21 FFSK Data Received Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

3.2.22 CTS Control (DCE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

3.2.23 Ready For NPD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

3.2.24 Serial Data Tx In Progress . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

3.2.25 Radio Ready . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

3.3 Audio Tap In and Tap Out Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

4 Creating Your Own Options Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

4.1 Internal Options Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

4.1.1 Mechanical Envelope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

4.1.2 TM8000 Internal Options Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

4.1.3 Common Practices for Internal Options Board Design . . . . . . . . . . . 102

4.1.4 Guidelines for EMC Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

4.2 Blank Control Head Options Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual 5

5 Connecting Third-Party Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109

5.1 External Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

5.1.1 External Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

5.1.2 Audio Headset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

5.1.3 USB Adaptor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

5.2 Internal Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

5.2.1 Encryption Module (Scrambler) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

5.2.2 ANI Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

6 Connecting an External Alert Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . .129

6.1 Fitting Power MOSFET Q707 and Removing Resistor R768 . . . . . . . . . . . . . 130

6.2 Radio Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

6.3 Connecting the External Alert Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

7 Computer-Controlled Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .133

7.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

7.1.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

7.1.2 Benefits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

7.1.3 Configurable Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134

7.1.4 Potential Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134

7.2 Programmable Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134

7.2.1 Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134

7.3 Command Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

7.4 Command Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

7.4.1 Message Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

7.4.2 Calculating [CHECKSUM] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

7.5 CCR Mode Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

7.5.1 Entering CCR Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

7.5.2 CCR/CCDI Mode Independence . . . . . . . . . . . . . . . . . . . . . . . . . . 137

7.5.3 CCR Mode Activated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

7.5.4 CCR Mode Busy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

7.5.5 Blocked Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

7.5.6 CCR Persistence. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

7.5.7 CCR Response Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

7.6 CCR Positive Acknowledgements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

7.7 CCR Negative Acknowledgements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

7.7.1 Invalid CCR Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

7.7.2 Validation Checksum Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

7.7.3 Invalid Validation Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

7.7.4 Validation Parameter Error. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

7.7.5 Radio Busy Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

7.7.6 Command Not Accepted Message . . . . . . . . . . . . . . . . . . . . . . . . . . 140

7.8 CCR Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

7.8.1 Summary and Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

7.8.2 Go to Receive Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

7.8.3 Load Transmit Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143

7.8.4 Set Volume Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143

7.8.5 Receive CTCSS Value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

6TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

7.8.6 Transmit CTCSS Value. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

7.8.7 Receive DCS Value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

7.8.8 Transmit DCS Value. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

7.8.9 Encode Selcall Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

7.8.10 Set Selcall Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

7.8.11 Set ANI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

7.8.12 Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

7.8.13 Transmitter Output Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

7.8.14 Set Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

7.8.15 Query Radio Pulse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

7.8.16 Exit CCR Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

7.9 Unsolicited Messages from the Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152

7.9.1 Summary and Examples. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152

7.9.2 PTT exceeds max transmit limit. . . . . . . . . . . . . . . . . . . . . . . . . . . . 152

7.9.3 Selcall Decode Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

7.9.4 Notify Buffer Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

Tait General Software Licence Agreement . . . . . . . . . . . . . . . . . . . . . . . . . . . .155

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual 7

Preface

Scope of Manual

This manual contains a description of the radio interfaces and information

on how to integrate third-party products and create internal and control

head options boards for TM8100 and TM8200 radios.

Purchase of the 3DK Hardware Developer’s Kit entitles you to telephone

support from your regional Tait service organisation (for telephone numbers

refer to the TaitWorld website). Tait also offers the ability to log questions via

the internet using the Tait FOCUS call management system. Please contact

your local Tait service organisation for login details. The Tait FOCUS system

allows you to raise technical enquiries directly on Tait via the Internet and

view the progress of that issue through to resolution. This application allows

you to contribute to the issue resolution and also to upload and download any

required files to speed up the problem resolution process.

Disclaimer

Important Modifications to radio-frequency transmitting equipment

can void the user's authority to operate the equipment.

By distributing the TM8000 3DK Hardware Developer’s

Kit, Tait Electronics Limited. does not accept liability for

any non-compliance or infringement of intellectual

property rights resulting from the application or use of this

kit or information. Any person modifying Tait radio-

frequency transmitting equipment is responsible for

ensuring that the modified equipment meets all legal and

regulatory requirements in the country of use or supply.

Associated Documentation

The following associated documentation is available for this product:

■MMA-00002-xx

TM8100 User’s Guide

■MMA-00003-xx

TM8200 User’s Guide

■MMA-00028-xx TM8100/TM8200 Installation Guide

■MMA-00005-xx TM8100/TM8200 Service Manual

■MMA-00013-xx

TMAA30-02 TM8000 3DK Application Board

Service Manual

■MMA-00014-xx

TMAA30-02 TM8000 3DK Application Board

Software Manual

8TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

■

MMA-00038-

TM8100/TM8200 Computer-Controlled Data

Interface (CCDI) Protocol Manual

The characters xx represent the issue number of the documentation.

■Technical Note TN-1075-AN MAP27 Implementation Form

■Technical Note TN-1110 USB to Serial Adaptors

■Tecnical Note TN-1140 TM8000 Horn Alert Setup

Technical notes are published from time to time to describe applications for

Tait products, to provide technical details not included in manuals, and to

offer solutions for any problems that arise.1

Publication Record

Alert Notices

Within this manual, four types of alerts are given to the reader: warning,

caution, important, and note. The following paragraphs illustrate each type

of alert and its associated symbol.

Warning!! This alert is used when there is a potential risk of death

or serious injury.

Caution This alert is used when there is the risk of minor or moderate

injury to people.

Important This alert is used to warn about the risk of equipment

damage or malfunction.

Note This alert is used to highlight information that is required to ensure

that procedures are performed correctly.

1. Technical notes are available in PDF format from the Tait support website.

Consult your nearest Tait Dealer or Customer Service Organization for

more information.

Issue Publication Date Description

1 March 2006 1st release

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual 9

Abbreviations

Abbreviation Description

3DK Third-Party Developer’s Kit

AGND Analog Ground

ALC Automatic Level Control

ANI Automatic Number Identification

AUD Audio

AUX Auxiliary

BCD Binary-Coded Decimal

BIN Binary

BNC Bayonet Neill Concelman (RF connector)

CCDI Computer-Controlled Data Interface

CH Control Head

CMOS Complementary Metal Oxide Semiconductor

COM Communication (Port)

CTS Clear to Send

DGND Digital Ground

DSP Digital Signal Processor

DTE Data Terminal Equipment

EMC Electromagnetic Compatibility

ESD Electrostatic Discharge

ESR Equivalent Series Resistance

FFSK Fast Frequency Shift Keying

GND Ground

GPIO General Purpose Input/Output

GPS Global Positioning System

I/O Input/Output

IOP Internal Options Port

IPN Internal Part Number

LED Light-Emitting Diode

LK1…LK4 Hardware Link 1…4

LSB Least Significant Bit

MB Medium Band

MIC Microphone

N/A Not Applicable

NB Narrow Band

NMEA National Marine Electronics Association

OTAR Over-the-Air Rekeying

PA Power Amplifier

PCB Printed Circuit Board

PRG Program

PSU Power Supply Unit

PTT Press To Talk

10 TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

RF Radio Frequency

RSD Rated System Deviation

RSSI Received Signal Strength Indicator

RTS Request to Send

Rx Receive

RXD Receive Data

S/N Signal/Noise

SCADA Supervisory Control and Data Acquisition

SDM Short Data Message

SMD Surface-Mounted Device

SPK Speaker

THSD Tait High Speed Data

TTL Transistor-Transistor Logic

Tx Transmit

TXD Transmit Data

UART Universal Asynchronous Receiver/Transmitter

USB Universal Serial Bus

WB Wide Band

Abbreviation Description

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Introduction 11

1Introduction

1.1 Overview

This manual provides you with the information required to:

■interface to the radio and configure the programmable I/O lines:

■“Description of the Radio Interfaces” on page 13

■“Programmable I/O Lines” on page 39

■build your own options boards:

■“Creating Your Own Options Board” on page 97

■interface application devices:

■“Description of the Radio Interfaces” on page 13

■“Programmable I/O Lines” on page 39

■“Connecting Third-Party Products” on page 109

■connect an external alarm to the radio:

■“Connecting an External Alert Device” on page 129

■use Computer-Controlled Radio (CCR) commands to control a radio

unit from Data Terminal Equipment:

■“Computer-Controlled Radio” on page 133

Refer to the technical support website for the latest information on the

integration of application devices (refer to “Tait Radio Communications

Corporate Head Office” on page 2).

12 Introduction TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

1.2 Serial Ports - Notice to all System Integrators

1.2.1 Serial Line Polarity in Tait Radios

The serial lines in all Tait radios are negative logic.

This means that a logic high is 0V and a logic low is 3V3, which is the same

polarity as RS232, and is opposite to TTL/CMOS. No negative voltage is

provided on these lines.

1.2.2 Line Lengths

The voltage levels in Tait radios are low and have been designed to drive

limited cable lengths.

It is not recommended that a radio drive any line longer than 3.0m.

1.2.3 RS232 Compatibility

Although the serial port TXD line only changes from 0V to +3V3, it will

drive most modern RS232 receivers satisfactorily, providing the cable length

used is within the limit specified above.

The RXD input is capable of accepting signals up to the full RS232 levels.

1.2.4 RS232 Drivers

If full RS232 drive levels are required, or longer cable lengths are used, the

TMAA01-05 Options-Extender Board should be fitted to the radio.

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Description of the Radio Interfaces 13

2 Description of the Radio Interfaces

This chapter describes the characteristics of the mechanical and electrical

interfaces of the radio body and the various control heads that are suitable

for the connection of TM8100/TM8200 or application accessories and

equipment.

Figure 2.1 provides an overview of the radio interfaces:

Figure 2.2 shows the connectors of the radio body.

Figure 2.3 shows the connectors of the TM8115 two-digit display control

head. (The TM8110 one-digit display control head is the same as this,

except that the LED display is only one digit wide.)

Figure 2.4 shows the connectors of the TM8105 blank control head.

Figure 2.5 shows the connectors of the TM8255 graphical-display control

head.

Figure 2.6 shows the connectors of the TM8252 RJ45 control head.

For more block and circuit diagrams refer to the PCB information for your

radio.

Figure 2.1 Radio interfaces (with TM8115 control head)

Control Head

Speaker

Control-Head

Board

Speaker

Leads

Control-

Head

Loom

Speaker

Connector

Main Board

Radio Body

Internal

Options

Loom

Internal

Options

Board

Control-Head

Connector

External

Options

Connector

Iinternal

Options

Connector

Power

Connector

RF Connector

Auxiliary

Connector

Debug

Connector

(Factory Only)

Microphone

Connector

Volume

Control

Keys

LEDs

LCD

14 Description of the Radio Interfaces TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

Figure 2.2 Connectors of the radio body

powerauxiliary RF

control head

internal options

provision for

rear view

front view

connector

additional

connectorconnector

connector

provision for

external options

connector connector

top view

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Description of the Radio Interfaces 15

Figure 2.3 Connectors of the TM8115 two-digit display control head

Figure 2.4 Connectors of the TM8105 blank control head

microphone

to control head

front view

connector

rear view

connector

programming

to control head

front view

connector

rear view

16 Description of the Radio Interfaces TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

Figure 2.5 Connectors of the TM8200 graphical-display control head

Figure 2.6 Connectors of the TM8252 RJ45 control head

microphone

to control head

front view

connector

rear view

connector

to control head

front view

connector

rear view

programming

connector LED

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Description of the Radio Interfaces 17

2.1 RF Connector

The RF connector is the primary RF interface to the antenna. The RF

connector is either a standard BNC, or mini-UHF, or TNC socket with an

impedance of 50Ω.

Important The maximum RF input level is +27dBm. Higher levels

may damage the radio.

2.2 Power Connector

The power connector is the interface for the primary 13.8V power source

and the external speaker. The primary power source can be the vehicle

battery or a mains-fed DC power supply. The power connector provides

connection for an external speaker.

Warning!! Danger of Fire! The protection mechanisms in

Table 2.3 rely on the correct fuses in both the

negative and positive power supply leads being

present. Failure to fit the correct fuses may

result in fire or damage to the radio.

Table 2.1 RF connector - pins and signals

Pinout Pin Signal Name Signal Type

1 RF RF analog

2 GND RF ground

rear view

Table 2.2 Power connector - pins and signals

Pinout Pin Signal name Description Signal type

1 AGND Earth return for radio body

power source.

Ground

2 SPK– External speaker output.

Balanced load configuration.

Analog

3 SPK+ External speaker output.

Balanced load configuration.

Analog

4 13V8_BATT DC power input for radio body

and control head.

Power

external view

50W/40W

1 2 3 4

external view

25W

18 Description of the Radio Interfaces TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

Important The speaker load configuration is balanced; the speaker

output lines must not be connected to ground. Connecting

a speaker output line to ground will cause audio power

amplifier shutdown

Table 2.3 Power connector - power supply input characteristics

Parameter

Standard

Test method and conditions Comments

min. typ. max. units

Radio operating range12 9.7 17.2 V

Auto-recovery limits210.2 16.8 V After supply voltage excursion

outside the radio operating

range

Safe input range23 –0.5 30 V No hardware damage.

Reverse polarity

protection

Crowbar diode with in-line

fuse

Refer to the Service Manual

for details on replacing

fuses.

Cranking earth current

protection

In-line fuse with negative lead

1. While the transceiver will operate over this range RF performance to specification applies over 10.8 to 16.0V.

2. Outside the radio operating range the radio will shutdown. Auto recovery will occur if the supply voltage returns

to within the auto recovery limits specified. Depending on the power sense option selected, auto recovery may not

occur if supply voltage drops below 4V prior to returning to within the auto recovery limits.

3. Application of steady state voltage higher than 30V will cause the crowbar diode (D600) to fail short circuit and

in-line fuse to blow. The radio will survive transients above 30V within the 95/54/EC standard.

Table 2.4 Power connector - speaker output characteristics

Parameter

Standard

Test method and conditions Comments

min. typ. max. units

Load configuration Balanced

Load 3.2 Ω

Maximum power 10 W Into 4Ω.

Rated duty cycle 33 % 1min at maximum power:

2min Rx standby

Rated audio power 3 W Into 16Ω via external speaker

port.

Internal speaker is disconnected.

This is ‘rated audio power’ for

the purposes of all external

standards.

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Description of the Radio Interfaces 19

2.3 Auxiliary Connector

The auxiliary connector is the standard interface for external devices that are

typically connected to a radio. The auxiliary connector is a 15-way standard-

density D-range socket. The auxiliary connector provides a serial port, three

programmable input lines, four programmable digital I/O lines and audio

I/O.

Note The space for a mating plug is limited to 41mm in width and

18mm in height. Although most plugs will fit this space, it is rec-

ommended to test the plug to be used before manufacturing a

cable. The internal options kit (described on page 101) includes a

suitable plug (Tait IPN 240-00020-55).

If the auxiliary cable is longer than 1 metre it is recommended that the cable

and connector backshell be shielded. Figure 2.7 shows the recommended

shielding arrangement. The earth braid wire (bare copper) and aluminium

foil should only be earthed at the radio end of the cable.

The I/O lines can be programmed for a variety of functions, logic levels, and

in some cases, direction (refer to

“Programmable I/O Lines” on page 39

Audio lines can also be programmed to tap into, or out of, different points in

the audio processing chain (refer to

“Audio Tap In and Tap Out Lines” on

page 91

Figure 2.7 Recommended auxiliary cable and connector shielding

cable insulation

aluminium foil

earth braid wire

signal earth wire

analogue ground pin

metal backshell

metal D-range shroud in

contact with backshell

metal cable clamp

20 Description of the Radio Interfaces TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

Table 2.5 Auxiliary connector - pins and signals

Pinout Pin Signal name Description Signal type

12 AUX_GPI1 General purpose digital input.

Programmable function.

Digital, 3V3 CMOS

5 AUX_GPI2 General purpose digital input.

Programmable function.

With LK3 fitted, GPI2 is an

emergency power sense input.

Digital, 3V3 CMOS

4 AUX_GPI3 General purpose digital input.

Programmable function.

With LK2 fitted, GPI3 is a power

sense input.

Digital, 3V3 CMOS

10 AUX_GPIO4 Programmable function and

direction.

Pads available to fit a higher power

driver transistor on GPIO4 line.

Digital, 3V3 CMOS

input; open collector

output with pullup

2 AUX_GPIO5

9 AUX_GPIO6

1 AUX_GPIO7

11 AUX_TXD Asynchronous serial port -

Transmit data

Digital, 3V3 CMOS

3 AUX_RXD Asynchronous serial port -

Receive data

Digital, 3V3 CMOS

7 AUD_TAP_IN Programmable tap point into the Rx

or Tx audio chain. DC-coupled.

Analog

13 AUD_TAP_OUT Programmable tap point out of the

Rx or Tx audio chain. DC-coupled.

Analog

14 AUX_MIC_AUD Auxiliary microphone input.

Electret microphone biasing

provided. Dynamic microphones are

not supported.

Analog

6 RSSI Analog RSSI output. Analog

8 +13V8_SW

Switched 13.8V supply. Supply is

switched off when radio body is

switched off.

Power

15 AGND Analog ground Ground

1. For more information on hardware links refer to the Service Manual.

2. For more information on high power drive refer to “Special Purpose Outputs” on page 73.

3. Can be switched or unswitched. For more information refer to the Service Manual.

rear view

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Description of the Radio Interfaces 21

Table 2.6 Auxiliary connector - DC characteristics

Parameter

Standard

Test method and conditions Comments

min. typ. max. units

Digital signals

Input low level:

All inputs

AUX_GPI2

0.7

Vs–4

No hardware links fitted1.

LK3 fitted.

Includes AUX_GPI3 with LK1/2 fitted.

Configured as emergency power sense

input.

Input high level:

All inputs

AUX_GPI2

AUX_GPI3

1.7

Vs–1.5

2.6

No hardware links fitted1.

LK3 fitted.

LK1 and/or 2 fitted.

Configured as emergency power sense

input.

Configured as power sense input.

Input low current:

All other inputs

AUX_GPI2

AUX_GPI3

AUX_RXD

–100 –120

–132

–500

–1

µA

No links fitted1. Default pullups3.

LK3 fitted. Vs=13.8V

LK1 and 2 fitted.

–8V input.

Default pullup resistance is 33kΩ.

Configured as emerg. power sense input.

Configured as power sense input.

Input high current:

AUX_RXD

All other inputs

100

µA

No links fitted1. Default pullups3.

+8V input.

3.3V input.

5V input.

Default pullup resistance is 33kΩ.

Output low level:

AUX_GPIO4-7

AUX_TXD

600

200

100µA sink current.

10mA sink current.

100µA sink current.

Current limit occurs at 20mA typ.

Output high level:

AUX_GPIO4-7

AUX_TXD

3.1

2.4

No load. Default pullups3.

3kΩ load.

Safe DC input limits:

AUX_GPI1-3

AUX_GPIO4-7

AUX_RXD

AUX_TXD4

–0.5

–25V

–10

Vs+0.5

Input current must not exceed ±50mA.

This is the rating of the clamping

diodes.

Analog signals

DC output range:

RSSI

13V8_SW

9.7

17.2

See Table 2.9 on page 23.

Follows Vs. Output switches off outside this range.

DC bias:

AUD_TAP_IN

AUD_TAP_OUT

AUX_MIC_AUD

1.4

2.1

2.9

1.5

2.3

3.0

1.6

2.5

3.1

No load. Zero Rx frequency error.

Via 2.2kΩ. Bias for electret microphone.

Input impedance:

AUD_TAP_IN

AUX_MIC_AUD

2.1

100

2.2

150

2.3

kΩ

DC to 10kHz

Output impedance:

AUD_TAP_OUT

RSSI

590

950

600

1000

650

1050

Ω

DC to 10kHz

Safe DC input limits:

AUD_TAP_IN

AUD_TAP_OUT4

AUX_MIC_AUD

RSSI4

–17

–0.5

–17

+17

Short circuit-safe. Input current <

20mA

Output load:

13V8_SW (switched)

13V8_SW (unswitched)

Continuous load

Peak for <1sec

Continuous load

Peak for <1sec

Specification must be derated by the

load amount drawn from the control

head and internal options interfaces

1. For more information on hardware links refer to the service manual.

2. It is recommended that this input is driven by a mechanical switch or an open collector/drain output.

22 Description of the Radio Interfaces TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

3. For more information on pullups refer to “Digital Input Lines” on page 39.

4. These outputs are protected against accidental input to the limits specified.

Table 2.7 Auxiliary connector - AC characteristics

Parameter

Standard Test method and

conditions Comments

min. typ.

max.

units

AUD_TAP_IN (refer to note 4)

Nominal input level:

Tap T3, T4, T5, T8, T9, T12

Tap T13

Tap R7, R10

0.62

0.78

0.62

0.69

0.87

0.69

0.76

0.96

0.76

Vp-p

Level for 60% RSD@1kHz.

Level for 3kHz dev.@1kHz.

Refer to note 3.

Equivalent to –10dBm into

600Ω.

Full scale input level 2.0 Vp-p

Frequency response:

All tap-points

Refer to the plots in

Table 2.10 and Table 2.11.

Group delay - absolute:

Tap T13

Tap T12

Tap T9

Tap T8

Tap T5

Tap T4

Tap T3

1.8

6.6

9.6

11.6

11.7

At 1kHz. Refer to note 2.

Refer to note 1.

Group delay - distortion:

Tap T12 and Tap T13

Refer to the plots in

Table 2.12.

AUD_TAP_OUT

Nominal output level:

All Rx tap-points except R1

Tap R1

Tap T3

0.62

0.54

0.62

0.69

0.60

0.69

0.76

0.66

0.76

Vp-p

Rload=600Ω.

Level at 60% RSD@1 kHz.

Level at 3kHz dev.@1kHz

Refer to “Microphone

sensitivity”of AUX_MIC_AUD.

Equivalent to –10dBm into

600Ω.

Full scale output level 2.0 Vp-p Rload=600Ω.

Frequency response:

All tap-points

Refer to the plots in

Table 2.10 and Table 2.11.

Group delay - absolute:

Tap R1

Tap R2

Tap R4

Tap R5

Tap R7

Tap R10

1.8

6.6

6.7

8.5

8.7

At 1kHz. Refer to note 2.

Refer to note 1.

Group delay - distortion:

Tap R1 and Tap R2

Refer to the plots in

Table 2.12.

AUX_MIC_AUD

Rated System Deviation

–2.5

–4.0

–5.0

+2.5

+4.0

+5.0

kHz

EIA-603B

Units are peak frequency

deviation from nominal

carrier frequency in kHz.

Modulation frequency

response

Refer to the plot in

Table 2.13.

EIA-603B

Microphone sensitivity 6.0 7.5 9.0 mV

rms

EIA-603B

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Description of the Radio Interfaces 23

Table 2.7 Notes:

1. Optional processing blocks are bypassed in the above specification.

2. For AUD_TAP_IN and AUD_TAP_OUT specifications the following signal paths apply:

3. For tap into the Rx path, nominal level refers to the level required to give output at RX_AUD that is same as the

60% dev level from the receiver. The level specified applies at 1kHz only.

4. AUD_TAP_IN uses a DC-coupled analog-to-digital converter and the bias voltage specified in Table 2.6 should be

used to maximise dynamic range. The DC bias is removed internally by a digital high-pass filter so the Tx carrier

frequency will not be affected by any bias error. it is recommended to use external AC-coupling for applications

which do not require modulation to very low frequencies.

Case Input Output

Tap into Rx chain AUD_TAP_IN RX_AUD

Tap out of Rx chain Modulation at antenna AUD_TAP_OUT

Tap into Tx chain AUD_TAP_IN Modulation at antenna

Tap out of Tx chain AUX_MIC_AUD AUD_TAP_OUT

Table 2.8 Auxiliary connector - data characteristics

Parameter

Standard

Test method and conditions Comments

min. typ. max. units

Serial port

Baud rate: 1200, 2400, 4800,

9600, 14400, 19200,

28800

bit/s All UART parameters are fixed

and common to all UARTs

except for the baud rate

which is configurable and

different for different modes/

applications

Data bits: 8

Start bit: 1

Stop bit: 1

Parity: None

Protocol: CCDI3

Flow control:

Software XON/XOFF

GPIO

Delays:

I/O mirror to IOP

UI key delay

500

µs

Table 2.9 RSSI voltage vs. signal strength

24 Description of the Radio Interfaces TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

Note Audio response output is based on testing at 60% deviation.

Table 2.10 Rx path tap frequency response plots

dB (ref 1kHz, 60% dev)

-3

-6

-9

-12

-15

-18

-21

-24

-27

-30

1Frequency (Hz)

10 100 1000 10000

Tap out R1

Narrow band

Medium band

Wide band

dB (ref 1kHz, 60% dev)

-3

-6

-9

-12

-15

-18

-21

-24

-27

-30

1Frequency (Hz)

10 100 1000 10000

Tap out R2

Wide band

Medium band

Narrow band

dB (ref 1kHz, 60% dev)

-3

-6

-9

-12

-15

-18

-21

-24

-27

-30

Tap out R4

1Frequency (Hz)

10 100 1000 10000

dB (ref 1kHz, 60% dev)

-3

-6

-9

-12

-15

-18

-21

-24

-27

-30

Tap out R5

10 100 1000 10000

Frequency (Hz)

CTCSS off

CTCSS on

dB (ref 1kHz, 60% dev)

-3

-6

-9

-12

-15

-18

-21

-24

-27

-30

10 100 1000 10000

Frequency (Hz)

CTCSS off

CTCSS on

Tap out R7

10 100 1000 10000

Frequency (Hz)

dB (ref 1kHz, 60% dev)

-3

-6

-9

-12

-15

-18

-21

-24

-27

-30

CTCSS off

CTCSS on

Tap out R10

10 100 1000 10000

Frequency (Hz)

-3

-6

-9

-12

-15

-18

-21

-24

-27

-30

Tap in R7

dB (ref 1kHz)

10 100 1000 10000

Frequency (Hz)

Tap in R10

-3

-6

-9

-12

-15

-18

-21

-24

-27

-30

dB (ref 1kHz)

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Description of the Radio Interfaces 25

Table 2.11 Tx path tap frequency response plots

dB (ref 1kHz, 60% dev)

Tap in T13

-3

-6

-9

-12

-15

-18

-21

-24

-27

-30

1Frequency (Hz)

10 100 1000 10000

dB (ref 1kHz, 60% dev)

-3

-6

-9

-12

-15

-18

-21

-24

-27

-30

Tap in T12

1Frequency (Hz)

10 100 1000 10000

dB (ref 1kHz, 60% dev)

-3

-6

-9

-12

-15

-18

-21

-24

-27

-30

Tap in T8

1Frequency (Hz)

10 100 1000 10000

Tap in T9

dB (ref 1kHz, 60% dev)

-3

-6

-9

-12

-15

-18

-21

-24

-27

-30

Tap in T8

1Frequency (Hz)

10 100 1000 10000

dB (ref 1kHz, 30% dev)

-3

-6

-9

-12

-15

-18

-21

-24

-27

-30

10 100 1000 10000

Frequency (Hz)

Tap in T5 (sub-limiting)

10 100 1000 10000

Frequency (Hz)

Tap in T5 (limiting)

dB (ref 1kHz, 120% dev)

-3

-6

-9

-12

-15

-18

-21

-24

-27

-30

Tap in T4 (sub-limiting)

dB (ref 1kHz, 30% dev)

10 100 1000 10000

Frequency (Hz)

-3

-6

-9

-12

-15

-18

-21

-24

-27

-30

Tap in T4 (limiting)

dB (ref 1kHz, 120% dev)

-3

-6

-9

-12

-15

-18

-21

-24

-27

-30

10 100 1000 10000

Frequency (Hz)

26 Description of the Radio Interfaces TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

Table 2.11 Tx path tap frequency response plots (Continued)

10 100 1000 10000

Frequency (Hz)

dB (ref 1kHz, 30% dev)

Tap in T3 (sub-limiting)

-3

-6

-9

-12

-15

-18

-21

-24

-27

-30

dB (ref 1kHz, 120% dev)

10 100 1000 10000

Frequency (Hz)

Tap in T3 (limiting)

-3

-6

-9

-12

-15

-18

-21

-24

-27

-30

-3

-6

-9

-12

-15

-18

-21

-24

-27

-30

Tap out T3

10 100 1000 10000

Frequency (Hz)

dB (ref 1kHz)

-3

-6

-9

-12

-15

-18

-21

-24

-27

-30

Tap out T4

10 100 1000 10000

Frequency (Hz)

dB (ref 1kHz)

Table 2.12 Group delay distortion frequency response plots

10 Frequency (Hz)

1 100 1000 10000

100

-20

-40

-60

-80

-100

Group delay distortion ( s)µ

Tap in R1 or R2

Narrow band

Medium band

Wide band

Tap in T12 or T13

10 Frequency (Hz)

Group delay distortion ( s)µ

1 100 1000 10000

500

450

400

350

300

250

200

150

100

-50

-100

-150

-200

-250

-300

-350

-400

-450

-500

Table 2.13 AUX_MIC_AUD frequency response plot

dB (ref 1kHz, 60% dev)

-3

-6

-9

-12

-15

-18

-21

-24

-27

-30

AUX_MIC_AUD

10 100 1000 10000

Frequency (Hz)

No CTCSS

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Description of the Radio Interfaces 27

2.4 Internal Options Connector

When installing an internal options board, the internal options connector is

the electrical interface to the main board of the radio body.

The internal options connector provides similar I/O to the auxiliary

connector. The digital signals and the serial port are independent of the

auxiliary connector signals, but the AUD_TAP_IN, AUD_TAP_OUT,

AUX_MIC_AUD, and RSSI signals are shared with the auxiliary connector.

The internal options connector is an 18-pin 0.1in pitch Micro-MaTch

connector.

Examples of internal options boards:

■TMAA30-02 3DK Application Board.

Refer to the TM8000 3DK Application Board Service Manual.

■TMAA01-01 Line-Interface Board.

Refer to the TM8100/TM8200 Service Manual.

■TMAA01-05 Options Extender Board.

Refer to the TM8100/TM8200 Service Manual.

For information on how to create your own internal options board, refer to

“Internal Options Board” on page 97.

Table 2.14 Internal options connector - pins and signals

Pinout Pin Signal Description Signal type

1 13V8_SW

Switched 13V8 supply. Supply is switched

off when the Radio Body is switched off.

Power

2 AUD_TAP_OUT Programmable tap point out of the Rx or

Tx audio chain. DC-coupled.

Analog

3 AGND Analog ground. Ground

4 AUX_MIC_AUD Auxiliary microphone input.

Electret microphone biasing provided.

Dynamic microphones are not supported.

Analog

5 RX_BEEP_IN Receive sidetone input. AC-coupled. Analog

6 AUD_TAP_IN Programmable tap point into the Rx or Tx

audio chain. DC-coupled.

Analog

7 RX_AUD Receive audio output. Post volume

control. AC-coupled.

Analog

8 RSSI Analog RSSI output. Analog

9…15 IOP_GPIO1…7 Programmable function and direction.

With LK4 fitted, GPIO7 is a power sense

input

Digital.

3V3 CMOS

16 DGND Digital ground. Ground

17 IOP_RXD Asynchronous serial port - Receive data. Digital.

3V3 CMOS

18 IOP_TXD Asynchronous serial port - Transmit data. Digital.

3V3 CMOS

1. Can be switched or unswitched. For more information refer to the service manual.

2. For more information on hardware links refer to the service manual.

top view

28 Description of the Radio Interfaces TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

Important The digital I/O signals are intended to interface directly

with compatible logic signals only. Do not connect these

signals to external devices without appropriate signal con-

ditioning and ESD protection.

Table 2.15 Internal options connector - DC characteristics

Parameter

Standard

Test method and conditions Comments

min. typ. max. units

Digital signals

Input low level:

All inputs 0.7 V No hardware links fitted1. Also applies to IOP_GPIO7 with

LK4 fitted.

Input high level:

All inputs

IOP_GPIO7

1.7

2.8

No hardware links fitted.

LK4 fitted1. Configured as power sense input.

Input low current:

All inputs –100 –120 µA No hardware links fitted1. Also applies to IOP_GPIO7 with

LK4 fitted.

Input high current:

All inputs

IOP_GPIO7

1500

250

µA

3.3V input.

5V input.

3.3V input. LK4 fitted1. Configured as power sense input.

Output low level:

All outputs 120 mV 100µA sink current. 1kΩ series R on all outputs.

Output high level:

All outputs 3.1 V 100µA source current. 1kΩ series R on all outputs.

Safe DC input limits:

All inputs/outputs –0.5 +5.5 V

Input current must not exceed

±10mA.

Analog signals (for signals not listed here refer to the auxiliary connector specification)

Safe DC input limits:

RX_AUD

RX_BEEP_IN

–17

+17

Output load:

13V8_SW (switched)

13V8_SW (unswitched)

Continuous load

Peak for <1sec

Continuous load

Peak for <1sec

Specification must be derated by

the load amount drawn from the

control head and auxiliary

interfaces. See Service Manual.

1. For more information on hardware links refer to the service manual.

Table 2.16 Internal options connector - AC characteristics

Parameter

Standard

Test method and conditions Comments

min. typ. max. units

RX_BEEP_IN

Nominal input level 0.76 Vp-p For 6.2Vp-p at speaker @1kHz. Level for 10dB below rated

power.

Full scale input level 2.5 Vp-p For onset of clipping at 13.8V.

Frequency response 0.3 to 3kHz –3dB with respect to level at 1kHz.

Input impedance 1 kΩDC–10kHz

RX_AUD

Nominal output level 1.0 Vp-p At 1kHz, 60% dev. Full volume

Full scale output level: 2.0 Vp-p At 1kHz, 120% dev. Full volume

Output impedance: 100 ΩAt 1kHz.

Frequency response: Refer to plot in Table 2.18.

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Description of the Radio Interfaces 29

Table 2.17 Internal options connector - data characteristics

Parameter

Standard

Test method and conditions Comments

min. typ. max. units

Serial port

Baud rate: 1200, 2400, 4800,

9600, 14400, 19200,

28800

bit/s All UART parameters are

fixed and common to all

UARTs except for the baud

rate which is configurable

and different for different

modes/applications

Data bits: 8

Start bit: 1

Stop bit: 1

Parity: None

Protocol: CCDI3

Flow control:

Software XON/XOFF

GPIO

Delays:

I/O mirror to AUX

UI key delay

500

µs

Table 2.18 RX_AUD frequency response plot

dB (ref 1kHz, 60% dev)

-3

-6

-9

-12

-15

-18

-21

-24

-27

-30

10 100 1000 10000

Frequency (Hz)

CTCSS off

CTCSS on

RX_AUD

30 Description of the Radio Interfaces TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

2.5 Provision for External Options Connector

The radio has a mechanical interface for the external connector of an

internal options board. This external options connector can be a 9-way

standard-density or 15-way high-density D-range connector. If no internal

options board is installed (standard configuration), the hole for the external

options connector is sealed by a bung.

Examples of internal options boards:

■TMAA30-02 3DK Application Board.

Refer to the TM8000 3DK Application Board Service Manual.

■TMAA01-01 Line-Interface Board.

Refer to the TM8100/TM8200 Service Manual.

■TMAA01-05 Options Extender Board.

Refer to the TM8100/TM8200 Service Manual.

For information on how to create your own internal options board, refer to

“Internal Options Board” on page 97.

2.6 Provision for Additional Connector (SMA)

The radio has a provision to fit an additional round connector or cable exit

next to the external options connector on the rear of the radio. The position

is indicated in Figure 2.2 on page 14. The maximum hole diameter is

7.5mm, suitable for an SMA connector or a cable grommet.

Important When fitting an additional connector, it is the integrator’s

sole responsibility to provide adequate sealing.

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Description of the Radio Interfaces 31

2.7 Control Head Connector

The control head connector is the standard interface between the radio body

and the TM8100 and TM8200 control heads.

You can integrate your own options board into the cavity between the radio

body and the TM8105 blank control head. For information on how to

create your own blank control head options board, refer to “Blank Control

Head Options Board” on page 107.

The one-digit, two-digit, RJ45, and graphical-display control heads use all

18 signals of the control head connector, whilst the programming connector

of the blank control head only uses the signals 1 to 9.

Table 2.19 Control head connector - pins and signals

Pinout Pin Signal Description Signal type

1 RX_AUD Receive audio output. Post volume

control. AC-coupled.

Analog

2 +13V8

Power supply output from radio body

power source.

Power

3 CH_TXD Asynchronous serial port -

Transmit data.

Digital. 3V3 CMOS.

4 CH_PTT PTT input from microphone. Also carries

the hookswitch signal.

Digital

5 CH_MIC_AUD Fist microphone audio input. Analog

6 AGND Analog ground. Ground

7 CH_RXD Asynchronous serial port - Receive data. Digital. 3V3 CMOS.

8 DGND Digital ground. Ground

9 CH_ON_OFF Hardware power on/software-controlled

power off input. Active low.

Digital

10 VOL_WIP_DC DC signal from volume pot wiper. Analog

11 CH_SPI_DO Data output signal to control head. Digital. 3V3 CMOS.

12 CH_LE Latch enable output to control head. Digital. 3V3 CMOS.

13 CH_GPIO1 General purpose digital input/output. Digital. 3V3 CMOS

input. Open collector

output with pullup.

14 +3V3 Power supply to control head digital

circuits.

Power

15 CH_SPI_DI Data input from control head. Digital. 3V3 CMOS.

16 CH_SPI_CLK Clock output to control head. Digital. 3V3 CMOS.

17 SPK–Speaker audio output for non-remote

control head. Balanced load

configuration.

Analog

18 SPK+ Speaker audio output for non-remote

control head. Balanced load

configuration.

Analog

1. Can be switched or unswitched. For more information refer to the service manual.

CEGI1)1@1$1^1*

BDFHJ1!1#1%1&

front view

32 Description of the Radio Interfaces TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

Table 2.20 Control head connector - DC characteristics

Parameter

Standard Test method and

conditions Comments

min. typ. max. units

Digital signals

Input low level:

CH_SPI_DI

CH_RXD

CH_GPIO1

CH_PTT

CH_ON_OFF

0.7

Vs–4

Input high level:

CH_SPI_DI

CH_RXD

CH_GPIO1

CH_PTT

CH_ON_OFF

1.7

Vs–1.5

Input low current:

CH_SPI_DI

CH_RXD

CH_GPIO1

CH_PTT

CH_ON_OFF

–1

–120

–800

–13

µA

Vin=–8V

Vs=13.8V

Input high current:

CH_SPI_DI

CH_RXD

CH_GPIO1

CH_PTT

CH_ON_OFF

µA

Vin=3.3V

Vin=8V

Vin=3.3V

Vin=Vs

Output low level:

All outputs except

CH_GPIO1

200

600

100µA sink current

10mA sink current Current limit occurs at 20mA typ.

Output high level:

All outputs except

CH_TXD

CH_GPIO1

3.1

2.4

3.1

100µA source current

3kΩ load

No load 33kΩ pullup to 3.3V.

Hookswitch resistance:

CH_PTT 5.6 13.2 kΩMicrophone on hook resistance.

Safe DC input limits:

CH_SPI_X

CH_LE

CH_TXD

CH_RXD

CH_GPIO1

CH_PTT

CH_ON_OFF

–0.5

–10

–25

–0.5

–17

–0.5

+4.1

Vs+0.5

+17

Vs+0.5

Iin must not exceed ±10mA.

Iin must not exceed +50/–10mA.

Iin must not exceed +50mA.

Iin must not exceed ±50mA.

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Description of the Radio Interfaces 33

Analog signals (for signals not listed here refer to the Auxiliary interface specification)

DC input range:

VOL_WIP_DC 0

1.2

kΩ

Voltage/resistance for min/

max volume respectively.

This line is used for control head

detection. An open-circuit input

is considered as no head fitted.

DC bias:

SPK+/–

CH_MIC_AUD 2.9

0.5Vs

3.1

Audio PA on.

Via 2.2kΩBias for electret microphone.

Input resistance:

CH_MIC_AUD 2.1 2.2 2.3 kΩ

Output resistance:

SPK+/–0.5 ΩAudio PA on.

Output load:

+3V3

+13V8 (switched)

+13V8 (unswitched)

100

Continuous load

Peak for <1sec

Continuous load

Peak for <1sec

Specification must be derated by

load amount from internal

options and auxiliary interfaces.

See Service Manual.1

Safe DC input limits:

VOL_WIP_DC

RX_AUD

SPK+/–

CH_MIC_AUD

–17

–10

–0.5

+17

Short circuit-safe.

With TM811x head connected,

max input via mic interface is

Vs+0.5V.

1. The TM8255 graphical-display control head can draw 1A continuous load.

Table 2.20 Control head connector - DC characteristics (Continued)

Parameter

Standard Test method and

conditions Comments

min. typ. max. units

Table 2.21 Control head connector - AC characteristics

Parameter

Standard

Test method and conditions Comments

min. typ. max. units

RX_AUD refer to Table 2.16

CH_MIC_AUD refer to AUX_MIC_AUD in

Table 2.7

SPK+/–refer to Table 2.22

34 Description of the Radio Interfaces TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

Table 2.22 Control head connector - speaker output characteristics

Parameter

Standard

Test method and conditions Comments

min. typ. max. units

Mute ratio 70 75 dB With respect to maximum

output power. Noise measured in

0.3-3kHz bandwidth.

Signal path muted. Audio PA

on.

Receive audio

frequency response

Refer to plot in Table 2.24. EIA-603B

Internal speaker output:

Load configuration Balanced

Load 12.8 16 19.2 ΩAt 1kHz.

Maximum power 3 W Into 16Ω.

Rated duty cycle 100 % At maximum power.

Concurrent speaker

output:

Rated duty cycle 33 % 1min at maximum power

2min Rx standby

The internal and external

speaker loads are connected

in parallel (not switched).

Table 2.23 Control head connector - data characteristics

Parameter

Standard

Test method and conditions Comments

min. typ. max. units

Serial port

Baud rate: 1200, 2400, 4800,

9600, 14400,

19200,28800

bit/s All UART parameters are fixed

and common to all UARTs

except for the baud rate

which is configurable and

different for different modes/

applications

Data bits: 8

Start bit: 1

Stop bit: 1

Parity: None

Protocol: RPI

CCDI3

Flow control:

Software XON/XOFF

GPIO

Delays:

I/O mirror to IOP

UI key delay

500

µs

Table 2.24 Speaker frequency response plot

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Description of the Radio Interfaces 35

Detection of

Control Head The radios detect the presence or absence of a control head and

automatically configure the default receive audio volume accordingly. If a

control head with a user interface is connected, either in local or remote

configuration, then the volume potentiometer setting will determine

receive audio level. If a blank control head is connected, or no control head

is used at all, then the receive audio level will default to the programmed

Minimum Volume Level

For operation with the TM8105 blank control head or TM8252 RJ45

control head, the radio must be programmed always to power up when

power is applied and the ignition-sense hardware link LK1 must be fitted.

For more information on hardware links refer to the service manual.

2.8 Microphone Connector

The microphone connector of the control heads with user interface is an

RJ-45 socket.

When one of these control heads is connected to the control head connector

of the radio body using the loom provided, the microphone connector uses

the following eight control head connector signals:

For characteristics refer to the corresponding signals of the control head

connector.

Note THSD cannot be used with the Microphone port on TM8200

radios. The microphone port is not available when sending or

receiving THSD. If you intend to send and receive high speed

data (the Wideband Modem Enabled check box is selected), select

either Aux or Internal Options in this field.

Table 2.25 Microphone connector - pins and signals

Pinout Pin Signal name Description Signal type

1 MIC_RX_AUD Receive audio output. Analog

2 +13V8

Power supply output. Switched off

when radio body is switched off.

Power

3 MIC_TXD Asynchronous serial port -

Transmit data.

3.3V CMOS

4 MIC_PTT PTT input from microphone.

Also carries hookswitch signal.

Digital

5 MIC_AUD Fist microphone audio input. Analog

6 AGND Analog ground. Analog ground

7 MIC_RXD Asynchronous serial port -

Receive data.

3.3V CMOS

8 MIC_GPIO1 General purpose digital input/

output.

Open collector out

3.3V CMOS in

1. Can be switched or unswitched. For more information refer to the service manual.

front view

36 Description of the Radio Interfaces TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

2.9 Blank Control Head Programming Connector

The programming connector of the blank control head is a 9-way standard-

density D-range plug.

This connector can also be used to connect application products, and for

other purposes, as required.

When the blank control head is connected to the radio body, the

programming connector uses the signals shown in Table 2.26:

For characteristics refer to the corresponding signals of the control head

connector.

Table 2.26 TM8105 Programming connector - pins and signals

Pinout Pin Signal name Description Signal type

1 PRG_RX_AUD Receive audio output. Analog

2 PRG_TXD Asynchronous serial port -

Transmit data.

3.3V CMOS

3 PRG_MIC_AUD Fist microphone audio input. Analog

4 PRG_RXD Asynchronous serial port -

Receive data.

3.3V CMOS

5 PRG_ON_OFF Hardware power on/software-power

off input. Active low.

Digital

6 +13V8

Power supply output. Switched off

when radio body is switched off.

Power

7 PRG_PTT PTT input from microphone.

Also carries hookswitch signal.

Digital

8 AGND Analog ground Ground

9 DGND Digital ground Ground

1. Can be switched or unswitched. For more information refer to the Service Manual.

front view

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Description of the Radio Interfaces 37

2.10 RJ45 Control Head Programming Connector

The RJ45 control head has an RJ45 socket for programming (or other

purposes, as required), and a power on/off LED.

Note The pins of the programming connector is connected in parallel,

so care needs to be taken when connecting external devices to this

connector.

Table 2.27 RJ45 Programming connector - pins and signals

Pinout Pin Signal name Description Signal type

1 RX_AUD Receive audio output (after volume

control

Analog

2 +13.8V Unswitched 13.8 V power supply Power

3 TXD Asynchronous serial port - transmit

data

3.3V CMOS

4 PTT PTT input Digital

5 MIC_AUD Microphone audio input Analog

6 AGND Analog ground Ground

7 RXD Asynchronous serial port - receive

data

3.3V CMOS

8 ON/OFF Hardware power on/software power

off

Digital

front view

38 Description of the Radio Interfaces TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Programmable I/O Lines 39

3 Programmable I/O Lines

This chapter describes the programmable

■digital input lines

■digital output lines

■audio tap out lines

■audio tap in lines

These input and output lines can be configured using the Programmable

I/O form of the programming application. When configuring an input line,

the Mirrored To column can be used to reflect an input to an output line.

For more information refer to the online help of the programming

application.

The connectors and electrical characteristics of the programmable I/O lines

are described in “Description of the Radio Interfaces” on page 13.

3.1 Digital Input Lines

This section describes the general design principles for use of the

programmable I/O lines configured as inputs, and the input signals that can

be set for them.

Available Input

Lines The following lines are available to be used as inputs:

For details on the connector pin-outs and electrical characteristics of these

lines refer to “Description of the Radio Interfaces” on page 13.

Table 3.1 Digital input lines

Signals Connector Direction

AUX_GPI1…3 auxiliary connector input only

AUX_GPIO4…7 auxiliary connector input or output

IOP_GPIO1…7 internal options connector input or output

CH_GPIO1

MIC_GPIO11

PRG_GPIO11

1. CH_GPIO1 of the control head connector is the same signal as MIC_GPIO1 of the

microphone connector (control heads with user interface) and PRG_GPIO1 of the pro-

gramming connector (blank control head).

control head connector

microphone connector

programming connector

input or output

40 Programmable I/O Lines TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

Compatibility and

Tol erance Table 3.2 describes the compatibility of the input lines with common

industry logic standards:

Input Philosophy The digital inputs are designed to simplify the interfacing to a wide range of

signal sources, broadly encompassing directly wired switches, open-collector

transistors, opto-isolators, digital logic, and direct microprocessor drive.

In many cases, the amount of interfacing circuitry can be kept to a

minimum, thus reducing design effort and keeping down both cost and

circuit board area.

Input Circuitry Figure 3.1 shows a simplified circuit diagram of the digital input lines

(ESD protection not shown). For full circuit diagrams, refer to the PCB

Information chapter of the service manual for your radio, or to the technical

support website.

The input lines of the auxiliary connector and the control head connector

are protected against both over-voltage and under-voltage drive via the

clipping diodes and 47kΩ current-limiting resistor. The input lines of the

internal options connector are only protected against minor over-voltage

conditions (refer to “Internal Options Connector” on page 27).

Table 3.2 Digital input lines - compatibility and tolerance

Input line

Logic standard input compatibility and tolerance

3.3V CMOS 5V CMOS 5V TTL RS-232

AUX_GPI1 Yes Yes Yes No1

1. Level compatible but not tolerant. Inputs can be made RS-232-tolerant by using

3.3kΩ series resistance inserted at the radio end.

AUX_GPI22

2. Hardware link LK3 not fitted.

Yes Yes Yes No1

AUX_GPI33

3. Hardware link LK2 not fitted.

Yes Yes Yes No1

AUX_GPIO4…7 Yes Yes Yes No1

AUX_RXD Yes Yes Yes Yes

IOP_GPIO1…7 Yes Yes Yes No1

IOP_RXD Yes Yes Yes No1

CH_RXD

MIC_RXD

PRG_RXD

Yes Yes Yes Yes

CH_GPIO1

MIC_GPIO1

Yes Yes Yes No1

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Programmable I/O Lines 41

Pullup Resistors Pullup resistors are provided on all digital input lines. For the input lines of

the internal options connector and the auxiliary connector this is 33kΩ to

3.3V. For the auxiliary input/output lines, several pullup options are

available for the hardware (refer to “Pullup Resistors” on page 72).

Driving the Inputs Figure 3.2 shows some possible input drive circuits and illustrates the relative

simplicity of connection to the radio.

Figure 3.1 Digital input lines - simplified circuit diagrams

+3.3V

+3.3V_CL

33k

AUX_GPIO4 to 7

AUX_GPI1 to 3

+5V

+13.8V

IOP_GPIO1 to 7

CH_GPIO1

* not fitted

+3.3V

+3.3V_CL

33k

+3.3V

+3.3V_CL

33k

47k

External signals

Figure 3.2 Digital input lines - input drive circuits

open collector transistor

switches, pushbuttons,

to radio

opto-isolator

to radio

digital logic,

to radio

relay contacts (n.c. or n.o.)

micro-controller ports etc.

42 Programmable I/O Lines TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

Signal Conditioning Although the radio can apply some debouncing to inputs, excessively noisy

signals may require pre-conditioning to eliminate the worst of the noise.

A simple low-pass filter and hysteresis switch (Schmitt trigger) as shown in

Figure 3.3 will usually be adequate.

Debouncing Physical switches with bounce or jitter make it necessary to introduce a

delay before the input is recognised, in order to prevent multiple activation.

We recommend that you measure this jitter and program the input line

accordingly. If the jitter cannot be measured, we recommend that you set

the debounce time to between 50 and 100ms. If the radio exhibits erratic

behaviour upon closing or opening a switch, try increasing the debounce

time further. Signals from logic circuits or microprocessors generally do not

require debouncing. The input signal must be applied for at least the

duration of the debouncing programmed. Figure 3.4 shows the debouncing

characteristics.

Active Logic Level The active and inactive logic levels can be programmed to high or low in

the Programmable I/O form of the programming application

Important Because of the pullups, setting the active state to High will

cause the action to commence if the connector is removed

or dislodged while the radio is on. To prevent this happen-

ing, set the active state to Low.

Figure 3.3 Digital input lines - signal conditioning

to radio

low-pass

filter

Schmitt

trigger

Figure 3.4 Digital input lines - debouncing

programmed

debouncing

change of

input signal

radio initiates

input action

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Programmable I/O Lines 43

Special Purpose

Inputs AUX_GPI2, AUX_GPI3, and IOP_GPIO7 can be used as general purpose

inputs but can also be configured for the following dedicated purposes:

■AUX_GPI2 can be set to power the radio up into emergency mode

(refer to “Enter Emergency Mode” on page 48).

■AUX_GPI3 can be set to control radio power-up/power-down via an

ignition sense signal or similar (refer to “Power Sense (Ignition)” on

page 47).

■IOP_GPIO7 can be set to control radio power-up/power-down via a

logic signal (refer to “Power Sense (Ignition)” on page 47).

The use of these inputs for power sensing requires that certain hardware links

be placed on the main board assembly. For more information refer to the

service manual.

Note Conversely, if these inputs are used for other purposes it is impor-

tant to check that the hardware links are removed. If the hardware

links are not removed the radio may power up or down unexpect-

edly. Note that some of these links may have been fitted in the fac-

tory.

Input Signals Table 3.3 gives a brief description of the input signals available for programming

of the digital input lines, and indicates whether the input signals are valid for

conventional radio systems, trunked radio systems, or both.

Note The Mode column refers to the Mode field on the Programmable

I/O form.

Following the table are more detailed notes on each input signal.

Table 3.3 Digital input signals

Input action Mode Description

“Activate

THSD

Modem” on

page 68

Conventional Activates the radio’s high speed data (THSD)

modem, ready to send or receive high speed data.

This action is only valid if a license has been obtained

and entered, and the Modem Enabled check box is

selected. When the line is deactivated, the radio will

exit THSD transparent mode.

“BCD Pin 0

to 4” on

page 57

Conventional A combination of up to 5 BCD lines selects a channel

(Zone and Channel fields) or status (Status field) as

entered on the BCD tab. Set whether the user can

use the radio to access channels using the Front

Panel Channel Selection Lockout check box.

“Decrement

Channel” on

page 54

Conventional The radio goes to the previous channel. Hidden

channels will not be selected.

44 Programmable I/O Lines TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

“Enter

Emergency

Mode” on

page 48

All /

Conventional /

Trunked

When the line is activated, the radio will enter

emergency mode. The radio can optionally enter

emergency mode from a powered-off state, by

assigning the action to AUX_GPI2, setting Active to

Low, and fitting hardware link LK3. You can also add

this action to a line on the Internal Options interface

(pins beginning with IOP), but the radio will not

enter emergency mode from a powered-off state. If

LK3 is not fitted, then AUX_GPI2 can be used for

other actions. If activated while in conventional

mode, select whether the radio enters a stealth or a

non-stealth emergency in the Action

Parameters > Emergency Mode field.

“External

Call (ECR)”

on page 50

Trunked When the line is activated, the radio will set up a call

to the ECR Call String. The call will end when the

line is deactivated (if the ECR Call Clear check box is

selected).

“External

PTT 1 and 2”

on page 51

All /

Conventional /

Trunked

A nominated digital input line acts as an external

PTT (EPTT). When the line is activated, the behaviour

of the radio will follow the settings on the

Global > PTT form > External PTT (1) or External PTT

(2) tabs. Up to two external PTT input lines may be

assigned using the Auxiliary and the Internal Options

interfaces. All PTT lines can be active at any one

time. The PTT with the highest priority (PTT Priority)

will control the audio path.

“Force Audio

PA Off” on

page 65

All /

Conventional /

Trunked

Forces the audio power amplifier (PA) off. Received

audio will be processed as normal up to the PA,

allowing that audio to be routed to another source

(such as a handset). When the line is deactivated,

the radio will resume control of the PA and speaker.

“Force Audio

PA On” on

page 64

All /

Conventional /

Trunked

Forces the audio power amplifier (PA) on. This allows

the speaker to be accessed for other purposes (such

as a beep from an application device). When the line

is deactivated, the radio will resume control of the

PA and speaker.

“Home

Channel” on

page 56

Conventional The radio goes to a home channel. The home

channel is used with Decrement Channel and

Increment Channel, so the radio can select a new

channel from a known point. Select the home

channel in the Action Parameters > Home Zone and

Home Channel fields. When the line is deactivated,

the radio will remain on the home channel.

“Increment

Channel” on

page 55

Conventional The radio goes to the next channel. Hidden channels

will not be selected.

Table 3.3 Digital input signals (Continued)

Input action Mode Description

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Programmable I/O Lines 45

“Inhibit PTT”

on page 52

Conventional Returns the radio to receive mode, and enables or

disables total PTT operation (including monitor

activation, call setup, and voice or data

transmission). This applies to any PTT type with the

Inhibit PTT When External PTT Inhibit Active check

box selected.

“Lock Radio

UI (PIN to

unlock)” on

page 69

All /

Conventional /

Trunked

Locks the radio. The radio user must press the

Security PIN sequence to return the radio to a

normal state. This option is only valid if the Security

Lock on Power Up check box is selected.

“Mute

Audio

Output

Path” on

page 62

All /

Conventional /

Trunked

Closes the mute of selected audio paths so audio

will not be received. Select Speaker Audio Path,

Auxiliary Audio Path, or All Audio Paths in the

Action Parameters group box.

“Mute

External

Audio Input”

on page 61

All /

Conventional /

Trunked

Opens or closes the mute of selected audio paths so

audio will or will not be transmitted. Select Audio

Tap In, Mic Inputs or All Inputs from the Action

Parameters group box.

“Power

Sense

(Ignition)”

on page 47

All The radio will attempt to power up when the line is

activated, according to the Power On Mode setting.

When the line is deactivated, the radio will power

down. This action is only valid for the pins

AUX_GPI3 or IOP_GPIO7. If this action is assigned to

AUX_GPI3, the hardware link LK2 must be fitted. If

added to IOP_GPIO7, LK4 must be fitted. To use

these pins for other actions, the respective links

must be removed.

“Preset

Channel” on

page 60

All /

Conventional /

Trunked

If in conventional mode, the radio goes to a

temporary preset channel. When the line is

deactivated, the radio will revert to the channel the

radio was on when the line was activated. While

activated, certain user functions related to the preset

channel are not available, such as preset calls. If in

trunked mode, the radio changes to conventional

mode, and goes to a permanent preset channel. The

radio will remain on that channel, even after the line

is deactivated. Select the preset channel in the

Action Parameters > Preset Zone and Preset Channel

fields.

“RTS Control

(DCE)” on

page 68

Conventional Sets the input line on the radio for hardware flow

control (handshaking). DCE stands for data

communication equipment, and refers to the radio.

The data terminal equipment (DTE) activates this line

to indicate that it is ready to receive serial data from

the radio. Compare with the output CTS Control

(DCE). If this action is assigned to a pin, the RTS field

(Data form) will be automatically updated.

Table 3.3 Digital input signals (Continued)

Input action Mode Description

46 Programmable I/O Lines TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

“Send

Channel

Preset Call”

on page 49

Conventional Sends one of the first four preset calls for the current

channel. If the currently selected channel is assigned

to a Selcall network, this action will send a call on

the Channels form > Selcall Preset Calls tab. If the

currently selected channel is assigned to a DTMF

network, this action will send a sequence on the

Channels form > DTMF Preset Calls tab. Select

preset ID 1, 2, 3, or 4 in the Action

Parameters > Channel Preset Call field.

“Send Mic

Audio to

Spkr” on

page 63

All /

Conventional /

Trunked

Sends microphone audio to the radio’s speaker. This

action, when assigned to CH_GPIO1, can be used

with a DTMF microphone to generate DTMF side

tones. When a key is pressed on the microphone,

DMTF tones being transmitted are fed to the radio’s

speaker, at a reduced volume. This gives the radio

user confidence that the tones are being

transmitted.

“Send

Network

Preset Call

1” on page

Conventional Sends one of the first four preset calls for the

network assigned to the current channel. If the

currently selected channel is assigned to a Selcall

network, this action will send a preset call on the

Network Preset Calls tab (Selcall > Free Format

Bursts form). If the currently selected channel is

assigned to a DTMF network, this action will send a

sequence on the Network Preset Calls tab

(DTMF > DTMF Signalling form). Select preset ID 1,

2, 3, or 4 in the Action Parameters > Network Preset

Call field.

“Simulate F1

to F4 Key”

on page 66

All /

Conventional /

Trunked

Initiates the action assigned to a function key,

creating an external function key. Short and long

presses of the input line will reflect short and long

presses of the function key. If there is no action

assigned to the function key, then no action will

result.

“Toggle

Alarm

Mode” on

page 67

Conventional Begins or ends GPS alarm mode. When the line is

activated, the radio will switch to the GPS channel (if

the Poll Response Channel Type is Dedicated), and

begin sending the radio’s current GPS location data

every Callout Interval. Alarm mode will end when

the Maximum Number of Callouts is reached, or this

line is deactivated.

“Toggle

F1 to F4 Key

LED” on

page 67

All /

Conventional /

Trunked

Results in one of the function key LEDs displaying.

This action can be used when the F1 or F4 key has

activated an output line (F1 to F4 Key Status), to

indicate the status of an application device.

“Toggle

Stand-by

Mode” on

page 47

All /

Conventional /

Trunked

When the line is activated, the radio exits stand-by

mode into a powered-on state. When the line is

deactivated, the radio enters stand-by mode where

the radio appears off. If this action is assigned to

CH_GPIO1, then the line can only be active low (the

Active field must not be set to High).

Table 3.3 Digital input signals (Continued)

Input action Mode Description

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Programmable I/O Lines 47

3.1.1 Toggle Stand-by Mode

Application This input signal is used to toggle between a powered-on state, and a stand-

by state where the radio appears off. The radio will draw approximately 28mA

when in stand-by mode.

Configuration Configure an input line and associate it with this action. Set the active state

to high and the debounce time (0 to 100ms).

Note If using the CH_GPIO port however, this function can only work

when the active state is set to low.

Timing The input line must be activated for at least 5s.

Description When the input line is activated, the radio exits stand-by mode.

When the input line is deactivated, the radio enters stand-by mode.

Related Actions The ‘Power Sense (Ignition)’ input signal can be used to power the radio

down to a consumption of <1mA.

3.1.2 Power Sense (Ignition)

Application If AUX_GPI3 is configured for ‘auxiliary power sense’ or IOP_GPIO7 is

programmed for ‘internal options power sense’, these input lines can no

longer be used as general inputs. In order to prevent any other action to be

accidentally programmed for one of these input lines, these input lines

should be set to ‘Power Sense (Ignition)’. This setting itself has no function.

For more information refer to the service manual.

“Toggle Tx

RF Inhibit”

on page 53

Conventional Toggles the ability of the radio’s transmitter to

generate radio frequency (RF) power. If the radio is

restricted from generating RF, it will still enter and

exit the transmit state, indicate transmit to the user,

count down any Tx Timer Duration, and send

signalling through the transmit audio path. The state

of this line will not restrict the radio’s ability to

transmit in emergency mode.

“Unmute

Audio

Output

Path” on

page 63

All /

Conventional /

Trunked

Opens the mute of selected audio paths so audio

will be received. Select Speaker Audio Path. Auxiliary

Audio Path or All Audio Paths in the Action

Parameters group box.

Table 3.3 Digital input signals (Continued)

Input action Mode Description

48 Programmable I/O Lines TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

3.1.3 Enter Emergency Mode

Application This input signal is used to enter the emergency mode. For more

information on emergency mode refer to the online help of the

programming application.

Use this action with the AUX_GPI2 line to configure the ‘emergency

power sense’ option to power up the radio into emergency mode. The

‘emergency power sense’ is completely independent of any other power

sense option configured in the radio. For more information refer to the

service manual.

Note The ‘Enter Emergency Mode’ action can be programmed on

AUX_GPI2 or IOP_GPIO1…7, but only AUX_GPI2 provides

the ability to also power up the radio.

Configuration 1. If required, configure the ‘emergency power sense’ option as

described in the service manual.

2. Configure the additional parameters required for the emergency

mode (stealth, emergency call settings etc.).

3. Configure an input line (AUX_GPI2 with emergency power sense)

and associate it with this action. Set the active state to low.

As the emergency input driver is usually a mechanical switch, to

prevent accidental activation, set the debounce time to 100ms.

Timing The input line must be activated for at least 2s.

Description If ‘emergency power sense’ is configured and the radio is off, activation of

AUX_GPI2 for >2s will power up the radio and enter it into emergency

mode immediately. If ‘emergency power sense’ is not configured and the

radio is off, activation of the programmed input line will have no effect.

If ‘emergency power sense’ is not configured and the radio is on, activation

of the programmed input line will enter it into emergency mode

immediately.

The radio will ignore further assertions of this input line until emergency

mode has been exited at which point another assertion of this line would

cause emergency mode to be initiated again.

If this input is active when the radio is powered on, the radio will enter

emergency mode immediately.

Related Actions None.

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Programmable I/O Lines 49

3.1.4 Send Channel Preset Call

Application When activated, this action sends a fixed-format Selcall call, or DTMF call,

for the current channel.

Note Only channel preset call 1 can be sent for TM8200.

Configuration 1. Configure channel preset call sequences associated with each net-

work/channel.

2. Configure the additional parameters required to make a preset call.

3. Configure an input line and associate it with this action. Set the active

state (high or low) and the debounce time.

Timing Call duration depends on the programmed signalling scheme timing.

Description When the input line is activated, the leading edge triggers the attempt to

transmit an outgoing call using the signalling scheme associated on this

channel.

The radio will ignore state changes on this input line until the transmission

has completed. Once the transmission has completed, assertion of this input

line will be acted upon as normal.

This input line is of a momentary type and therefore no action is performed

on its deactivation.

Related Actions The PTT can be programmed to initiate a call on PTT press.

50 Programmable I/O Lines TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

3.1.5 Send Network Preset Call 1

Application When the nominated input line is activated, the radio transmits a predefined

free-format sequence over the air.

For both Selcall and DTMF calls, four free format preset sequences can be

specified per network. This input signal is used to send the free format preset

1 sequence over the air. For more information on free format preset

sequences refer to the online help of the programming application.

Note Only free-format preset 1 can be sent with this input signal.

Configuration 1. Configure the parameters required to send the free format preset 1

sequence.

2. Configure an input line and associate it with this action. Set the active

state (high or low) and the debounce time.

Timing Call duration depends on the programmed signalling scheme timing.

Description When the input line is activated, the radio determines the current channel

and network and sends free format preset 1 sequence.

Tip Use the input signals for channel selection (e.g. ‘Home Channel’)

to select the channel with the desired network before activating

this signal.

The radio will ignore state changes on this input line until the transmission

has completed. Once the transmission has completed, assertion of this input

line will be acted upon as normal.

This input line is of a momentary type and therefore no action is performed

on its deactivation.

Related Actions To send other configured free format preset calls, program them to any of

the function keys and use the ‘Simulate F1 to F4 Key’ action to simulate the

key press (refer to “Simulate F1 to F4 Key” on page 66).

3.1.6 External Call (ECR)

Application When the line is activated, the radio will set up a call to the ECR Call

String. The call will end when the line is deactivated (if the ECR Call Clear

check box is selected). Refer to the programming application online help

for more details.

Configuration 1. Configure the Fleet Parameters to enable ‘External Call Required’.

2. Configure an input line and associate it with this action. Set the active

state (high or low) and the debounce time.

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Programmable I/O Lines 51

Timing Call duration depends on the programmed signalling scheme timing.

Description The radio will ignore state changes on this input line until the transmission

has completed. Once the transmission has completed, assertion of this input

line will be acted upon as normal.

This input line is of a momentary type and therefore no action is performed

on its deactivation.

Related Actions This is the MPT trunked equivalent of “Send Network Preset Call 1” on

page 50.

3.1.7 External PTT 1 and 2

Application This input signal is used to configure an input line as an external PTT. Up

to two external PTT input lines can be assigned using the auxiliary and the

internal options connectors. All PTT lines may be active at any time, and

the PTT line with the highest priority controls the audio path. For more

information on PTT refer to the online help of the programming

application.

Configuration Configure an input line and associate it with this action. Set the active state

(high or low) and the debounce time.

Timing The response time is less than 8 ms to 90% of full power plus debounce time.

Description When the input line is activated, the radio executes the PTT operation.

If the 'Toggle Tx RF Inhibit' or ‘Inhibit PTT’ actions are active, no action

will result. If ‘Toggle Tx RF Inhibit’ or ‘Inhibit PTT’ action is activated

within 300µs following an activation of Activate External PTT action, the

external PTT action will not be initiated.

If the input line is active while the radio is powered up, it must be re-applied

for the action to be carried out.

Related Actions The ‘Reflected PTT Status’ reports the PTT status by generating a logic

OR of all PTT sources programmed to reflect their status.

52 Programmable I/O Lines TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

3.1.8 Inhibit PTT

Application This input signal is used to stop any current PTT transmissions, return to

receive state and inhibit any further PTT transmission requests. This allows

external applications to interrupt user-initiated transmissions, and prevents

users from interrupting e.g. a data transmission.

Configuration 1. In the PTT form, configure the ‘Inhibit PTT When External PTT

Inhibit Active’ check box for each PTT type.

2. In the Programmable I/O form, configure an input line and associate

it with this action. Set the active state (high or low) and the debounce

time (0 to 100ms).

Timing If this line is activated within 300µs following an activation of any one of the

PTT sources, the PTT action will not be initiated.

Description When this input line is activated, the radio stops any current PTT

transmissions and inhibits any further PTT requests.

If the input line is active while the radio is powered up, it must be re-applied

for the action to be carried out.

Note Non-PTT transmission such as calls programmed on a function

key will be carried out, even when this signal is active.

Emergency Mode

Transmission If an emergency mode transmission is requested, the ‘Inhibit PTT’ action

will be ignored. Once the emergency mode transmission is complete, the

‘Inhibit PTT’ action will be restored if the input line is still active.

Related Actions The ‘Toggle Tx RF Inhibit’ input signal allows the radio to be in transmit

mode but inhibits transmitting.

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Programmable I/O Lines 53

3.1.9 Toggle Tx RF Inhibit

Application This input signal is used to prevent the RF carrier from being radiated while

in transmit mode. This can be used e.g. for precise timing of data

transmissions such as GPS.

Activation of one or more ‘Toggle Tx RF Inhibit’ input lines will inhibit

the radios transmitter PA from generating RF power. The radio is otherwise

unaffected by this input (i.e. the radio will still enter and exit transmit state,

indicate transmit to the user, time transmit duration, send signalling through

the transmit audio path and in all other respects act as per normal).

Configuration Configure an input line and associate it with this action. Set the active state

(high or low) and the debounce time. This action can be programmed to

both the auxiliary and the internal options connector at the same time

(logical OR).

Timing The input line has a response time of less than 2.5ms.

If this line is activated within 300µs following an activation of any one of the

PTT sources, the PTT action will not be initiated.

Description When any ‘Toggle Tx RF Inhibit’ input line is activated and the radio is in

transmit mode (on any channel and independent of the type of

transmission), the radio will ramp down the RF power to <–10dBm

(100µW), but it will remain in the transmit state.

Note If the transmitting radio is RF inhibited, there is no inhibit beep.

If the input line is active while the radio is powered up, it must be re-applied

for the action to be carried out.

When all ‘Toggle Tx RF Inhibit’ input lines are deactivated and the radio

is in transmit mode, the radio will ramp up the RF power to its previous

setting.

If the radio starts transmission while one or more ‘Toggle Tx RF Inhibit’

input lines are active, the radio will enter transmit state as normal, but will

not ramp up the RF power.

Figure 3.5 Toggle Tx RF Inhibit

TX processing chain PA

modulator

AUX_MIC_AUD

audio tap points

(mapped from AUD_TAP_IN)

Tx audio path

mux

MIC_AUD

mute

Mute External

Audio Input

mute

Toggle Tx RF Inhibit

54 Programmable I/O Lines TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

The radio is able to leave the transmit state (e.g. to return to receive state)

irrespective of the state of the ‘Toggle Tx RF Inhibit’ input lines.

Emergency Mode

Transmission If an emergency mode transmission is requested, the ‘Toggle Tx RF Inhibit’

input line will be ignored. Once the emergency mode transmission is

complete, the ‘Toggle Tx RF Inhibit’ action will be restored if the input line

is still active.

Related Actions The ‘Inhibit PTT’ input signal stops any current PTT transmissions, returns

to receive state and inhibits any further PTT transmission requests.

3.1.10 Decrement Channel

Application This input signal is used to select the next lowest channel. This action uses

the same restrictions for channel wrap around as programmed.

Configuration 1. Configure a list of channels.

2. Enable or disable the front panel lockout as desired (BCD tab).

3. Configure an input line and associate it with this action. Set the active

state (high or low) and the debounce time.

4. Select a defined channel, if desired, using the ‘Home Channel’

actions.

Timing The time between pulses should be at least 20ms. The minimum pulse

width is the debounce time plus 2ms.

Description When this input line is activated, the radio decrements the current channel.

If the radio is at the start of the channel list and wrap around is disabled, the

radio ignores the channel change request.

Note The one-digit control head restricts user mode selection of fixed

channels or a group to those channels in the range 0 to 9. If a

channel that is not permitted for the one-digit control head is

requested, then the radio shall select the first/last permitted chan-

nel (wrap around).

This input line is of a momentary type and therefore no action is performed

on its deactivation.

Related Actions The ‘Increment Channel’ input signal performs the corresponding action of

incrementing the channel.

The ‘BCD Pin 0 to 4’ input signal is used to change to a specified channel

number.

The ‘Home Channel’ input signal is used to change to a specified reference

channel, which can be used to increment or decrement from.

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Programmable I/O Lines 55

3.1.11 Increment Channel

Application This input signal is used to select the next highest channel. This action uses

the same restrictions for channel wrap around as programmed.

Configuration 1. Configure a list of channels.

2. Enable or disable the front panel lockout as desired (BCD tab).

3. Configure an input line and associate it with this action. Set the active

state (high or low) and the debounce time.

4. Select a defined reference channel, if desired, using the ‘Home

Channel’ action.

Timing The time between pulses should be at least 20ms. The minimum pulse

width is the debounce time plus 2ms.

Description When this input line is activated, the radio increments the current channel.

If the radio is at the end of the channel list and wrap around is disabled, the

radio ignores the channel change request.

Note The one-digit control head restricts user mode selection of fixed

channels or a group to those channels in the range 0 to 9. If a

channel that is not permitted for the one-digit control head is

requested, then the radio shall select the first/last permitted chan-

nel (wrap around).

This input line is of a momentary type and therefore no action is performed

on its deactivation.

Related Actions The ‘Decrement Channel’ input signal performs the corresponding action

of decrementing the channel.

The ‘BCD Pin 0 to 4’ input signal is used to change to a specified channel

number.

The ‘Home Channel’ input signal is used to change to a specified reference

channel, which can be used to increment or decrement from.

56 Programmable I/O Lines TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

3.1.12 Home Channel

Application This input signal is used to change to a specified reference channel, which

can then be used to increment or decrement from.

Configuration 1. Configure a list of channels.

2. Configure an input line and associate it with this action. Set the active

state (high or low) and the debounce time.

3. On the same form, select the home channel.

Timing Allow 10ms before applying another channel change action.

Description When this input line is activated, the radio changes to the home channel.

This input line is of a momentary type and therefore no action is performed

on its deactivation.

If the input line is active while the radio is powered up, it must be re-applied

for the action to be carried out.

Note The one-digit control head restricts user mode selection of fixed

channels or a group to those channels in the range 0 to 9. If a

channel that is not permitted for the one-digit control head is

requested, then the request shall be ignored and the radio shall

remain on the original channel.

Related Actions The ‘Preset Channel’ input signal is used to temporarily select a pre-

programmed channel

The ‘BCD Pin 0 to 4’ input signal is used to change to a specified channel

number.

The ‘Increment Channel’ and ‘Decrement Channel’ input signals are used

to increment or decrement the current channel by one.

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Programmable I/O Lines 57

3.1.13 BCD Pin 0 to 4

Application These signals are used by TM8100 and TM8200 radios to select a discrete

channel using a bit pattern on up to five input lines. With TM8200 radios

they can also be used to select Selcall status.

TM8100 BCD/BIN

Operation The bit pattern can be decoded in BCD or binary (BIN) operation.

In BCD operation, the bit pattern is divided into a block of four signals (pin

0 to 3) to provide the decimal numbers 0 to 9 (0000 to 1001), and a most

significant bit (pin 4) to indicate 0 or 1. This allows five lines to represent

the decimal channel numbers 0 to 19. Invalid BCD bit patterns are ignored.

In BIN operation, the bit pattern represents the decimal channel numbers

0to31.

Table 3.4 shows a list of BCD pin signals and their equivalent BCD and BIN

channel numbers for TM8100 radios.

When any of these input lines changes, the corresponding channel will be

selected.

TM8200 BCD/BIN

Operation The bit pattern can be decoded in BCD or binary (BIN) operation.

In BCD operation, the bit pattern is divided into a block of four signals (pin

0 to 3) to provide the decimal numbers 0 to 9 (0000 to 1001), and a most

Table 3.4 TM8100 BCD pin signals and BCD/binary channels

BCD Pin Channel

43210BCDBIN

0000000

0000111

0001022

…………………

0100199

01010Prev

1. ‘Prev’ means that the input is ignored (invalid BCD) and that the previ-

ously selected channel remains selected.

01011Prev

111

…………………

01111Prev

115

100001016

100011117

…………………

110011925

11010Prev

126

…………………

11111Prev

131

58 Programmable I/O Lines TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

significant bit (pin 4) to indicate 0 or 1. This allows five lines to represent

the decimal channel numbers 1 to 19. Invalid BCD bit patterns are ignored.

In BIN operation, the bit pattern represents the decimal channel numbers

1 to 31.

When channel 0 is selected in either BCD or BIN mode, no channel change

occurs.

Table 3.5 shows a list of BCD pin signals and their equivalent BCD and BIN

channel numbers for TM8200 radios.

When any of these input lines changes, the corresponding channel will be

selected.

Configuration 1. Configure up to 5 input lines and associate them with this action.

Set the active state (high or low) and the debounce time (preset to

10ms). Lines must be assigned in order, starting with pin 0 (LSB).

Unassigned signals are assumed to be logic 0.

2. Select BCD or BIN operation (BCD tab).

3. Enable or disable the front panel lockout as desired (BCD tab).

4. Configure a list of channels corresponding to the BCD or binary

values.

Table 3.5 TM8200 BCD pin signals and BCD/binary channels

BCD Pin Channel

43210BCDBIN

00000 No change

0000111

0001022

…………………

0100199

01010Prev

1. ‘Prev’ means that the input is ignored (invalid BCD) and that the previ-

ously selected channel remains selected.

01011Prev

111

…………………

01111Prev

115

100001016

100011117

…………………

110011925

11010Prev

126

…………………

11111Prev

131

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Programmable I/O Lines 59

Timing A fixed debounce time of 4ms is applied to all BCD inputs to ensure that all

lines have settled to their new state before being read. This is adequate for

logic-driven inputs but additional debounce time needs to be programmed

if a BCD switch or similar is used.

Description When the current state of the BCD input lines is changed, the radio

determines the new channel according to Table 3.4 and selects it for use.

When the radio is turned on, the BCD input lines are read. If the BCD

input lines are not set to zero, the radio will select the corresponding

channel. If they are set to zero, the radio will select the last saved channel.

If the bit pattern in BCD operation does not represent a valid BCD number

(from 01010 to 01111, and from 11010 to 11111), the radio will remain on

the current channel.

When the current state of the BCD input lines is changed while the radio

is in transmit mode, the channel change will be carried out as soon as the

radio returns to receive mode.

Note The one-digit control head restricts user mode selection of fixed

channels or a group to those channels in the range 0 to 9. If a

channel that is not permitted for the one-digit control head is

requested, then the request shall be ignored and the radio shall

remain on the original channel.

Related Actions The ‘Increment Channel’ and ‘Decrement Channel’ input signals are used

to increment or decrement the current channel by one.

The ‘Home Channel’ input signal is used to change to a specified reference

channel, which can be used to increment or decrement from.

60 Programmable I/O Lines TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

3.1.14 Preset Channel

Application This input signal is used to temporarily select a pre-programmed channel.

When this input line is deactivated, the radio returns to the channel it was

on at the time the input line was activated. This allows temporary channel

change for purposes such as transmitting GPS data on a data channel instead

of the voice channel.

Note On MPT trunked systems, this input signal selects the channel

permanently. It will not change back on deactivation. Refer to the

programming application online help for more details.

Configuration 1. Configure a list of channels.

2. Configure an input line and associate it with this action. Set the active

state (high or low) and the debounce time.

3. On the same form, select the preset channel. Hidden channels are also

available for selection. Scan group IDs are not available.

Timing Allow debounce time plus 2ms plus time for channel change (typically

10ms) for the preset channel to be selected or to return to the previous

channel. If timing is critical in your application, then this will need to be

measured with the frequency step you intend to use.

Description When the input line is activated, the currently selected channel ID is stored

for future use and the radio changes to the preset channel.

When the input line is deactivated, the radio returns to last selected channel.

While the input line is activated, the channel selection keys on the control

head are not functional.

If the input line is active while the radio is powered up, it must be re-applied

for the action to be carried out.

If a preset channel is selected, and the radio powers down and up again, then

the last selected channel will be selected, not the preset channel.

Note The one-digit control head restricts user mode selection of fixed

channels or a group to those channels in the range 0 to 9. If a

channel that is not permitted for the one-digit control head is

requested, then the request shall be ignored and the radio shall

remain on the original channel.

Related Actions The ‘BCD Pin 0 to 4’ input signal is used to change to a specified channel

number.

The ‘Home Channel’ input signal is used to permanently change to a

specified reference channel, which can be used to increment or decrement

from.

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Programmable I/O Lines 61

3.1.15 Mute External Audio Input

Application This input signal is used to open or close the mute of selected audio inputs

to allow or prevent transmission of unwanted audio. This can be useful in

cases where a controller wants to send information and does not want to be

interrupted by incoming audio.

Configuration 1. Configure an input line and associate it with this action. Set the active

state (high or low) and the debounce time.

2. On the same form, configure an option to mute the audio from the

microphone inputs, the audio tap inputs, or all audio inputs.

Timing The response time for both activation and deactivation is approximately 2ms

plus debounce time.

Description When the input line is activated, the radio mutes the audio input(s) selected.

If a higher priority unmute condition exists, activation of this line will have

no effect.

When the input line is deactivated, the audio input path reverts to its

previous state. If a higher priority mute condition exists, deactivation of this

line will have no effect.

If the input line is active while the radio is powered up, it must be re-applied

for the action to be carried out.

Related Actions None.

Figure 3.6 Mute External Audio Input

TX processing chain PA

modulator

AUX_MIC_AUD

audio tap points

(mapped from AUD_TAP_IN)

Tx audio path

mux

MIC_AUD

mute

Mute External

Audio Input

mute

Toggle Tx RF Inhibit

62 Programmable I/O Lines TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

3.1.16 Mute Audio Output Path

Application This input signal is used to close the mute of selected audio paths to prevent

audio from being output. This allows an external device to turn off audio to

the speaker (e.g. for a data channel) or other audio equipment.

Configuration 1. Configure an input line and associate it with this action. Set the active

state (high or low) and the debounce time.

2. On the same form, configure an option to mute the audio output of

the speaker output path, the auxiliary output path, or all output paths.

Timing The response time for both activation and deactivation is approximately 2ms

plus debounce time.

Description When this input line is activated, the radio mutes the configured audio

output path(s). If a higher priority unmute condition exists, activation of this

line will have no effect.

When this input line is deactivated, the audio output path(s) reverts to its

(their) previous state. If higher priority mute condition exists, deactivation

of this line will have no effect.

If the input line is active when the radio is powered up, it must be re-applied

for the action to be carried out.

Related Actions The ‘Unmute Audio Output Path’ input signal activates the Rx audio path

only.

The ‘Force Audio PA Off’ input signal deactivates the audio PA.

The ‘Force Audio PA On’ input signal activates the audio PA.

Figure 3.7 Mute/Unmute Audio Path

RX processing chain mute audio PA

vol speaker

RX_BEEP_IN

Mute/Unmute

Audio Output Path

audio tap points

(on AUD_TAP_OUT) RX_AUD

Rx audio path

beep audio path

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Programmable I/O Lines 63

3.1.17 Unmute Audio Output Path

Application This input signal is used to open the mute of selected audio paths to allow

audio to be received. This allows the signal to go through to the speaker (e.g.

for beeps of an external device, a public address system, or an external voice

recorder). Please refer also to Figure 3.7 on page 62.

Configuration 1. Configure an input line and associate it with this action. Set the active

state (high or low) and the debounce time.

2. On the same form, configure an option to unmute the audio output

of the speaker output path, the auxiliary output path, or all output

paths.

Timing The response time for both activation and deactivation is approximately 2ms

plus debounce time.

Description When this input line is activated, the radio unmutes the configured audio

output path(s). If a higher priority mute condition exists, activation of this

line will have no effect.

When this input line is deactivated, the audio output paths revert to their

previous state. If higher priority unmute condition exists, deactivation of

this line will have no effect.

Related Actions The ‘Mute Audio Output Path’ input signal deactivates the Rx audio path

only.

The ‘Force Audio PA Off’ input signal deactivates the audio PA.

The ‘Force Audio PA On’ input signal activates the audio PA.

3.1.18 Send Mic Audio to Spkr

Application Sends microphone audio to the radio’s speaker.

Configuration Configure an input line and associate it with this action. Set the active state

(high or low) and the debounce time.

Timing The response time for both activation and deactivation is approximately 2ms

plus debounce time.

Description When this input line is activated, the radio routes the microphone audio

path to the speaker.

When this input line is deactivated, the microphone path to the speaker is

removed.

If this input line is active at power-up, the configured action on activation

has to be executed after startup, on transition to user mode.

64 Programmable I/O Lines TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

This action, when assigned to CH_GPIO1, can be used with a TM8100 or

TM8200 DTMF microphone to generate DTMF side tones. When a key is

pressed on the microphone, DTMF tones being transmitted are fed to the

radio’s speaker, at a reduced volume. This gives the radio user confidence

that the tones are being transmitted.

Related Actions The ‘Mute Audio Output Path’ input signal activates the Rx audio path

only.

The ‘Unmute Audio Output Path’ input signal deactivates the Rx audio

path only

3.1.19 Force Audio PA On

Application This input signal is used to activate the audio PA. This action is required to

allow any audio on the RX_BEEP_IN line of the internal options

connector to be heard from the speaker when no other audio unmute

conditions exist.

Configuration Configure an input line and associate it with this action. Set the active state

(high or low) and the debounce time.

Timing When this input line is activated and the audio PA is off, there will be a delay

of 50ms before audio PA output is unmuted. This delay prevents undesired

transient noise (audible ‘pop’) caused by the audio PA powering up. If the

audio PA is already on or there has been speaker audio within 100ms prior

to activation there is no significant unmute delay.

Description When this input line is activated, the radio unmutes the audio PA. If the

audio PA is already unmuted, no action occurs. If a higher priority mute

condition exists, activation of this line will have no effect.

When this input line is deactivated, the audio PA reverts to its previous state.

If a higher priority unmute condition exists, deactivation of this line will

have no effect.

Figure 3.8 Force Audio PA on/off

RX processing chain mute audio PA

vol speaker

RX_BEEP_IN

Force Audio PA

on/off

audio tap points

(on AUD_TAP_OUT) RX_AUD

Rx audio path

beep audio path

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Programmable I/O Lines 65

If the input line is active while the radio is powered up, it must be re-applied

for the action to be carried out.

Related Actions A related ‘Force Audio PA Off’ input signal exists, for which another input

line can be assigned. Separate input lines are needed because deactivation of

each line should release the corresponding action rather than forcing the

audio PA into the opposite state.

The ‘Mute Audio Output Path’ input signal activates the Rx audio path

only.

The ‘Unmute Audio Output Path’ input signal deactivates the Rx audio

path only.

3.1.20 Force Audio PA Off

Application This input signal is used to deactivate the audio PA. This action is required,

for example, to allow the use of a telephone handset for which - when it is

taken off hook - the audio PA should be deactivated to prevent the audio

from coming out of the internal or remote speaker. Please refer also to

Figure 3.8 on page 64.

Configuration Configure an input line and associate it with this action. Set the active state

(high or low) and the debounce time.

Timing When this input line is activated and the audio PA is on, there will be no

significant delay before the speaker audio is muted. After 100ms the audio

PA will be fully powered down and current consumption will reduce by

50mA.

Description When this input line is activated, the radio mutes the audio PA. If the audio

PA is already muted, no action occurs.

When this input line is deactivated, the audio PA reverts to its previous state.

If the input line is active while the radio is powered up, it must be re-applied

for the action to be carried out.

Activation of ‘Force Audio PA Off’ input line takes precedence over the

‘Force Audio PA On’ input line. When both inputs are active at the same

time, the speaker is disabled but any audio signal present is still output

through RX_AUD.

Related Actions A related ‘Force Audio PA On’ input signal exists, for which another input

line can be assigned. Separate input lines are needed because deactivation of

each line should release the corresponding action rather than forcing the

audio PA into the opposite state.

The ‘Mute Audio Output Path’ input signal activates the Rx audio path

only. The ‘Unmute Audio Output Path’ input signal deactivates the Rx

audio path only.

66 Programmable I/O Lines TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

3.1.21 Simulate F1 to F4 Key

Application These input signals are used to simulate the press of function keys on the

control head. Both short and long key presses can be simulated.

These input lines do not perform any pre-defined actions, but only simulate

the press of specific function keys. This means that when the associated

function key is re-programmed to carry out a different function, activation

of this line will also carry out the new function.

Configuration Configure an input line and associate it with this action. Set the active state

(high or low) and the debounce time.

Timing When a function key has only one function assigned, the key press will be

actioned as soon as it is sensed.

When a function key is assigned different functions for short and long key

press:

■The short key press function will be actioned as soon as the signal is

released, if the signal has been active for between 100 and 750ms.

■The long key press function will be actioned as soon as the signal has

been active for 750 ms.

Description When any of these input lines is activated, the function associated with the

corresponding function key is carried out. Short/long activations of this

input line will have the same effect as short/long function key presses.

Related Actions The ‘Toggle F1 to F4 Key LED’ input signals are used to turn the LEDs of

the control head on and off for display purposes, e.g. for key functions that

have no LED assigned.

The ‘F1 to F4 Key Status’ output signals are used to reflect the press of

function keys on the control head.

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Programmable I/O Lines 67

3.1.22 Toggle F1 to F4 Key LED

Application These input signals are used to turn the LEDs of the control head on and off

for display purposes, e.g. for key functions that have no LED assigned. When

any of these lines are active, no other source will be able to control the

associated LED.

Note The graphical-display control head only has two LEDs, for the F1

and F4 key.

Configuration Configure an input line and associate it with this action. Set the active state

(high or low) and the debounce time.

Timing The display is updated every 50ms. The response time of the LED can

therefore be between 2 and 52ms plus debounce time.

Description When this input line is activated, the associated LED lights up.

When this input line is deactivated, the associated LED goes out.

If the input line is active while the radio is powered up, it must be re-applied

for the action to be carried out.

Related Actions The ‘Simulate F1 to F4 Key’ input signals are used to simulate the press of

function keys on the control head. Both short and long key presses can be

simulated.

The ‘F1 to F4 Key Status’ output signals are used to reflect the press of

function keys on the control head.

3.1.23 Toggle Alarm Mode

Application Begins or ends GPS alarm mode.

When the line is active, the radio will switch to the channel indicated by the

Channel Type, and begin sending the radio’s current GPS location data

every Callout Interval.

Alarm mode will end when the Maximum Number of Callouts is reached,

or the line is deactivated.

Configuration 1. Configure the Emergency Mode and Channel Type parameters

required, as well as the SDM Enabled and GPS Alarm Mode param-

eters.

2. Configure an input line and associate it with this action. Set the active

state (high or low) and the debounce time.

Timing The response time for both activation and deactivation is approximately 2ms

plus debounce time.

68 Programmable I/O Lines TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

Description The input line is activated by a third party device.

The radio immediately begins the Alarm Mode operation according to the

characteristics defined for the network and channel.

The radio will cancel Alarm Mode operation once this input is deactivated.

If this input is active at power-up, the Alarm Mode is entered immediately

at startup.

Related Actions None

3.1.24 Activate THSD Modem

Application Activates the radio’s high speed data (THSD) modem, ready to send or

receive high speed data.

Configuration Configure an input line and associate it with this action. Set the active state

(high or low) and the debounce time.

Timing The response time for both activation and deactivation is approximately 2ms

plus debounce time.

Description When the nominated input line is activated, the radio will activate the

THSD modem. This will select the protocol according to the database

settings for THSD protocol and FEC.

This action is only valid if a Software Feature Enabler (SFE) license has been

obtained, and entered, and the Modem Enabled check box has been

selected. When the line is deactivated, the radio will exit THSD transparent

mode.

Note If the radio is configured to startup in THSD transparent mode,

then deactivation of the input ‘Activate THSD Mode’ will not

exit THSD transparent mode after the radio is powered up.

Related Actions Powerup State “THSD Transparent Mode”.

3.1.25 RTS Control (DCE)

Application Sets the input line on the radio for hardware flow control (handshaking).

DCE stands for data communication equipment, and refers to the radio. The

data terminal equipment (DTE) activates this line to indicate that it is ready

to receive serial data from the radio.

Note If this action is assigned to a pin, the RTS field will be automati-

cally updated.

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Programmable I/O Lines 69

Important Inputs selected for this purpose will need to have a 3K3

resistor placed in series with the input, to make them

RS232 level compatible.

Configuration 1. Configure Serial Communications - Flow Control in Command

Mode and/or Transparent Mode for “Hardware”.

2. Select Hardware Flow Control I/O Pins for both CTS (DCE) and

RTS ( DCE).

3. Configure Active Low/High for RTS and CTS.

4. Configure Debounce time for RTS and CTS.

Timing The input response time for both activation and deactivation of RTS (DCE)

is less than 1ms.

Note Debounce time for RTS (DCE) should be set to ‘0’.

Description The external third party device (DTE) activates this RTS control line to

indicate to the radio that it is ready to receive serial data from the associated

TXD line of the radio.

Related Actions ‘CTS Control (DCE)’ sets the output line on the radio for hardware flow

control.

3.1.26 Lock Radio UI (PIN to unlock)

Application Locks the radio. The radio user must press the Security PIN sequence to

return the radio to a normal state. This option is only valid if the Security

Lock on Power Up check box is selected.

Configuration 1. Configure the security PIN.

2. Configure an input line and associate it with this action. Set the active

state (high or low) and the debounce time.

Timing Allow debounce time plus 2 ms.

Description When the input line is activated, the radio UI goes into secure mode.

Related Actions None.

70 Programmable I/O Lines TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

3.2 Digital Output Lines

This section describes the general design principles for use of the

programmable I/O lines configured as outputs, and the output signals that

can be set for them.

Available Output

Lines The following lines are available to be used as outputs:

For details on the connector pin-outs and electrical characteristics of these

lines refer to “Description of the Radio Interfaces” on page 13.

Compatibility Table 3.2 describes the compatibility of the output lines with common

industry logic standards:

Table 3.6 Digital output lines

Signals Connector Direction

AUX_GPIO4…7 auxiliary connector input or output

IOP_GPIO1…7 internal options connector input or output

CH_GPIO1

MIC_GPIO11

PRG_GPIO11

1. CH_GPIO1 of the control head connector is the same signal as MIC_GPIO1 of the

microphone connector (control heads with user interface) and PRG_GPIO1 of the pro-

gramming connector (blank control head).

control head connector

microphone connector

programming connector

input or output

Table 3.7 Digital output lines - compatibility

Output line

Logic standard output compatibility

3.3V CMOS 5V CMOS 5V TTL RS-2321

1. While the output levels do not comply with the RS-232 standard, almost all modern

RS-232 level conversion devices are 3.3V/5V CMOS or TTL level-compatible. There-

fore, it usually possible to drive modern external RS-232 devices directly without level

conversion if the length of the connection cable is <3m.

AUX_GPIO4…7Yes Yes

2. Yes, provided internal pullups to 5V are selected.

Yes No

AUX_TXD Yes No Yes No

IOP_GPIO1…7Yes No

3. These outputs can be made 5V CMOS-compatible using a 3.3kΩ pullup resistor to

5V that is provided by the device being driven.

Yes No

IOP_TXD Yes No3Yes N o

CH_TXD

MIC_TXD

PRG_TXD

Yes No Yes No

CH_GPIO1

MIC_GPIO1

Yes No3Ye s No

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Programmable I/O Lines 71

Output Circuitry The digital outputs are designed to interface to application circuitry in a

straightforward manner. Figure 3.9 shows a simplified diagram of the digital

output lines (ESD protection not shown). For full details of the interface,

refer to the PCB information or to the technical support website.

The internal logic circuitry of the radio operates at 3.3V. Unless application

circuitry is able to operate at this voltage level, some form of level conversion

will normally be required. With the AUX and CH output lines, conversion

to 5V or 13.8V can be selected by moving the pullup resistor as indicated

in Figure 3.9.

Note These resistors only provide a weak pullup and hence the output

is only able to source a very small current. In the logic low state,

the outputs can sink a higher current. For more information refer

to “Description of the Radio Interfaces” on page 13.

The IOP output lines always operate at 3.3V logic levels and any level

conversion is the responsibility of the application circuit designer.

Figure 3.9 Digital output lines - simplified circuit diagrams

4.7k

AUX_GPIO4…7a

+3.3V

33k

IOP_GPIO1…7

4.7k

+3.3V

100k

+3.3V+5V

+13.8V

a. With AUX_GPIO4…7, the

33kΩ resistor can be

moved to change the logic

high output voltage to +5V

or +13.8V.

33k*

CH_GPIO1

72 Programmable I/O Lines TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

Pullup Resistors For the output lines AUX_GPIO4 to AUX_GPIO7 the output

configuration is open collector with pullup. The hardware provides several

pullup options.

Placeholder pullup resistors to 3.3V, 5V or 13.8V are provided. Table 3.8

gives an overview of the output lines and their placeholder pullup resistors.

At power up and power off, the voltage of the output lines will be

determined by the fitting of the pullup resistors.

Figure 3.10 shows the positions of these placeholders on the main board

assembly.

Follow the instructions of the service manual for your radio on removing

and fitting the radio lid, the main board assembly, and SMD components.

For any I/O line, exactly one pullup resistor must be fitted. To change the

pullup option it is recommended to move the factory-fitted pullup resistor

to the desired location.

If you require a different pullup resistance value, remove the factory-fitted

resistor and fit your own in the desired location. The current through the

pullup resistor must not exceed 5mA when the output is low. For example,

the value of a pullup resistor to 5V must be >1kΩ.

Table 3.8 Placeholder pullup resistors

Output line 3.3V pullup 5V pullup 13.8V pullup

AUX_GPIO4 R7691

1. Factory default.

R778 R782

AUX_GPIO5 R7701R779 R783

AUX_GPIO6 R7711R780 R784

AUX_GPIO7 R7721R781 R785

Figure 3.10 Positions of placeholder pullup resistors on main board assembly

top side

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Programmable I/O Lines 73

Special Purpose

Outputs AUX_GPIO4 can be used as a general purpose output with normal drive

levels, or it can be configured as a high current sink output capable of

directly driving external devices. To configure high current sink, a high

power transistor must be soldered to the main board assembly. For more

information refer to “Connecting an External Alert Device” on page 129.

Momentary or

Latching Output signals are latching or momentary, depending on their function.

Examples: ‘Control Status Rx (Line 1 to 3)’ is always latching. Most of the

other output signals are momentary. ‘F1 to F4 Key Status’ can be either

latching or momentary.

Power-Up

Considerations During power-up of the radio, any I/O lines configured as outputs are in an

uncontrolled and high-impedance state. The pullup resistors have a

dominant effect and thus all outputs will appear as if they are indicating logic

high during this period.

The radio will not actively control these lines for up to 1 to 2 seconds after

power is first applied, or the radio has been switched on. It is therefore

important to consider how this will affect application circuitry interfaced to

the radio, and to take measures to manage what happens during this

transition.

Defining the active state of the outputs as logic low may provide suitable

protection, as outputs will appear inactive during radio power-up. In other

cases it may be necessary to buffer the outputs with suitable circuitry to

isolate application circuits from the radio signals during this transition.

Output Signals Table 3.9 gives a brief description of the output signals available for

programming of the digital output lines, and indicates whether the output

signals are valid for conventional radio systems, trunked radio systems, or

both.

Note The Mode column refers to the Mode field on the Programmable

I/O form.

Figure 3.11 Momentary and latching output signals

input

output

(momentary)

(latching)

74 Programmable I/O Lines TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

Following the table are more detailed notes on each output signal.

Table 3.9 Digital output signals

Output

action Mode Description

“Busy Status”

on page 77

Conventional Activates the output line when the radio detects a

carrier signal (the busy detect LED indicator is on).

When the carrier ends, the line will deactivate.

“Call Setup

Status” on

page 84

Conventional Activates the output line when a call is set-up

(monitor opens due to a sequence sent or received).

When monitor closes, the line will deactivate.

“Channel

Locked

Status” on

page 79

All /

Conventional /

Trunked

Activates the output line when the radio displays

OL (the synthesiser is out-of-lock). This means the

radio cannot transmit due to being out of band,

and can indicate hardware failure. When the radio

is able to transmit on a channel, the line will

deactivate.

“Control

Status Rx

(Line 1 to 3)”

on page 85

Conventional Activates the output line when a Selcall sequence is

received that contains a control status set to

Activate Digital Line (after the Digital Line Control

Status Delay). The line will deactivate when a

control status is received set to Deactivate Digital

Line.

“CTS Control

(DCE)” on

page 89

Conventional Sets the output line on the radio for hardware flow

control (handshaking) while in conventional mode.

DCE stands for data communication equipment,

and refers to the radio. The radio activates this line

to indicate that it is ready to receive serial data from

the Data Terminal Equipment (DTE). Compare with

the input RTS Control (DCE). If this action is

assigned to a pin, the CTS field (Data form) will be

automatically updated.

“External

Alert 1 and

2” on page

All /

Conventional /

Trunked

Activates one or both output lines (in a

programmed pattern and after a programmed

delay) when certain call types are received. In

conventional mode, this applies to Selcall or two-

tone calls received with External Alert 1 or External

Alert 2 programmed. In trunked mode, this applies

to call types that are selected on the MPT Alerts

form > External Alerts tab. The line will deactivate

and stay deactivated when the call is answered, or

the programmed duration expires.

“F1 to F4 Key

Status” on

page 87

All /

Conventional /

Trunked

Activates the output line when the function key is

pressed. Select the Signal State as Momentary or

Latching, and assign the Action Digital Output Line

option to the function key on the Key Settings

form. The line will deactivate when the key is

released (momentary), or pressed a second time

(latching).

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Programmable I/O Lines 75

“FFSK Data

Received

Status” on

page 88

Conventional Activates the output line at the beginning of a valid

fast frequency shift keying (FFSK) data reception.

The line will deactivate when the data is no longer

valid (for example, the signal has ended).

“Hookswitch

Status” on

page 83

All /

Conventional /

Trunked

Activates the output line when the microphone is

removed from the hookswitch. When the

microphone is placed back on the hook, the line

will deactivate.

“Monitor

Status” on

page 83

Conventional Activates the output line when monitor is open,

due to a call setup, a function key press, the menu,

or a PTT press. When monitor closes, the line will

deactivate. If monitor opens when the microphone

is removed from the hook (Hookswitch Monitor),

the line will not be asserted.

No Action All /

Conventional /

Trunked

The radio will not activate the output line, unless

the output is selected for an input pin’s Mirrored To

field.

“On Data

Traffic

Channel” on

page 83

Trunked Activates the output line when the radio is on a

traffic channel and ready to send or receive data.

The line will deactivate when the call ends.

“Public

Address

Status” on

page 81

Conventional Activates the output line when the radio is in public

address mode and a PTT is active (pressed). The line

will deactivate when the PTT is no longer active

(released). If using the Tait Public Address options

board, this action must be assigned to IOP_GPIO2,

and Active set to high.

“Radio Has

Service” on

page 77

Trunked Activates the output line when a the radio has

service and is able to communicate with the

network. The line will deactivate if the radio loses

service (the service symbol is flashing).

“Radio Idle”

on page 84

Trunked Activates the output line when the radio is idle and

ready to accept an incoming or outgoing call

request. The line will deactivate when the radio is

no longer idle (for example, is involved in a call).

“Radio On

Traffic

Channel” on

page 83

Trunked Activates the output line when the radio is on a

voice or data traffic channel. The line will deactivate

after the call ends.

“Radio

Ready” on

page 90

All /

Conventional /

Trunked

Activates the output line when the radio is powered

up and fully initialised in either conventional mode

or trunked mode. The line will deactivate when the

radio powers down, or during a change of mode.

Table 3.9 Digital output signals (Continued)

Output

action Mode Description

76 Programmable I/O Lines TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

“Radio

Stunned” on

page 86

All /

Conventional /

Trunked

Activates the output line when the radio is stunned,

and deactivates the line when the radio is revived.

In conventional mode, the radio is stunned when a

Selcall call is received that contains a control status

set to Full Stun or Tx Stun, and is revived when a

control status is received that is set to Revive. Stun

and revive is not valid in trunked mode for this

release.

“Radio

Transmission

Status” on

page 78

All /

Conventional /

Trunked

Activates the output line when the radio is

transmitting. The line will deactivate when the radio

ends RF transmission.

“Ready For

NPD” on

page 89

Trunked Activates the output line when the radio is able to

set up a data call, or is on a data traffic channel.

The line will deactivate when the radio is unable to

transmit data over-the-air from the terminal

equipment (for example, during a hunting or a call

setup procedure).

“Reflected

PTT Inhibit

Status” on

page 81

Conventional Activates the output line when the current PTT is

inhibited (according to the settings on the PTT

form). The line will deactivate when the PTT is no

longer inhibited.

“Reflected

PTT Status”

on page 79

All /

Conventional /

Trunked

Activates the output line when a PTT is active. This

applies to any PTT with the PTT State is Reflected

check box selected. When the PTT is released, the

line will deactivate.

“Reflect THSD

Modem

Status” on

page 82

Conventional Activates the output line whenever the THSD

modem has been activated, and the radio is in

THSD transparent mode. The radio can enter THSD

transparent mode via the programmable input

Activate THSD Modem, the Powerup State, or a

CCDI command. The line will deactivate when the

radio exits THSD transparent mode.

“Serial Data

Tx In

Progress” on

page 89

Conventional Activates the output line whenever the radio is

transmitting serial data. This does not apply to GPS

data sent via the GPS Port. This option can be used

with the Line Interface board to provide RS 485

support. The line will deactivate when the radio

stops transmitting data via the TXD line.

“SIBT

Received” on

page 86

Conventional Activates the output line when a single in-band

tone is detected as valid on a channel. The line will

deactivate as soon as the carrier ends.

“Signalling

Audio Mute

Status” on

page 82

Conventional Activates the output line when valid traffic is

detected. If there is no subaudible or selective

signalling on a channel, then activity detected is

always valid and the line asserted. The line will

deactivate when the audio mute closes.

Table 3.9 Digital output signals (Continued)

Output

action Mode Description

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Programmable I/O Lines 77

3.2.1 Busy Status

Application This output signal is used to reflect the busy status, i.e. whether or not the

receiver detects an RF carrier (busy detect LED is on). The detection of the

RF carrier can be based on either signal strength (RSSI) or noise level.

This allows the radio to wake up a receiving modem or start voice recording

(for example).

Note The detection method can be set in the Squelch Detect Type field

of the Networks / Basic Settings form (Basic Networks Settings

tab) of the programming application. For more information refer

to the online help of the programming application

Configuration Configure an output line and associate it with this action. Set the active state

to be high or low (as required).

Timing The response time of this output line is <5 ms for signal strength (RSSI), and

<20ms for noise level.

Description When the radio detects a change in the state of the busy-detect circuitry, the

radio sets the state of this output line to reflect the busy detect state. When

‘busy’, the output line is active. When ‘not busy’, the output line is inactive.

Related Actions An indication of received signal strength is available from the RSSI output.

The ‘Signalling Audio Mute Status’ output signal indicates that a signal is

being received which also has valid signalling.

3.2.2 Radio Has Service

Application Activates the output line when a the radio has service and is able to

communicate with the network. The line will deactivate if the radio loses

service (the service symbol is flashing).

Configuration Configure an output line and associate it with this action. Set the active state

to be high or low (as required).

Related Actions This is the MPT equivalent of “Busy Status” on page 77.

78 Programmable I/O Lines TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

3.2.3 Radio Transmission Status

Application This output signal indicates whether the radio is in transmission mode.

This can be used

■with external modems as a gate for the start of data transmission

■with external applications, instead of looking at the PTT status, in order

not to interrupt a transmission by the user

■to switch scramblers from receive to transmit

Configuration Configure an output line and associate it with this action. Set the active state

to be high or low (as required).

Timing Rx to Tx: The GPIO output changes state 4.0+/-0.5msec before radio

reaches 90% Tx power output.

Tx to Rx: The GPIO output changes state 7.5+/-0.5msec after Tx power

output falls to -10dBm.

Description When the radio starts an RF transmission, this output line is activated.

When the radio stops the RF transmission, this output is deactivated.

While the ‘Toggle TX RF Inhibit’ input line is active, the RF output will

be inhibited, but the radio stays in transmit mode (refer to “Toggle Tx RF

Inhibit” on page 53). The ‘Radio Transmission Status’ input line is not

affected by the ‘Toggle TX RF Inhibit’ input line.

Related Actions The ‘Reflected PTT Inhibit Status’ output signal reports transmission

requests via any of the PTT input signals.

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Programmable I/O Lines 79

3.2.4 Channel Locked Status

Application This output signal is used to indicate the frequency lock status of the

synthesizer and is constantly activated during normal operation. The output

is deactivated if the radio synthesizer is unable to “lock” to the current

channel frequency, which can be caused by a hardware fault.

The deactivation of this output always coincides with the “OL” (out of

lock) control head display.

Note During channel change, although the synthesizer has to re-syn-

chronise with the new channel frequency, this output will not be

temporarily deactivated.

Configuration Configure an output line and associate it with this action. Set the active state

to be high or low (as required).

Timing The maximum time out of lock before this action is activated (e.g. during

channel change) is 50ms.

Description When the radio detects a change of the synthesizer lock detect state, the

radio sets the state of this output line to reflect the lock detect state. When

the synthesizer is locked, the output line is active. When the synthesizer is

not locked, the output line is inactive.

Related Actions None.

3.2.5 Reflected PTT Status

Application This action is used to report the PTT status by generating a logic OR of all

PTT sources programmed to reflect their status. The priority does not affect

the logic OR.

Configuration 1. In the PTT form, configure the ‘PTT State is Reflected’ check box

for each PTT type.

2. In the Programmable I/O form, configure an output line and

associate it with this action. Set the active state to be high or low (as

required).

Timing The response time of this output line is less than 2ms.

Description When the radio detects a change in PTT state, it sets the state of this output

line to reflect the PTT state. When any PTT state changes to active, the

output line is active. When all PTT states change to inactive, the output line

is inactive.

Related Actions The external PTTs can be monitored directly by the external application.

80 Programmable I/O Lines TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

3.2.6 External Alert 1 and 2

Application These two output signals are used to indicate the reception of a call to an

externally connected device. The alert can be programmed to occur for

specific call types.

The AUX_GPIO4 line of the auxiliary connector can be fitted with a power

MOSFET in order to connect signal indicators directly to the radio

(e.g. flashing light, buzzer, horn relay). With the other GPIO lines, if no

power MOSFET is fitted to the AUX_GPIO4 line, the signal characteristics

specified in “Description of the Radio Interfaces” apply.

Two different external alert types (external alert 1 and 2) can be specified,

and either none, external alert 1, external alert 2 or both can be activated.

For more information on external alerts refer to the online help of the

programming software.

Configuration 1. If you want to connect to an external alert device such as horn or

lights relay, follow the instructions in “Connecting an External Alert

Device” on page 129.

2. Configure AUX_GPIO4 (when connection to an external alert

device) or any other output line and associate it with this action.

Set the active state to be high or low (as required).

3. On the Alerts form, configure external alert 1 and/or 2 (delay,

duration, mode).

Note When programming this output line for TM8200 radios, the

‘Mode’ field can be used to define different ring patterns and

assign priorities for each call type.

Timing The timing of the external alert signal activation and deactivation is

determined by the settings in the programming application.

Description When the radio receives a call (individual call 1 or 2, priority call, group call

or emergency call), which goes unanswered for the specified amount of

time, the radio indicates the incoming call to the external device via the

output line according to the currently programmed settings for the call alert

function.

When the call is answered (i.e. external PTT activated or PTT pressed), the

radio will stop indicating the incoming call to the external device.

Note Once the external alert function has been configured, it has to be

manually activated by the user (via function key or radio menu),

or the line will not activate when a call is received. If the radio is

powered off then on again, the user has to activate the external

alert function again.

Related Actions None.

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Programmable I/O Lines 81

3.2.7 Public Address Status

Application Activates the output line when the radio is in public address mode and a

PTT is active (pressed).

The line will deactivate when the line is no longer active (released).

Configuration Configure an output line and associate it with this action. Set the active state

to be high or low (as required).

Note If using the Tait Public Address Board, this action must be assigned

to IOP_GPIO2, and Active set to high.

Timing The response time for both activation and deactivation is approximately 2ms

plus debounce time.

Description When the radio is in Public Address mode, the radio PTT state changes from

off to on (caused by highest priority PTT), and the nominated output line

is activated.

When the radio exits Public Address mode, or when the radio PTT state

changes back to off, the output line is deactivated.

Related Actions None

3.2.8 Reflected PTT Inhibit Status

Application This output signal is used to report the current PTT inhibit status by

generating a logic OR of all PTT sources programmed to reflect their status.

The priority does not affect the logic OR.

Configuration 1. In the PTT form, configure the ‘PTT Inhibit State is Reflected’

check box for each PTT type.

2. In the Programmable I/O form, configure an output line and

associate it with this action. Set the active state to be high or low (as

required).

Timing The response time of this output line is less than 2ms.

Description When the PTT inhibit status changes from on to off, or from off to on, this

status is reflected on the output line.

Related Actions The ‘Inhibit PTT’ input signal is used to stop any current PTT

transmissions, return to receive state and inhibit any further PTT

transmission requests.

82 Programmable I/O Lines TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

3.2.9 Reflect THSD Modem Status

Application Asserts the output line whenever the THSD modem has been activated, and

the radio is in THSD transparent mode. The radio can enter the THSD

transparent mode via the programmable input ‘Activate THSD Modem’,

the Powerup State, or a CCDI command. The line will deactivate when the

radio exits THSD transparent mode.

Configuration 1. In the Programmable IO form select the Digital tab.

2. Select a GPIO pin which is to reflect the state of THSD activity

3. Set the Direction field to Output.

4. Set the Action field to Reflect THSD Modem Status.

5. Set the Active output state to either High or Low.

Timing The output is asserted within 1ms of entering THSD transparent mode.

Description When configured to Reflect THSD Modem Status, the output line will go

to the selected Active state when THSD transparent mode is entered. The

output line will go back to its inactive state when THSD transparent mode

is exited.

Related Actions None

3.2.10 Signalling Audio Mute Status

Application This output signal is used to indicate valid traffic on a channel (e.g. to

quieten a car stereo).

Configuration Configure an output line and associate it with this action. Set the active state

to be high or low (as required).

Timing The response time of this output line is less than 2ms.

Description If the radio receives a carrier and either signalling is valid or the monitor is

active, this output line becomes active.

If the radio receives a carrier, and the channel is not programmed to have

signalling, this output line becomes active.

Any condition that would cause audio mute to close will cause deactivation

of this signal.

Related Actions The ‘Busy Status’ output signal also detects the carrier but ignores signalling.

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Programmable I/O Lines 83

3.2.11 Radio On Traffic Channel

Application Activates the output line when the radio is on a voice or data traffic channel.

The line will deactivate after the call ends.

Related Actions This is the MPT trunked equivalent of “Signalling Audio Mute Status” on

page 82.

3.2.12 On Data Traffic Channel

Application Activates the output line when the radio is on a traffic channel and ready to

send or receive data. The line will deactivate when the call ends.

Related Actions “Radio On Traffic Channel” on page 83

3.2.13 Monitor Status

Application This output signal is used to indicated the state of the monitor function.

This allows an external application to determine whether the user has

activated the monitor.

Note This output line only indicates the monitor function and not the

hookswitch monitor function.

For more information on the monitor function refer to the user guide and

the online help of the programming application.

Configuration Configure an output line and associate it with this action. Set the active state

to be high or low (as required).

Timing The response time of this output line is less than 2ms.

Description When the radio detects a change in state of the monitor function, the radio

sets the state of this output line to reflect the state of the monitor function.

When monitor is active, the output line is active. When monitor is inactive

the output line is inactive.

Related Actions The ‘Hookswitch Status’ output signal indicates the state of the hookswitch.

3.2.14 Hookswitch Status

Application This output signal is used to indicate the state of the hookswitch.

Configuration Configure an output line and associate it with this action. Set the active state

to be high or low (as required).

84 Programmable I/O Lines TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

Timing The response time of this output line is less than 2ms.

Description When the radio detects a change in state of the hookswitch, the radio sets

the state of this output line to reflect the state of the hookswitch. When the

hookswitch is off the hook, the output line is active. When the hookswitch

is on the hook, the output line is inactive.

Related Actions None.

3.2.15 Call Setup Status

Application This output signal is activated when the radio is busy in a voice call.

It remains active as long as the call is in progress, and may be used to trigger

an application such as a voice recorder, or to quieten external audio

equipment during the call.

Configuration 1. Configure an output line and associate it with this action. Set the

active state to be high or low (as required).

2. Configure the Monitor function to activate on both call reception

and call initiation. Set the Monitor Auto-Quiet timer to minimise the

chance of turning the Monitor off in the middle of a call.

Timing The call setup status signal will respond within 2ms of monitor activation

during call setup or reception.

Description This output signal is activated when the monitor function is activated by

either a call setup or call reception.

The signal will be deactivated when the call is finished i.e. when the monitor

is deactivated again due to auto-quiet tomato or reset signalling.

Note The monitor function does not get activated if the call is deter-

mined to be non-voice e.g. contains a control status.

Related Actions None.

3.2.16 Radio Idle

Application Activates the output line when the radio is idle and ready to accept an

incoming or outgoing call request. The line will deactivate when the radio

is no longer idle (for example, is involved in a call).

Configuration Configure an output line and associate it with this action. Set the active state

to be high or low (as required).

Related Actions This is the MPT equivalent of “Call Setup Status” on page 84.

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Programmable I/O Lines 85

3.2.17 Control Status Rx (Line 1 to 3)

Application These three output signals indicate that a call has been received which

contains a pre-defined status code, causing the signal to either activate or

deactivate. Up to three separate signals may be defined, each having unique

activation and deactivation status control codes.

These outputs may be used in Simple Telecommand type systems to

remotely control application devices by radio command. Example

applications might include remote activation or deactivation of outstation

equipment (beacons, pumps, generators etc.) from a central control point.

Configuration 1. Set up the radio to operate with Selcall on the intended operating

channel.

2. Set an alert and/or a delay (in Detailed tab of the Selcall / Selcall

Identity form).

3. Define the required control status values to activate and deactivate the

desired control status signal (in the Selcall / Control Status form). For

TM8200, define alpha labels in the Status Labels form.

4. Configure an output line and associate it with this action. Set the

active state to be high or low (as required).

Note The signal state of this signal can be set to latching only.

Timing The control status signal will respond within 2ms of receiving the last digit

of the call sequence. If an alert and/or delay is configured, 500 ms for the

alert and/or the programmed delay will be added to the response time.

Description The output signal is activated upon reception of a valid Selcall sequence

containing the pre-defined control activation status value.

The signal remains active until another valid Selcall sequence is received

which contains the pre-defined control deactivation status value.

Related Actions None.

86 Programmable I/O Lines TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

3.2.18 SIBT Received

Application This output signal indicates reception of a defined audio band (single in-

band) tone.

This signal might be used to alert an application device to the presence of a

pilot tone prior to other traffic being received.

Configuration 1. Set up the radio to operate with single in-band tone signalling on the

intended operating channel.

2. Configure the single in-band tone parameters: tone frequency,

minimum duration, and tone hold time

3. Configure an output line and associate it with this action. Set the

active state to be high or low (as required).

Timing The output signal response time is dominated by the settings of minimum

tone duration and tone hold time.

Note The detection response time may lengthen if the S/N of the

incoming signal is poor.

Description This output signal is activated once the presence of the pre-defined in-band

tone has been detected for the configured minimum duration.

The signal will remain active until the tone has not been detected for the

duration of the configured tone hold time.

Related Actions None.

3.2.19 Radio Stunned

Application This output signal is used to indicate whether the radio has been stunned by

receiving a Selcall containing a control status set to full stun or Tx stun. This

can be used to indicate to external applications that the radio is unusable, or

it can be used to control an external device to disable other equipment.

Configuration Configure an output line and associate it with this action. Set the active state

to be high or low (as required).

Timing The response time of all output lines is less than 2ms after the last tone in

the sequence was received.

Description When the radio becomes stunned, this output line becomes active.

When the radio is revived, this output line becomes inactive.

Related Actions None.

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Programmable I/O Lines 87

3.2.20 F1 to F4 Key Status

Application These output signals are used to reflect the press of function keys on the

control head. The actions can be programmed to be either:

■momentary – reflects the state of the function key (active when the

function key is pressed, inactive when the function key is released)

■latching – one short press of the function key activates the output line,

which then stays active until next short press of function key

These signals allow user interaction with an application device.

Configuration 1. Program any function to the function key (including ‘None’).

The function key LED will reflect the function key state.

Note If the function key is programmed to ‘None’ and an output line

has been configured to reflect the function key state, the LED

associated with this function key will not be affected.

2. It is recommended that the key be configured to Action Digital

Output Line (Key Settings form), in order for the corresponding LED

to reflect the key status.

3. Configure an output line and associate it with this action. Set the

active state to be high or low (as required).

4. Configure the signal state to be either momentary or latching.

Timing The response time of this output lines is less than 50ms.

Description When the relevant function key is pressed, the output line becomes active.

Depending on the programmed mode, the output line remains active until

the function key is released (momentary) or until the next key press

(latching).

Related Actions The ‘Simulate F1 to F4 Key’ input signals are used to simulate the press of

function keys on the control head. Both short and long key presses can be

simulated.

The ‘Toggle F1 to F4 Key LED’ input signals are used to turn the LEDs of

the control head on and off for display purposes, e.g. for key functions that

have no LED assigned.

88 Programmable I/O Lines TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

3.2.21 FFSK Data Received Status

Application This output signal indicates that the internal 1200 baud modem is detecting

valid FFSK signalling i.e. indicating data reception.

This signal might be used to alert application devices to the presence of data.

Configuration 1. Configure the radio to expect FFSK data. On the Data form, check

either the CCDI Options/Transparent Mode Enabled checkbox or

the SDM Options/SDM Enabled check box.

2. Configure an output line and associate it with this action. Set the

active state to be high or low (as required).

Timing The output will indicate the presence of FFSK data within 2ms of the

preamble/sync sequence being successfully decoded. Note that the

preamble/sync sequence is 32 bit periods long (approximately 27ms

duration).

The output will indicate the absence of FFSK once the channel is no longer

busy.

Description The output is activated when the radio successfully decodes an FFSK

preamble/sync sequence.

Important The output will remain active as long as the channel

remains busy (even if FFSK signalling disappears) and will

become inactive once the incoming transmission ceases.

Related Actions None.

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Programmable I/O Lines 89

3.2.22 CTS Control (DCE)

Application Sets the output line on the radio for hardware flow control (handshaking).

DCE stands for data communication equipment, and refers to the radio. The

data terminal equipment (DTE) activates this line to indicate that it is ready

to send serial data from the radio.

Note If this action is assigned to a pin, the CTS field will be automati-

cally updated.

Configuration 1. Configure Serial Communications - Flow Control in Command

Mode and/or Transparent Mode for “Hardware”.

2. Select Hardware Flow Control I/O Pins for both CTS (DCE) and

RTS ( DCE).

3. Configure Active Low/High for RTS and CTS.

4. Configure Debounce Time for RTS and CTS.

Timing Not applicable

Description The radio activates the CTS control line (DCE) to indicate the third party

device (DTE) that it is ready to receive serial data on the associated RXD

line of the radio.

Related Actions ‘RTS Control (DCE)’ sets the input line on the radio for hardware flow

control.

3.2.23 Ready For NPD

Application Activates the output line when the radio is able to set up a data call, or is on

a data traffic channel. The line will deactivate when the radio is unable to

transmit data over-the-air from the terminal equipment (for example,

during a hunting or a call setup procedure).

Related Actions This is the MPT trunked equivalent of “CTS Control (DCE)” on page 89.

3.2.24 Serial Data Tx In Progress

Application Sets the output line active when sending data out of the serial port. This can

be used to control simplex RS485 and RS422 drivers.

Configuration Configure an output line and associate it with this action.

Timing The output line will become active 2ms before the data is sent.

90 Programmable I/O Lines TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

Description Sets the output line active for data to transmit over serial port. Becomes

inactive when data is no longer available to send.

Related Actions Used for CCDI/CCR control in two-wire simplex mode.

Note Simplex control may miss data due to nature of action.

3.2.25 Radio Ready

Application Activates the output line when the radio is powered up and fully initialised

in either conventional mode or trunked mode.

Configuration Configure an output line and associate it with this action.

Timing The output line will become active when the radio is fully initialised.

The line will deactivate when the radio powers down, or during a change

of mode.

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Programmable I/O Lines 91

3.3 Audio Tap In and Tap Out Lines

This section describes the general design principles for use of the

programmable audio tap in and tap out lines.

Audio Tap Point

Philosophy The radio provides the ability to input and output audio at various tap points

in the transmit and receive audio paths. This removes the need of tapping

wires into the circuitry of the radio. The tap points and the type of tap are

programmed into the radio and cannot be modified by the radio user.

Available Audio

Tap In and Tap Out

Lines

The following lines are available to tap into and tap out of the audio paths:

For details on the connector pin-outs and electrical characteristics of these

lines refer to “Description of the Radio Interfaces” on page 13.

Input/Output

Circuitry Figure 3.12 shows a simplified circuit diagram of the audio tap in and tap

out lines. Protection circuits are not shown.

The signal source for the audio tap out line comes from the DSP audio path

(refer to Figure 3.14 for details) and is fed to a digital to analog converter at

48000 samples per second. The converter output is low pass filtered at

12kHz to remove alias components and fed to a buffer amplifier. The buffer

amplifier output is DC coupled to the AUD_TAP_OUT line and has a DC

offset of nominally 2.3V. The DC offset is affected by Rx carrier frequency

error for taps R1, R2 and R4. Full scale output level is nominally 4Vp-p

with no load (for more information refer to “Auxiliary Connector” on

Table 3.10 Audio tap in and tap out lines

Signals Connector Direction

AUD_TAP_IN auxiliary connector

internal options connector

input only

AUD_TAP_OUT auxiliary connector

internal options connector

output only

Figure 3.12 Audio tap input and output - simplified circuit diagram

digital-to-

analog

converter

12kHz

LPF buffer

600

AUD_TAP_OUT

DSP

audio

path

analog-

to-digital

converter

22kHz

LPF AUD_TAP_IN

DSP

audio

path

3.3V

220k

180k

4.3V

2.3V

0.3V

Full-scale output level

(no load)

2.5V

1.5V

0.5V

Full-scale input level

3.7Hz

HPF

92 Programmable I/O Lines TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

page 19). The buffer amplifier has an output impedance of nominally 600Ω

that is constant across frequency.

The audio tap in line is also DC-coupled. A DC bias network provides a bias

of nominally 1.5V. The valid DC input signal range is 0.5 to 2.5V nominally

regardless of bias voltage. Therefore, to avoid asymmetrical clipping and

reduced dynamic range, it is important that the input bias voltage is

preserved when driving the input. This can be achieved by simply AC-

coupling the drive signal. For data applications, DC-coupling may be

desirable so, in this case, the driver must provide a DC bias signal as close as

possible to 1.5V. After input biasing, the AUD_TAP_IN signal is fed to a

switched capacitor high-pass filter with a cut frequency of 3.7Hz.

This prevents the DC bias affecting the transmitter carrier frequency.

The high-pass-filtered signal is then low-pass-filtered to prevent aliasing,

and sampled by an analog-to-digital converter at 48kHz. The analog-to-

digital converter output is then fed to the DSP audio path (refer to

Figure 3.14 for details)

For some applications, such as a crossband link or fitting an encryption

module, it is necessary to connect the audio tap out line to the audio tap in

line. The two are not directly compatible but can be made so using a simple

external coupling network as shown in Figure 3.13.

The 600Ω shunt resistor reduces the maximum level of audio tap out to

nominally 2Vp-p to match the maximum input level of audio tap in.

The coupling capacitor removes the DC offset. For voice applications,

CCshould be at least 100nF. If high-speed baseband data modulation

throughput is required, CC of at least 4.7µF is recommended. The CC

capacitor should be a non-polarised type.

Figure 3.13 Connecting audio tap out and audio tap in

buffer

600 AUD_TAP_OUT

3.3V

220k

180k

3.7Hz

HPF

600

CcAUD_TAP_IN

radio external radio

coupling

network

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Programmable I/O Lines 93

Audio Paths Figure 3.14 shows a simplified block diagram of the receive and transmit

audio paths, the locations of the tap points available, and the tap types.

Audio

Configuration The audio configuration consists of the following elements:

■audio source associated with each PTT (CH_MIC_AUD,

AUX_MIC_AUD, AUD_TAP_IN)

■Rx/PTT type (Rx, Mic PTT, EPTT1, EPTT2)

■tap out point (R1, R2, R4, R5, R7, R10, T3, T4)

■tap out type (C-Bypass Out, D-Split, E-Splice)

■tap out unmute condition

■tap in point (T3, T4, T5, T8, T9, T12, T13, R7, R10)

■tap in type (A-Bypass In, B-Combine, E-Splice, H-Combine 0dB)

■tap in unmute condition

Audio Source For each PTT (Mic PTT, EPTT1 and EPTT2) a different audio source can

be selected. These audio sources are CH_MIC_AUD, AUX_MIC_AUD

and AUD_TAP_IN.

Note You can allocate an audio tap input at the same time as a micro-

phone input by setting the audio source for a PTT to

CH_MIC_AUD or AUX_MIC_AUD, and defining a tap in and

out point for the same PTT. However, audio samples from the

audio tap input will overwrite those from the microphone input,

unless the tap in type and tap out type are set to ‘Combine’.

Figure 3.14 Receive and transmit audio paths - simplified block diagram

receiver deviation

demodulator

output

300Hz de- future

processing

option

normaliser

3kHz

LPF HPF emphasis

audio to

volume

control

audible

indicators

R10R7R5R4R2R1

audio to dev.

transmitter

modulator

future

processing

option

scaler

ALC

mic

audio

T3T5T8T12T13

future

processing

option

Key:

tap point (tap in or tap out)

LPFlow-pass filter

HPFhigh-pass filter

ALCauto level controlled

receive audio path

transmit audio path

and speaker

type A type B type C type D type E

tap types:

Combine Bypass Out Split SpliceBypass In

300 Hz

HPF

pre-

emphasis

LPF limiter

3kHz

94 Programmable I/O Lines TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

Rx/PTT Type The radio can be programmed to tap into and out of the respective audio

path when the radio is receiving or transmitting (initiated by one of the

PTTs).

Tap Out and Tap In

Points and Types Table 3.11 lists the available tap points and the tap types available for them.

The tap points and tap types are illustrated in Figure 3.14.

Select a tap out point to feed audio to an application device, and a tap in

point to feed audio from an application device.

Important Do not use ‘Bypass Out’ on R1, R2 and R4 with subaudi-

ble or inband signalling schemes, as this may prevent correct

operation of the signalling decoder.

The same tap point can be selected for both tap in and tap out. This is

referred to as a ‘Splice’ tap type as it allows an audio processing device to be

inserted into the radio’s audio path. This tap type is primarily used for

encryption applications (refer to “Encryption Module (Scrambler)” on

page 119).

The ‘Combine’ tap type is intended for the injection of sidetone beeps into

the Rx path.

Important Modifications to radio-frequency transmitting equipment

can void the user's authority to operate the equipment.

By distributing the TM8000 3DK Hardware Developer’s

Kit, Tait Electronics Limited. does not accept liability for

any non-compliance or infringement of intellectual prop-

erty rights resulting from the application or use of this kit

or information. Any person modifying Tait radio-fre-

quency transmitting equipment is responsible for ensuring

that the modified equipment meets all legal and regulatory

requirements in the country of use or supply.

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Programmable I/O Lines 95

Note If a tap type is set to ‘Splice’, then the corresponding tap in or tap

out type must also be set to ‘Splice’. Both tap points and both

unmute conditions must also be identical.

Tap In and Tap Out

Unmute For the Rx path, the settings for unmuting the tap in and the tap out points

are:

■Busy Detect

■Busy Detect and Subaudible

■Rx Mute Open

■Except on PTT (not available for tap type E - Splice)

For all PTT types, the only setting for unmuting the tap in and the tap out

points is On PTT

Applications For application examples refer to:

■“External Modem” on page 110

Table 3.11 Tap out points and tap out types

Rx/PTT type Tap in

points

Tap i n

types

Tap out

points

Tap out

types

Rx R7 E - Splice R1 C - Bypass Out

D - Split

R10 A - Bypass In

B - Combine

R2 C - Bypass Out

D - Split

R4 C - Bypass Out

D - Split

R5 C - Bypass Out

D - Split

R7 C - Bypass Out

D - Split

E - Splice

R10 C - Bypass Out

D - Split

PTT, EPTT1, EPTT2 T3 A - Bypass In T3 C - Bypass Out

D - Split

T4 E - Splice T4 E - Splice

T5 A - Bypass In R10 C - Bypass Out

D - Split

T8 A - Bypass In

T9 A - Bypass In

T12 A - Bypass In

T13 A - Bypass In

R10 A - Bypass In

B - Combine

96 Programmable I/O Lines TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

■“Encryption Module (Scrambler)” on page 119

■“ANI Module” on page 125

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Creating Your Own Options Board 97

4 Creating Your Own Options Board

TM8100 and TM8200 radios provide space for the following options

boards:

■an internal options board inside the radio body using the internal options

connector and (optional) the hole provided for the external options

connector

■a blank control head options board (TM8105 only) between the radio

body and the blank control head using the control head connector

This chapter describes the mechanical envelopes of these options boards,

common design practices and EMC guidelines and the Internal Options Kit

available from Tait.

Important Modifications to radio-frequency transmitting equipment

can void the user's authority to operate the equipment.

By distributing the TM8000 3DK Hardware Developer’s

Kit, Tait Electronics Limited. does not accept liability for

any non-compliance or infringement of intellectual prop-

erty rights resulting from the application or use of this kit

or information. Any person modifying Tait radio-fre-

quency transmitting equipment is responsible for ensuring

that the modified equipment meets all legal and regulatory

requirements in the country of use or supply.

4.1 Internal Options Board

TM8100 and TM8200 radios provide space inside the radio body to

accommodate an internal options board.

The internal options board is connected to the internal options connector

and can also use the hole provided for the external options connector.

The internal options connector is described on page 27.

The provision for the external options connector is described on page 30.

Examples of internal options boards available from Tait:

■TMAA30-02 3DK Application Board.

Refer to the TM8000 3DK Application Board Service Manual.

■TMAA01-01 Line-Interface Board.

Refer to the TM8100/TM8200 Service Manual.

■TMAA01-05 Options Extender Board.

Refer to the TM8100/TM8200 Service Manual.

98 Creating Your Own Options Board TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

4.1.1 Mechanical Envelope

Figure 4.1 and Figure 4.2 show the mechanical envelope available for

internal options boards. Nine screw points are provided on the inside of the

lid of the radio body.

Internal options boards can be sized and shaped as required and can use any

combination of fixing parts to suit. Figure 4.3 shows an installation example.

Note Unless stated otherwise, all dimensions are given in millimetres.

Figure 4.1 Internal options board - maximum dimensions

top side

0.4

1.5

5.5

55.5

87.5

R7.5

Ø 3.5 (9x)

108

132

143

11.26

10.2

10.62

29.5 centre of connector

pin 1

42.07

26.665 centre of connector

12 centre of connector

139

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Creating Your Own Options Board 99

Figure 4.2 Internal options board - component height restrictions

1.98

1.6

1.05

1.6

6.17

11.93 31.24

44.8853.2344.88

Ø 10 (5x)

10.18

9.02 9.02

16.09

9.16

11.4

8.42

R5.16

R6.5

15.43

R6.5

15.45

10.79

9.14

11.4

8.42

44.57

70.26

44.57

70.26

18.4

15.4

32.26

9.52

42.29

66.5

14.5

46.5

60.5

110.52

126.01

86.6

Ø 7.8 (12x)

maximise ground plane over bottom side

no components on bottom side

no through-hole components

no components

max. comp. height 9.5mm

max. comp. height 6.7mm

max. comp. height

7.7mm

max. comp. height

8.2mm

unshaded areas (12x) = no routes

on top side

unshaded

areas (9x)

= no routes

throughhole

components

allowed on

top side

max. leg length

2mm from

bottom side

max. comp. height

10.7mm

max. comp.

height

7.7mm

bottom side

top side

100 Creating Your Own Options Board TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

Figure 4.3 Internal options board - installation example

D-range hexlok-style fastener 4–40 (2x)

(tightening torque 0.9N·m=8lbf·in)

screw 4-40x3/16 (2x)

protective rubber cap

foam seal for D-range connector

screw M3x10, self-tapping (9x)

loom with 18-way Micro-MaTch plugs

15-way high-density D-range socket, PCB-mount

18-way Micro-MaTch socket, SMD, PCB-mount

Important Assemble and tighten the two hexlocks (tightening torque

0.9N·m=8lbf·in) before screwing the internal options board to

the lid.

Note The labelled parts are available with the TM8000 internal options kit

described on page 101.

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Creating Your Own Options Board 101

4.1.2 TM8000 Internal Options Kit

The TM8000 internal options kit (product code TMAA30-06) includes all

special connectors, a loom, seals and screws required to connect to the

internal options connector, the external options connector and the screw

points inside the radio body.

The components of the TM8000 internal options kit, that are fitted to the

radio, are illustrated in Figure 4.3.

Table 4.1 TM8000 internal options kit - bill of material

Tait IPN Qty. Description Pos. in Figure 4.3

354-01043-00 2 Fsnr Scrw Lok 1pr 4-40 b

347-00011-00 2 Scrw 4-40*3/16 Unc P/P Blk c

362-01108-00 1 Seal Drng Cvr 9way TMA d

362-01111-00 1 Seal Drng 9way TMA E

349-02062-00 9 Scrw M3*8 T/T P/T Conti Rmnc f

219-00329-00 1 Loom TMA Int Opt G

240-00011-67 1 Skt 15w Drng Ra Slim Dsub 7912 (footprint see Figure 4.4)H

240-10000-11 1 Conn SMD 18w Skt M/Match (footprint see Figure 4.5)I

240-00010-80 1 Plg 15w Drng Hi-D not illustrated

240-06010-29 1 Conn 9w Hood/Cvr Lets not illustrated

Figure 4.4 Footprint of 15-way D-range socket, PCB-mount

Figure 4.5 Footprint of 18-way Micro-MaTch socket, SMD, PCB-mount

24.99

16.0

10.67

6112813

1015

14931271

0.762

1.524

Ø2.1

Ø3.18

1.5

2.5

Ø1.8

Ø0.8

1.8

2.0

7.29

7.03

0.13

4.6

5.1

2.8

26.2

21.6

357911131517

18161412108462

1.3

height: 8.2mm (incl. mating connector)

102 Creating Your Own Options Board TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

4.1.3 Common Practices for Internal Options Board Design

Thermal

Considerations Select components which withstand the temperatures inside the radio body,

in particular during high duty cycles and high ambient temperatures.

Tait recommends the use of industrial-grade components (<85°C).

Heat dissipation added by an internal options board can reduce the radio’s

operating temperature range or duty cycle. Keep heat dissipation to a

minimum.

Sealing The IP54 protection class no longer applies when the external options

connector or an additional connector are used. When fitting one of these

connectors, it is the integrator’s sole responsibility to provide adequate

sealing.

Electromagnetic

Compatibility It is important that the internal options board is electro-magnetically

compatible (EMC) with the radio itself and the external environment.

This means that the internal options board is not affected by and does not

interfere with the radio or the external environment. An EMC problem has

three components: a source, a coupling mechanism and a receiver.

The coupling mechanism can be conducted and/or radiated.

Key things to consider are as follows:

Susceptibility to

Interference If the internal options board has connections via the external options

connector and the radio’s antenna is located close to the options cable,

significant RF pick up on to the cable may occur.

If the internal options board contains sensitive analog circuits (particularly

microphone circuits), digital ground noise may be a problem if the internal

options board is not earthed correctly.

Electrostatic discharge (ESD) onto the options cable may cause damage to

the internal options board or malfunction if proper protection is not

provided.

Emissions from the

Internal Options

Board

The radio's receiver is extremely sensitive and radiation from the internal

options board on the desired channel frequency may cause interference.

If the internal options board has connections via the external options

connector and the radio’s antenna is located close to the cable, radiation

from the cable may be picked by the antenna as interference.

Radiation from the options cable, if strong enough, may interfere with other

devices near the radio or cause failure to comply with EMC regulations in

your country or region. The cable creates a good antenna at high

frequencies.

Follow the guidelines in “Guidelines for EMC Design” on page 103.

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Creating Your Own Options Board 103

4.1.4 Guidelines for EMC Design

Earthing Figure 4.6 and Figure 4.7 show the recommended earthing of the internal

options board. The earthing used depends on the type of circuitry on the

internal options board.

Figure 4.6 Internal options board - earthing for low-speed circuits

internal

options

connector

from PSU

from digital

from audio

to audio

radio ground plane

to digital

regulated

PSU

low-speed

digital

circuit

analog

circuit

(low freq.)

external

options

cable

13V8_SW

DGND 470p

470p

25V

470

4.7k

DVDD

AVDD

10n

470

4.7k

DVDD

AVDD

internal options board

(2 layers with no groundplane)

connector

loom

located as close to

the connector

as possible

digital

device

analog

device

AGND

digital ground

analog ground

chassis ground

screws

(earth board

to chassis)

Figure 4.7 Internal options board - earthing for high-speed circuits

regulated

PSU

high-

speed

digital

analog

circuit

(RF)

external

options

cable

13V8_SW

AGND

DGND 470p

470p

25V

470

4.7k

DVDD

AVDD

DVDD

AVDD

internal options board

(4 or more layers)

connector

loom

located as close to

the connector

as possible

digital

device

analog

circuit

470

470p

internal

options

connector

from PSU

from digital

from audio

to audio

radio ground plane

to digital

digital ground

analog ground

chassis ground

screws

(earth board

to chassis)

additional

coaxial

connector

device

104 Creating Your Own Options Board TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

For low-speed digital designs or audio designs, a two layer board with plated

through holes is usually sufficient. Low-speed digital devices have relatively

long rise and fall times, this includes standard CMOS logic gates and low

power 5V 8-bit micro-controllers. Tracked earthing is usually sufficient but

ground fill should be used where possible.

For high-speed digital designs or RF designs it is strongly recommended that

a PCB with four or more layers is used. High-speed digital devices have

short rise and fall times, this includes most Digital Signal Processors and 16/

32-bit micro-controllers. The board should have one layer reserved as a

ground plane. No signal tracks should be placed on this layer.

The internal options connector has separate analog and digital earth pins.

These are connected together on the radio PCB through a low impedance

ground plane. Separate ground signals allow digital I/O and analog ground

current to flow in different wires on the loom. This is important because the

loom wire has relatively high impedance and so significant earth noise

voltage due to digital I/O activity can be developed across the length of the

wire. Having two earth wires also halves the impedance of the earth

connection where the earths are common at the internal options board end.

On the internal options board, the earth signals can either be connected

together or kept separate and fed to the appropriate digital and analog

circuitry. For low-speed designs it is practical to keep them separate but for

high-speed design this is not usually the case, due to ground plane

requirements.

It is recommended that the internal options board is earthed to the chassis

lid as close as possible to the external options connector. This can be

achieved via the mounting screws closest to the external options connector.

For the screw hole, use a plated through hole diameter 3.5mm with pad

diameter 7mm on both sides. The resist should be cleared from the pad and

the pad connected to analog earth or the ground plane. Other mounting

screws may also be connected to the chassis lid but this is not essential.

Shielding For low-speed designs shielding is usually not necessary. For high-speed

designs shielding may be necessary. For RF designs it is usually essential.

Cable Shielding If the external options cable is longer than 1 metre it is recommended that

the cable and connector backshell be shielded. Figure 4.8 shows the

recommended shielding arrangement. The earth braid wire (bare copper)

and aluminium foil should only be earthed at the radio end of the cable.

For RF signals, coaxial cable must be used and the shield must be earthed at

both ends of the cable.

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Creating Your Own Options Board 105

Input/Output

Filtering The recommended filtering for input and output (I/O) lines from the

internal options board is shown in Figure 4.6 and Figure 4.7 on page 103.

The component values shown are for guidance but should be suitable for

most applications.

For the I/O lines to or from the radio, filtering is usually not necessary.

The exception is when the internal options board contains high-speed

digital circuits. In this case, the outputs to the radio should be RC-filtered

on the internal options board as close as possible to the connector to

minimise noise on the loom.

It is recommended that filtering is applied on all I/O signals of the external

options connector. They also need ESD protection. The filtering shown in

Figure 4.6 and Figure 4.7 on page 103 provides both ESD protection and

high frequency filtering. For the audio, 10nF capacitors are recommended

because they are large enough to keep the voltage developed by electrostatic

discharge to a safe level, while not significantly affecting audio frequency

response. The capacitors are earthed to the chassis to provide a low

impedance return path for large ESD currents. High frequency filtering is

provided by the series resistance and 10nF capacitor.

Large decoupling capacitors cannot be used for digital signals because they

round the wave form edges to an unacceptable extent. Therefore for ESD

protection, a small 470pF decoupling capacitor in parallel with a zener diode

clamp is recommended. The capacitor reduces the slew rate of the ESD

pulse so that the zener diode clamps without overshoot. Again, the capacitor

and zener diode are earthed to the chassis to provide a low impedance return

path for large ESD currents. It is also recommended that a zener diode is

placed on the digital supply, as some current will flow back into the supply

via the series resistance and digital IC clamping diodes during an ESD event.

The zener voltage should be approximately 0.5V higher than the supply

voltage. High frequency filtering is provided by the series resistance and

470pF capacitor.

It is essential that all I/O filter components are located as close as possible to

the connector. This minimises the possibility of noise bypassing the filters.

Figure 4.8 Recommended auxiliary cable and connector shielding

cable insulation

aluminium foil

earth braid wire

signal earth wire

analogue ground pin

metal backshell

metal D-range shroud in

contact with backshell

metal cable clamp

106 Creating Your Own Options Board TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

Power Supply

Decoupling Power supply decoupling is most effective when the decoupling is placed

close to the load. For high-impedance loads, some resistance in series with

the load can be beneficial. For most applications a single 100nF capacitor is

sufficient to remove high-frequency noise.

For high-speed digital designs, the use of a power plane for each digital

supply rail is strongly recommended. The power plane enables many

decoupling capacitors and device power pins to be connected together with

very low impedance. The inter-plane capacitance is usually not sufficient by

itself for decoupling. Low ESR tantalums for low-frequency decoupling are

recommended. Multiple ceramic 100nF capacitors are recommended for

high-frequency decoupling. Design analysis should be undertaken to ensure

that decoupling is effective up to at least 500MHz.

Separate power supply rails for digital and analog circuitry are

recommended.

Note High-speed digital design requires a high level of design experi-

ence, appropriate design tools and high bandwidth test equipment

to be successful. This should not be undertaken without all of the

above.

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Creating Your Own Options Board 107

4.2 Blank Control Head Options Board

The radio with blank control head provides space between the blank control

head and the radio body for accommodating an options board. Six screw

points are located on the inside of the blank control head.

Figure 4.9 and Figure 4.10 show the mechanical envelope available.

Six screw points are located on the inside of the blank control head.

Figure 4.11 shows an installation example.

Figure 4.9 Blank control head options board - maximum dimensions

43.61

149.72 max.

70.5

75.61

9.74

11.15

R5.11

33.39

5.11

Ø 3.4 clearance for M3x8 screw (6x)

pin 1 for a

placed D-range

type connector

bottom side

Figure 4.10 Blank control head options board - component height restrictions

Ø10 (6x)

10 (6x)Ø

max. component height 5.0mm

max. component height 13.0mm

max. component height 8.0mm

max. component height 6.0mm

max. component height 5.0mm

unshaded areas

= no routes

bottom side

top side

108 Creating Your Own Options Board TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

Figure 4.11 Blank control head options board - installation example

D-range hexlok-style fastener 4–40 (2x)

(tightening torque 0.45N·m=4lbf·in)

screw 4-40x 3/16 (2x)

D-range cover seal

branding label

screw M3x8 plastic type (6x)

9-way D-range socket, vertical PCB mounting

with threaded inserts on connector

foam seal for D-range connector

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Connecting Third-Party Products 109

5 Connecting Third-Party Products

This chapter describes, in examples, the connection of external and internal

products of third-party manufacturers to the TM8000 radio.

Important Modifications to radio-frequency transmitting equipment

can void the user's authority to operate the equipment.

By distributing the TM8000 3DK Hardware Developer’s

Kit, Tait Electronics Limited does not accept liability for

any non-compliance or infringement of intellectual prop-

erty rights resulting from the application or use of this kit

or information. Any person modifying Tait radio-fre-

quency transmitting equipment is responsible for ensuring

that the modified equipment meets all legal and regulatory

requirements in the country of use or supply.

110 Connecting Third-Party Products TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

5.1 External Products

5.1.1 External Modem

Data Flow Figure 5.1 shows a simple point-to-point data link system using two radios

and external modems.

1. DTE 1 transmits the source data in serial form to the external

modem 1. The DTE can be a PC or a data head.

2. The modem encodes the data into a baseband modulation signal

which is suitable for over-the-air transmission, and feeds it to radio 1.

3. Radio 1 uses the baseband modulation signal for frequency

modulation of the RF carrier signal, and then sends the modulated

signal over the air (via a repeater, if necessary).

4. Radio 2 receives the modulated signal, recovers the baseband

modulation signal from the RF carrier, and then feeds the baseband

modulation signal to external modem 2.

5. External modem 2 decodes the baseband modulation signal into serial

digital form and feeds it to DTE 2.

DTE 2 can also be the source and DTE 1 the destination, however, because

the radios are simplex, simultaneous data flow in opposite directions is not

possible.

Figure 5.1 Basic system configuration using two external modems and radios

external

modem

RF connector

auxiliary

connector

radio

DTE 1

1serial data

connector

radio

connector

DTE

connector

external

modem

RF connector

auxiliary

connector

radio

DTE 2

2serial data

connector

radio

connector

DTE

connector

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Connecting Third-Party Products 111

Interface

Specification The external modem is connected to the auxiliary connector, which is

described on page 19. For the interface specification of the external modem

to the DTE please refer to the manufacturer’s documentation.

Table 5.1 shows how to connect the lines of the external modem to the

auxiliary connector.

Table 5.1 External analog modem interface specification

External modem Auxiliary connector

Description/parameter Specification

Signal Pin Signal

Power 8 13V8_SW Power supply to modem.

Max. current draw:

Operating voltage range:

must be < 1A

9.7V to 17.2V

Ground 15 AGND Analog ground.

Baseband modulation

output

7 AUD_TAP_IN Baseband modulation to radio.

Format1:

Audio tap input point:

Audio tap input muting:

Signal level:

DC bias required:

AUD_TAP_IN input impedance:

GMSK, FFSK, 4-level FSK

1200-9600baud

Use T13-A or T12-A for GMSK/4FSK

Use T8-A for low-baud modems.

Use ‘on PTT’ associated with EPTT1

T13-A: 870mVp-p (3kHz dev.)

T12-A: 690mVp-p (60% RSD2)

T8-A: 690mVp-p (60% RSD2)

1.5±0.2V3

100kΩ typical

Baseband modulation

input

13 AUD_TAP_OUT Baseband modulation from radio.

Format:

Audio tap input point

Audio tap input muting:

Signal level into 600Ω:

AUD_TAP_OUT output impedance:

Constant envelope.

GMSK, FFSK, 4-level FSK

1200-9600baud

Use R1-D or R2-D for GMSK/4FSK

Use R4-D for low-baud modems.

Use ‘except on PTT’

R1-D: 600mVp-p (3kHz dev.)

R2-D: 690mVp-p (60% RSD2)

R4-D: 690mVp-p (60% RSD2)

600Ω typical

Push-to-talk 12 AUX_GPI1 PTT signal to radio.

Function:

Active state:

Logic output levels required:

EPTT1 or EPTT2

Low

3.3V CMOS-compatible

Carrier detect 10 AUX_GPIO4 Carrier detect. Some modems may

not need this signal.

Function:

Active state:

Modem input logic threshold

required:

Busy status based on RSSI

High

3.3V CMOS-compatible4

1. The modulation formats listed may not comply with transmit spectral emission mask regulations in some countries. It is

the integrator’s responsibility to ensure that the system complies with the relevant regulations.

2. RSD = Rated System Deviation

3. While AUD_TAP_IN is DC-coupled, it has a digital HPF in the modulation path to prevent DC bias error affecting the

transmit carrier frequency. The HPF has a –3dB point of 3.7Hz which is low enough for GMSK. If the modem cannot

provide the bias voltage required then a large coupling capacitor, typically 10µF, should be used.

4. If the modem input is 5V CMOS, the pullup output on AUX_GPIO4 should be linked to 5V. For more information refer

to “Digital Output Lines” on page 70.

112 Connecting Third-Party Products TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

Radio Programming Use the programming application to configure the radio.

1. In the Digital tab of the Programmable I/O form, carry out the

following settings:

2. In the PTT / External PTT (1) form, set the Advanced EPTT1

group to:

■PTT Transmission Type: Data

■PTT State Is Reflected: cleared

■PTT Priority: Highest

■Audio Source: Audio Tap In

3. In the Networks / Basic Settings / Basic Network Settings form,

set the Squelch Detect type to Signal Strength.

4. In the Audio tab of the Programmable I/O form, carry out the

following settings:

Tap out R1 is the tap point closest to the demodulator. Tap in T13 is

the tap point closest to the modulator. For more information on the

tap points refer to “Auxiliary Connector” on page 19 and “Audio

Tap In and Tap Out Lines” on page 91.

If not all the channels that the modem will be communicating on

have the same channel spacing or bandwidth, tap in T12 and tap out

R2 should be used. The signal levels on these taps are automatically

scaled to match the channel spacing, i.e. 3kHz deviation on a 25kHz

channel and 1.5kHz deviation on a 12.5kHz channel will result in the

same tap in and tap out signal levels.

For modems operating at 2400baud or less, tap in T8 and tap out R4

should be used. These tap points have linear-phase 3kHz low-pass fil-

tering applied.

5. All channels that the modem uses for communication should be

assigned to one network and all voice channels should be assigned to

a second network. This ensures that the data and voice channel

settings are independent of each other.

Modem

Configuration Refer to the manufacturer’s documentation.

Pin Direction Action Active Debounce Signal state

AUX_GPI1 Input External PTT1 Low 0 None

AUX_GPIO4 Output Busy Status High None Momentary

Rx /

PTT Type Tap In Tap In Type Tap In Unmute Tap

Out Tap Out Type Tap Out Unmute

Rx None R1 D - Split Except on PTT

EPTT1 T13 A - Bypass In On PTT None

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Connecting Third-Party Products 113

Setup and Testing 1. Configure the modem and DTE.

2. Test the modem and DTE configuration. The simplest means is

usually a loop-back test. For this test a loop-back plug is required.

This consists of a 15-way female plug with modem baseband

modulation in and out connected together. Disconnect the modem

from the radio and connect the loop-back plug onto the end of the

cable between modem and radio. Send a large amount of data and

check that the data received on the DTE is error-free. This test

requires the DTE to be full duplex capable and the baseband

modulation levels in and out of the modem to be equal.

3. Configure the radio as per described above.

4. Connect the modem and set up deviation levels as per the modem

manufacturer’s documentation.

5. Check that the transmit spectrum meets regulatory requirements in

the country of sale. Not necessary if tap in point T8 is used.

6. Use a second system to confirm end-to-end communication over-

the-air. Initially it is recommended to do this with strong signal

conditions.

System Delays

through the Radio It is important for data applications to know the system delays through the

radio. Table 5.2 shows the system delays through the radio.

Table 5.2 System delays through the radio

System delay through the radio Specification

EPTT assertion (zero debounce) to full carrier

power with valid modulation:

via tap T12 and T13

via tap T9

via tap T8

14.8±0.5ms

14.3±0.5ms

17.8±0.5ms

EPTT de-assertion (zero debounce) to valid

baseband modulation at AUD_TAP_OUT:

via tap R1 and R2

via R4

12.3±0.5ms

16.9±0.5ms

Modulation delay - antenna to AUD_TAP_OUT:

via tap R1 and R2

via tap R4

1.8ms typical

6.6ms typical

Modulation delay - AUD_TAP_IN to antenna:

via tap T12 and T13

via tap T8

1.8ms typical

9.6ms typical

Valid RF signal arriving at the antenna to carrier detect active: 3ms typical

114 Connecting Third-Party Products TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

5.1.2 Audio Headset

Headsets provide a private and hands-free means of using a two-way radio

and are typically used by dispatchers or users in high-noise environments.

PTT is normally provided with a foot switch.

Interface

Specification The audio headset is connected to the microphone connector of the control

head. The microphone connector is described on page 35. It can also be

connected to the corresponding lines of the programming connector of the

blank control head.

Figure 5.2 shows the diagram of an audio headset interfaced with the

microphone connector of the TM8115 two-digit display control head.

Figure 5.2 Diagram of an audio headset connected to the radio

control head

microphone

foot

connector

headset

connector

dyn. and

concealed

mic board

R11

R52

R53

C50

CH_MIC_AUD

AGND

RX_AUD

SPK–

SPK+

auxiliary

connector

switch

AUX_GPI1

AGND

TM8115

control head radio body

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Connecting Third-Party Products 115

Table 5.3 shows how to connect the audio headset to the radio:

Table 5.4 shows how to connect the footswitch to the radio:

Earphone Interface If the headset is stereo, ensure both earphones are connected in parallel.

The earphones are connected to pin 1 of the microphone connector.

As headset earphones vary widely in their impedance and power ratings, two

different driver options are available in the radios with user interfaces. If you

are unsure of the headsets drive requirements, try the factory default

hardware configuration first.

For headsets with low drive or volume requirements, the factory default

hardware configuration can be used (R52 fitted, C50 and R53 not fitted).

The earphone DC resistance in this case should be greater than 100 Ω.

For headsets with high drive or volume requirements, one of the radios

internal speaker outputs should be used to drive the earphones. To connect

an internal speaker output to pin 1 on the microphone connector, remove

R52 and fit C50 and R53 on the control head board.

Figure 5.3 on page 116 shows the positions of C50, R52 and R53 on the

control head board.

Follow the instructions of the service manual for your radio on removing

and fitting the control head, the control head board, and standard and SMD

components.

Table 5.3 Audio headset interface specification

Lines of

audio headset

Microphone

connector Description/parameter

Signal Pin Signal

Earphone Audio (+) 1 MIC_RX_AUD Audio to earpiece.

Microphone Audio (+) 5 MIC_AUD Microphone audio from headset.

Earphone Audio (–) 6 AGND Analog ground for earpiece.

Microphone Audio (–) 6 AGND Analog ground for microphone.

Table 5.4 Footswitch interface specification

Lines of footswitch Auxiliary connector

Description/parameter

Signal Pin Signal

Switch output 12 AUX_GPI1 External PTT input

Switch ground 15 AGND analog ground

116 Connecting Third-Party Products TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

Choose values for C50 and R53 as follows:

1. Measure the earphone DC resistance RE using a multimeter.

2. Choose C50 to be at least 10µF and R53 to be approximately equal

to RE.

3. Select an on-air channel with frequent voice activity and disconnect

the internal speaker.

4. Turn the volume to minimum and plug the headset into the

microphone socket.

5. Select and test the value of R53 until the desired headset volume is

achieved when the radio’s volume control is turned up to maximum.

Ensure the radio is powered down when making changes to the value

of R53.

6. Select the value of C50 to be 1/(1900·(R53+RE))

7. Round this result to the nearest preferred value.

The radio’s internal speaker should be left disconnected.

Microphone

Interface If the headset microphone is an electret type, the factory default hardware

configuration (R11 fitted) can be used. DC bias for the headset microphone

is provided by the radio. Noise-cancelling electret microphones do not

require a different configuration.

If the headset microphone is a dynamic type, the TMAA02-06 Support Kit

for Concealed and Dynamic Microphones must be fitted in the control

head. For information on how to fit this kit refer to the service manual.

Figure 5.3 Positions of C50, R52 and R53 on the control head board

bottom side

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Connecting Third-Party Products 117

PTT Interface Connect a footswitch or gear-lever PTT between AUX_GPI1 (pin 12) and

AGND (pin 15) on the radio’s auxiliary connector.

Radio Programming Use the programming application to configure the radio.

1. In the PTT /External PTT (1) form, set the /Advanced EPTT1

group to:

■PTT Transmission Type: Voice

■Audio Source: CH_MIC

2. In the Digital tab of the Programmable I/O form, carry out the

following settings:

3. To eliminate mute and unmute ‘pop’ when the earphone is driven by

an internal speaker output, the audio PA needs to be forced on.

Configure the CH_GPIO1 line as follows.

Ensure that nothing is connected to pin 8 of the microphone

connector.

Note This setting will cause the receive standby current to increase by

approximately 50mA.

Pin Direction Action Active Debounce Signal state

AUX_GPI1 Input External PTT1 Low 10 None

AUX_GPIO4 Output Busy Status High None Momentary

Pin Direction Action Active Debounce Signal state

CH_GPIO1 Input Force Audio PA On High 10 None

118 Connecting Third-Party Products TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

5.1.3 USB Adaptor

An increasing number of computers (in particular laptop computers) no

longer provide serial COM ports and instead provide USB connections.

To connect the radio to a USB port, a USB adaptor is required.

Note If the PC has a COM port, the T2000-A19 cable can be con-

nected directly to the PC without using a USB adaptor.

The PC is typically connected to the microphone connector of the control

head or to the programming connector of the blank control head. The PC

can also be connected to the auxiliary connector or, if an options extender

board is installed, to the external options connector.

The Rx and Tx signals of these connectors have TLL levels and are

described in “Description of the Radio Interfaces”. The TLL level must be

converted to RS-232 level using the Tait T2000-A19 cable. The T2000-

A19 cable does not support CTS/RTS hardware handshaking.

Figure 5.4 shows typical connections between the radio and the USB port

of the PC, and the cables and adaptors required (including Tait product

codes):

When installing the USB adaptor, follow the manufacturer’s instructions on

how to install the necessary device driver. The PC will typically see the USB

adaptor as a COM port.

Figure 5.4 Diagram of radio connected to the USB port of a PC

RJ12

TMAA20-04

T2000-A19 USB adaptor

TTL

RS-232

TM8115

RJ45 USBDB9

RJ12

TMAA20-04

T2000-A19 USB adaptor

RJ45 USBDB9

TMAA20-02

DB9

RJ12

TMAA20-04

T2000-A19 USB adaptor

RJ45 USBDB9

TMAA30-03

DB15

TTL

RS-232

TTL

RS-232

USB

RS-232

USB

RS-232

USB

microphone

TM8105

TM8115

TM8105

connector

programming

connector

auxiliary

connector

T950-001

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Connecting Third-Party Products 119

5.2 Internal Products

Important The maximum operating temperature specified for third-

party internal modules can be lower than the temperature

generated inside the radio in the ambient temperature range

specified for the radio. This may require a reduction in the

radio’s operating temperature range or duty cycle. Suitable

provisions for heat dissipation must be implemented.

5.2.1 Encryption Module (Scrambler)

Important The installation and configuration of encryption modules is

a complex task and should only be attempted by persons

with in-depth knowledge of the installation and commis-

sioning of encryption systems.

Interface

Specification The encryption module can be mounted inside the radio body where it

connects to the internal options connector via a standard 1.27mm pitch

ribbon cable. The internal options connector is described on page 27. The

audio lines are described in “Audio Tap In and Tap Out Lines” on page 91.

Figure 5.5 shows the diagram of an encryption module interfaced with the

internal options connector inside the radio body.

Figure 5.5 Diagram of encryption module connected to radio

internal

encryption

options

connector

module

RF connector

120 Connecting Third-Party Products TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

Configure the interface between the encryption module and the internal

options connector as described in Table 5.5.

Table 5.5 Encryption module interface specification

Encryption

module

Internal options

connector Description/parameter Specification

Signal Pin Signal

Power 113V8_SW Switched and unregulated power

from radio.

GND 3AGND analog ground.

PTT to options 9IOP_GPIO1 Control head PTT signal from radio.

Action:

Active State:

Module logic threshold required:

Reflect PTT Status

Low

3V3 CMOS-compatible1

Clear/code mode 10 IOP_GPIO2 Mode select from radio. Toggled by

radio function key.

Action:

Active State:

Module logic threshold required:

F1…F4 Key Status

Low

3V3 CMOS-compatible1

Secure mode 11 IOP_GPIO3 Mode indicator to radio.

Action:

Active State:

Toggle F1…F4 Key LED

High

Radio Tx audio to

module

2AUD_TAP_OUT Tx audio from radio.

Audio tap input point:

Audio tap input unmuting:

Signal level into 600Ω:

AUD_TAP_OUT output impedance:

Use T4-E

Use 'on PTT'

690mVp-p (60% RSD2)

600Ω typical

Module Tx

audio to radio

6AUD_TAP_IN Tx audio to radio.

Audio tap input point:

Audio tap input unmuting:

Signal level into 600Ω:

AUD_TAP_IN input impedance:

Use T4-E

Use 'except on PTT'

690mVp-p (60% RSD2)

100kΩ typical

Radio Rx audio to

module

2AUD_TAP_OUT Rx audio from radio.

Audio tap input point:

Audio tap input unmuting:

Signal level into 600Ω:

AUD_TAP_OUT output impedance:

Use T4-E

Use 'on PTT'

690mVp-p (60% RSD2)

600Ω typical

Module Rx

audio to radio

6AUD_TAP_IN Rx audio to radio.

Audio tap input point:

Audio tap input unmuting:

Signal level into 600Ω:

AUD_TAP_IN input impedance:

Use T4-E

Use 'except on PTT'

690mVp-p (60% RSD2)

100kΩ typical

1. If the module input is 5V CMOS then a 3.3kΩ pullup to 5V on the module will be required for compatibility.

For more information refer to “Digital Output Lines” on page 70.

2. RSD = Rated System Deviation

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Connecting Third-Party Products 121

Figure 5.6 shows the audio interfacing between the radio and the

encryption module specified in Table 5.5.

The audio interfaces in Figure 5.6 are recommended and best suit

Transcrypt SC20-4xx series encryption modules. This configuration

maximises system flexibility by not excluding other hardware options and

system configurations from being used with encryption. For example, the

encryption module could be used in a radio that is cross-band linked with a

second radio.

Figure 5.6 Encryption module - audio interfacing

deviation 300Hz de- future

processing

option

normaliser

3kHz

LPF HPF emphasis

audible

indicators

R10

R5R4R2R1

audio to

dev.

transmitter

modulator

pre-

future

processing

option

scaler

emphasis

ALC

mic

audio

T3T5T12T13

300Hz

HPF

future

processing

option

Key:

tap point (tap in or tap out)

DSPdigital signal processor

LPFlow-pass filter

HPFhigh-pass filter

ALCauto level controlled

receive audio path

transmit audio path

type A type B type C type D type E

tap types:

Combine Bypass Out Split SpliceBypass In

receiver

demodu-

lator

output

audio to

volume

control

and

speaker

decrypt/

encrypt

de-

emphasis

synch

pulse

detect

synch

pulse

inject

Rx in

Tx in

encryption module

2.5

kHz

LPF

AUD_TAP_IN

AUD_TAP_OUT

560 4.7k

DSP

Rx-Tx

audio

switch

DSP

Rx-Tx

audio

switch

300 Hz

pre-

limiter

3kHz

LPF emphasis HPF

122 Connecting Third-Party Products TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

Encryption Module

Hardware

Configuration

1. Configure the encryption module hardware as shown in Figure 5.6.

2. Adjust encryption module for unity through-gain. At least 11dB

headroom above the 1kHz 60% rated system deviation level will be

required throughout the audio processing chain on the module to

avoid clipping with speech signals.

3. Input pre-emphasis is required. A typical pre-emphasis circuit is

shown in Figure 5.7. If this not available on the module it will need

to be added as a separate circuit at the module input. Alternatively the

input buffer on the module can be modified if its topology matches

that of Figure 5.7.

Use the following procedure to choose the component values in

Figure 5.7:

a. Choose C1. 1nF is a typical value.

b. Determine R1: R1=1/(35300*C1)

c. Determine R2: R2=5.9*R1 for unity gain. Scale R2 propor-

tionally to change gain.

d. Ensure that C2 is zero.

e. Use the nearest preferred component values.

4. Ensure that de-emphasis is applied on both transmit and receive.

If this cannot be done via software then the de-emphasis control line

will need to be overridden by a hardware modification.

Encryption Module

Software

Configuration

To make configuration changes via over-the-air rekeying (OTAR), the

module needs to be installed in the radio and be operational.

Key Management For key management refer to the relevant sections of the encryption module

manufacturer’s documentation.

Figure 5.7 Encryption module - typical pre-emphasis circuit

C1 R1

half rail

to next encryption module

audio processing block

AUD_TAP_OUT

–

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Connecting Third-Party Products 123

Radio Programming Use the programming application to configure the radio.

1. In the Key Settings form, set one function key to

Action Digital Output Line.

2. In the PTT / PTT form, set the Advanced PTT group to:

■PTT Transmission Type: Voice

■PTT State Is Reflected: checked

■PTT Priority: Highest

■Audio Source: CH_MIC

3. In the Digital tab of the Programmable I/O form, carry out the

following settings:

4. In the Audio tab of the Programmable I/O form, carry out the

following settings:

Operation With the radios with user interfaces, one function key can be programmed

to toggle between Clear and Secure mode. The Secure LED lights up when

the radio is in Secure mode. The radio has no facility to change the

decryption/encryption code via the user interface.

When the radio is set to Clear mode (unencrypted), the encryption module

does not affect the radio operation.

Unencrypted messages received while the radio is in Secure mode will be

received as normal, i.e. the radio does not apply any decryption.

To initiate a secure call:

1. Press the Clear/Secure function key (if not already in Secure mode).

The Secure LED lights up.

2. Press PTT to set up a call (assuming the other party has valid

decryption). You must wait at least 0.5s before speaking to allow the

receiving encryption module to synchronise.

3. Carry out the call in standard manner.

Pin Direction Action Active Debounce Signal state

IOP_GPIO1 Output Reflect PTT Status Low None Momentary

IOP_GPIO2 Output F1 Key Status High None Momentary

IOP_GPIO3 Input Toggle F1 Key LED High 0 None

Rx /

PTT Type Tap In Tap In Type Tap In Unmute Tap

Out Tap Out Type Tap Out Unmute

Rx R7 E - Splice Busy Detect R7 E - Splice Busy Detect

EPTT1 T4 E - Splice On PTT T4 E - Splice On PTT

124 Connecting Third-Party Products TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

The radio will stay in Secure mode until the Clear/Secure function key is

pressed again.

The coding or setup of the encryption module can only be changed via the

over-the-air rekeying protocol (OTAR) provided by the module

manufacturer. For further information refer to the manufacturer’s

documentation.

Radio performance degradation is to be expected when encryption is active.

The main effects are reduced radio range and audio quality.

Testing With encryption off:

1. Check that the radio powers up normally, with the normal display

messages and confirmation tones.

2. Check that receive and transmit audio are functioning, using a service

instrument or another radio on the same channel.

With encryption on:

1. Check that the radio receives and transmits, using another TM8000

radio with the same encryption module, programmed with the same

codes, on the same channel.

2. Listen for the synchronisation pulses that occur approximately once a

second, added by encryption, to confirm encryption is active.

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Connecting Third-Party Products 125

5.2.2 ANI Module

Automatic Number Identification (ANI) modules can be installed in

portable or mobile radios. When the ANI module is installed, each radio

transmission can have a unique number attached to it to assist dispatchers in

identifying the source of transmission.

Note The radios also offer built-in ANI capabilities. For more informa-

tion refer to the online help of the programming application.

Interface

Specification The ANI module is mounted inside the radio body where it connects to the

internal options connector via a standard 1.27 mm pitch ribbon cable.

An optional emergency switch can be connected to AUX_GPIO4 and

AGND of the auxiliary connector.

The internal options connector is described on page 27.

Figure 5.8 shows the diagram of an ANI module interfaced with the

internal options connector inside the radio body.

Figure 5.8 Diagram of ANI module connected to radio

internal

ANI

options

connector

module

auxiliary

connector

emergency

switch

(optional)

AUX_GPIO4

AGND

126 Connecting Third-Party Products TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

Configure the internal options interface as described in Table 5.6:

Table 5.6 ANI module interface specification

ANI module Internal options

connector Description/parameter Specification

Signal Pin Signal

Power 113V8_SW Switched and unregulated power

from radio.

GND 3AGND analog ground.

PTT in/out19IOP_GPIO1 Control head PTT signal from radio.

Action:

Active State:

Module logic threshold required:

Reflect PTT Status

Low

3V3 CMOS-compatible2

Emergency input 10 IOP_GPIO2 Emergency signal from radio. Signal

mirrored from auxiliary connector.

Action:

Active State:

Module logic threshold required:

Mirrored from AUX_GPIO43

Low

3V3 CMOS-compatible2

Mic mute 11 IOP_GPIO3 Mic mute signal to radio. Used as

PTT input in order to switch audio

source from radio mic to ANI.

Action:

Active State:

External PTT2

Low

Module tone out 6AUD_TAP_IN Tone output to radio.

Audio tap input point:

Audio tap input unmuting:

Signal level required:

AUD_TAP_IN input impedance:

Use T5-A

Use 'on PTT'

690mVp-p (60% RSD4)

100kΩ typical

1. If the ANI module has separate PTT in and out signals, tie these together on the module. This will disable the mod-

ules on-board Tx timer. Ensure the radios Tx timer duration is set as you require.

2. If the module input is 5V CMOS, a 3.3kΩ pullup to 5V must be fitted on the module.

3. The radio’s emergency mode should be disabled if the modules emergency features are used.

4. RSD = Rated System Deviation

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Connecting Third-Party Products 127

Radio Programming Use the programming application to configure the radio.

1. In the Digital tab of the Programmable I/O form, carry out the

following settings:

2. In the Audio tab of the Programmable I/O form, carry out the

following settings:

3. In the PTT / PTT form, set the Advanced PTT group to:

■PTT Transmission Type: Voice

■PTT State Is Reflected: checked

■PTT Priority: Medium

■Audio Source: CH_MIC

4. In the PTT / External PTT1 form, set the Advanced EPTT1 group

to:

■PTT Transmission Type: None

■PTT State Is Reflected: cleared

5. In the PTT / External PTT2 form, set the Advanced EPTT2 group

to:

■PTT Transmission Type: Voice

■PTT State Is Reflected: cleared

■PTT Priority: Highest

■Audio Source: Audio Tap In

ANI Module

Programming Refer to the manufacturer’s documentation.

Pin Direction Action Active Debounce Signal state Mirrored to

AUX_GPIO4 Input No action High 100 None IOP_GPIO2

IOP_GPIO1 Output Reflect PTT Status None None Momentary None

IOP_GPIO2 Output No action None None Momentary None

IOP_GPIO3 Input External PTT2 None 0 None None

Rx /

PTT Type Tap In Tap In Type Tap In Unmute Tap

Out Tap Out Type Tap Out Unmute

EPTT2 T5 A - Bypass In On PTT None C - Bypass Out On PTT

128 Connecting Third-Party Products TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Connecting an External Alert Device 129

6 Connecting an External Alert Device

The TM8100 and TM8200 radios allows for output to external alert devices

using the digital GPIO lines of the auxiliary connector, the internal options

connector and, with the blank control head, the programming connector.

The AUX_GPIO4 line of the auxiliary connector can be fitted with a power

MOSFET in order to directly connect external alert devices (e.g. flashing

light, buzzer, horn relay) to the radio. With the other GPIO lines and if no

power MOSFET is fitted to the AUX_GPIO4 line, the signal characteristics

specified in “Description of the Radio Interfaces” apply.

This chapter describes the connection of an external alert device to the

AUX_GPIO4 line of the auxiliary connector and the programming of the

radio for an external alert signal.

Important Modifications to radio-frequency transmitting equipment

can void the user's authority to operate the equipment.

By distributing the TM8000 3DK Hardware Developer’s

Kit, Tait Electronics Limited. does not accept liability for

any non-compliance or infringement of intellectual prop-

erty rights resulting from the application or use of this kit

or information. Any person modifying Tait radio-fre-

quency transmitting equipment is responsible for ensuring

that the modified equipment meets all legal and regulatory

requirements in the country of use or supply.

To connect an external alert device to the AUX_GPIO4 line of the auxiliary

connector, the following steps must be carried out:

1. Fit power MOSFET Q707 and remove resistor R768.

2. Program the radio.

3. Connect the external alert device.

130 Connecting an External Alert Device TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

6.1 Fitting Power MOSFET Q707 and

Removing Resistor R768

Before connecting an external alert device to the AUX_GPIO4 line, a 12A,

60V, logic level power MOSFET (ON Semiconductor1 product

NTD3055L104, www.onsemi.com [Tait IPN 000-03055-00]) must be

fitted to position Q707 and resistor R768 must be removed from the main

board assembly.

Figure 6.1 shows the circuit diagram of the AUX_GPIO4 line in factory

configuration. For a complete circuit diagram of the main board assembly

refer to the service manual for your radio.

Figure 6.2 shows the positions of Q707 and R768. For a complete layout of

the main board assembly refer to the service manual for your radio.

Follow the instructions of the service manual for your radio on removing

and fitting the radio lid, the main board assembly, and standard and SMD

components.

1. ON Semiconductor is a trademark of Semiconductor Components Industries, L.L.C.

Figure 6.1 Circuit diagram of the AUX_GPIO4 line (factory configuration)

R782

0805

R778

0805

R769

33K

*not fitted

D713

BAV99W

D713

BAV99W

C725

470P

NTD3055L104

Q707

R761

Q703

BC847BPN

R753

4K7

Q703

BC847BPN

D711

BAV70W

R757

47K

R745

100K R748

4K7

1B4

AUX_GPIO4

+13V8_BATT

+13V8_SW+5V+3V3

+3V3_CL

+3V3

ITF_AUX_GPI4

DIG_AUX_GPI4 R768

023

Figure 6.2 Positions of Q707 and

R768

on the main board assembly

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Connecting an External Alert Device 131

6.2 Radio Programming

Programmable I/O

Form In the Digital tab of the Programmable I/O form, select the AUX_GPIO4

pin and set Direction to Output, Action to External Alert 1 or 2, Active to

Low and Signal State to Momentary.

For further information on the External Alert action refer to “External Alert

1 and 2” on page 80.

Networks / Alerts

Form In the General and External Alerts tab of the Networks / Alerts form,

configure the settings of the external alerts.

For further information on how to configure the Alerts form refer to the

online help of the programming software.

6.3 Connecting the External Alert Device

Important While MOSFET Q707 is rated at 12A (with heat sink), the

maximum allowable current of the connector and radio’s

earthing system is 2A. Therefore, a horn must not be con-

nected directly to the radio. A horn relay must be used.

Connect the external alert device to pin 10 (AUX_GPIO4) and pin 8

(13V8_SW) of the auxiliary connector (or a different positive battery

connection).

132 Connecting an External Alert Device TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Computer-Controlled Radio 133

7 Computer-Controlled Radio

7.1 Introduction

7.1.1 Overview

This chapter provides details of the Computer-Controlled Radio (CCR)

protocol, version 2.00. It describes the radio to Data Terminal Equipment

(DTE) protocol. This is an advanced radio control feature.

Note CCR applies to TM8100 radio terminals only.

The CCR protocol is intended to provide a means of controlling a radio

unit from some form of DTE via a serial interface (PC, AVL application,

Telemetry Application, MDT).

In CCR mode, the radio no longer uses a non-volatile database. A number

of radio parameters are uploaded and changed during run-time from an

external application. In this way, the external application provides the non-

volatile data storage.

All serial ports on the radio support CCR (Microphone, Auxiliary and

Internal Options).

The TM8100 CCR mode is a sub-mode of CCDI. Entry into CCR is via

a CCDI command (“f0200D8”). Once, in CCR mode the radio will accept

serial CCR commands and will no longer process CCDI commands.

The TM8100 series of radios are able to support USER, CCDI Transparent

and CCR modes of operation.

7.1.2 Benefits

Most of the radio functionality can be controlled by the external device

operating over a serial communications link. This allows system integrators

to develop their own intelligent control device. They can develop complex

solutions with a low cost RF platform.

In essence, a radio which has access to all the channels in its operating range

could be made. The limit is no longer in the mobile but in the external

intelligence driving it. A wider range of methods can be employed to alter

or modify the way the radio is controlled by the user; a step forward in

control evolution.

134 Computer-Controlled Radio TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

7.1.3 Configurable Parameters

Channel information:

■Tx/Rx frequencies

■Tx & Rx CTCSS/DCS frequencies

■Tx power level

■Channel bandwidth

The unit can accept or send Selcall in:

■All the international tone formats

■Between 2 and 8 tones per sequence.

■Tone durations from 20 - 100ms

■ANI leading/trailing sequence

Other features:

■Audio volume level

■Enable/disable monitor

7.1.4 Potential Applications

■Complex conventional radio units (multi-system)

■MDT controlled radio

■Remote off-air monitoring

■System integration

■Self healing RF networks

■Rapid deployment - inter operability

■Hybrid solutions

7.2 Programmable Parameters

CCR depends on the same programmable parameters as those used to

configure CCDI command mode.

7.2.1 Requirements

The following needs to be enabled as a minimum:

■Enable CCDI

■Enable a serial port for communications (Auxiliary, Mic or Internal

Options connector) as follows:

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Computer-Controlled Radio 135

Note The recommended configuration parameters are in Bold.

Note The serial port on the TM8100 is capable of driving only a limited

cable length. See “Line Lengths” on page 12.

Radio operation while in CCR mode also requires, as a minimum, the

following to be defined:

■Enable at least one channel

■Enable at least one PTT & microphone for voice

For selcall commands it is also necessary to enable at least one network using

selcall signalling, as follows:

■Enable network to be selcall

The radio will, upon entry to CCR, inherit programmable parameters from

the channel that was active when CCR was entered. Modifications while in

CCR mode to channel/network characteristics will be compared to this

baseline. All CCR changes are temporary, nothing is saved to the database,

therefore they are lost on power cycling.

7.3 Command Protocol

The DTE is connected to the RU via a serial link. Command and response

messages are generated between the DTE and the RU.

7.4 Command Description

This section details the standard messages.

7.4.1 Message Format

All CCR mode message packets take the following general form:

[IDENT][SIZE][PARAMETERS][CHECKSUM]<CR>

Parameter Value

Baud rate 1200, 2400, 4800, 9600, 14400, or 19200

Number of data bits 8

Parity None

Number of stop bits 1

136 Computer-Controlled Radio TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

Where:

General characteristics of the message format worth noting are as follows:

■All characters in a message are printable ASCII

■Where numeric values are represented in ASCII-hex notation (two

characters per byte), digits A...F are upper case

■The minimum length of a command packet is 5 characters; i.e. when

[SIZE] = 00. For example, c003D is the CANCEL command which is

5 characters.

■The maximum length of the [PARAMETERS] field is 32 characters, so

that the maximum length of the command packet is therefore

37 ([SIZE]=“20”) characters

7.4.2 Calculating [CHECKSUM]

[CHECKSUM] is calculated by applying the following algorithm:

1. Take the modulo-2 sum of all message bytes preceding

[CHECKSUM].

2. Retain bits 0...7, discarding any higher order bits resulting from the

summation.

3. Form the two's complement of the remainder.

4. Convert the binary number into two ASCII-hex digits, MSD first.

Checksum Example s0D050800TESTHi!DA

1. Take the modulo-2 sum of all message bytes preceding

[CHECKSUM].

■s = 73h, 0 = 30h, D = 44h etc. therefore the modulo-2 sum is:

Parameter Value

[IDENT] is the message identifier. Identifiers are single ASCII characters

which categorise the message type

[SIZE] is the number of characters which make up the [PARAMETERS]

field. [SIZE] is an 8-bit number expressed in ASCII-hex notation

(two characters)

[PARAMETERS] is an optional field, depending upon the command. Parameter

values are generally character strings unless explicitly stated

otherwise. Parameter type is dependent upon the command -

there is no explicit type definition.

[CHECKSUM] s an 8-bit checksum of the [IDENT], [SIZE] and [PARAMETERS]

fields. It is expressed in ASCII-hex notation (two characters)

<CR> is the packet terminator. It is the ASCII “carriage return”

character (0Dh).

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Computer-Controlled Radio 137

73 + 30 + 44 + 30 + 35 + 30 + 38 + 30 + 30 + 54 + 45 + 53 + 54

+ 48 + 69 + 21 = 426h

2. Retain bits 0 to 7, discarding any higher order bits resulting from the

summation.

26h

3. Form the two’s complement of the remainder.

26h = 0010 0110

two’s complement = 1101 1010

4. Convert the binary number into two ASCII hex digits, MSD first.

1101 1010 = DA

7.5 CCR Mode Commands

7.5.1 Entering CCR Mode

CCR mode is entered from CCDI with the function zero command,

“f0200D8”. This command is described in the CCDI specifications.

Entry to CCR mode will be denied if the radio is busy scanning,

transmitting or processing emergency mode activities. CCR mode is not,

however, blocked when the radio is stunned; CCR can run in this state.

7.5.2 CCR/CCDI Mode Independence

CCDI and CCR are independent from each other in that commands and

responses for either command interpreter can only be processed in its own

mode. There are, for instance, no CCDI progress messages when the radio

is in CCR mode.

7.5.3 CCR Mode Activated

The radio sends the string “M01R00” to the DTE when CCR mode is

activated.

7.5.4 CCR Mode Busy

It is possible to program an output line for busy detect status in CCR mode.

138 Computer-Controlled Radio TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

7.5.5 Blocked Functions

CCR mode denies the following functions (that are available in user mode)

and indicates them as invalid if they are attempted from a front panel or

programmable input:

■Channel selection

■Scanning

■Emergency

■SDM (No GPS)

■User mode selcalling:

■No call setups with the front panel controls, programmable I/O

or PTT

■No selcall alerting for identities defined in the database

CCR is intended for headless radio units. Third parties can, upon

integration, add their own implementations for things like scanning & selcall

alerts.

Note PTT initiated functionality will only be suppressed, not indicated,

notably, PTT call setup.

7.5.6 CCR Persistence

When a radio is reset nothing is saved from the current CCR session to the

next power up. Third party devices can check that the radio is alive with the

pulse command and “reprogram” it when a power outage has been detected.

7.5.7 CCR Response Time

The receive frequency in CCR mode can be changed at least every 20ms.

7.6 CCR Positive Acknowledgements

The radio validates the received strings since the last command on the serial

port versus the CCR protocol when it sees an instance of the terminating

character <CR>. It returns either a positive or negative acknowledgement.

The positive acknowledgement has the following format.

Response +ssxCC

Where:

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Computer-Controlled Radio 139

Effect An ACK response is sent back when a command has been accepted, the

radio does not wait until the command has been executed. The ACK may

be delayed, in some cases, but usually it is sent back immediately.

7.7 CCR Negative Acknowledgements

The radio validates the received strings since the last command on the serial

port versus the CCR protocol when it sees an instance of the terminating

character <CR>. It returns either a positive or negative acknowledgement.

The negative acknowledgements are as follows.

7.7.1 Invalid CCR Command

If a string does not conform to the protocol, or there is something else

inhibiting its execution, it is rejected and a negative acknowledgement is

sent to the user. The negative acknowledgement has the following format.

Response -ssrrxCC

Where:

Note A command is only ever rejected with one error code.

Parameter Value

+ the ASCII ‘+’ character indicates that the command was accepted

ss ASCII hex number ss is the size of the ack (always “01”)

x echoes back the command identity, the first letter (R, T, A, B, S, M…)

CC ASCII hex number CC is the checksum

Parameter Value

- the ASCII ‘–’ character indicates that the command was rejected

rr indicates the reason for rejecting the command as follows:

■‘02’Checksum error

■‘01’Invalid command

■‘03’Parameter error in command

■‘05’Radio is busy

■‘06’Command is not accepted

x echoes back the command identity, but only if the checksum in the

command was correct

CC ASCII hex number CC is the checksum

140 Computer-Controlled Radio TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

Effect The implementation exits the validation as soon as an error has been struck

- it will not check the parameters if the command does not pass the

checksum test.

7.7.2 Validation Checksum Error

If the input string does not have the correct checksum, a checksum error is

immediately reported and no further checks are done.

7.7.3 Invalid Validation Command

If the input string passes the checksum test but the identity contained is not

a recognised CCR command, an invalid command is reported.

7.7.4 Validation Parameter Error

If the input string passes the general message format but not the command

specific tests, a parameter error is sent. For details on validation rules see the

specific commands.

■data length check

■range check on message data

■correct sequence of commands

7.7.5 Radio Busy Message

If the input string passes both the general and command specific validation

criteria, it is processed only if the following conditions are true:

■Radio is not in transmitting state

■Radio is not busy processing the last sent command

The radio rejects the commands and returns the busy error code in these

instances.

7.7.6 Command Not Accepted Message

Some commands trigger sequence errors if they are sent when the radio

cannot process the command, for example:

■Radio is attempting to use a selcall command when there is no selcall

configuration defined.

This error is, for instance, sent if a selcall command is received, but the CCR

channel is not activated with a network using selcall signalling.

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Computer-Controlled Radio 141

7.8 CCR Commands

7.8.1 Summary and Examples

The messages in the following table are sent from the DTE to the RU.

In all cases, if the command is received without error by the RU and all the

parameters are valid, the command will be executed and the prompt will be

returned to the DTE. If an error arises, the DTE will be notified with an

appropriate response.

Examples f0200D8 Enter ccr from ccdi

E005B Exit - same effect as “^”

R0945320000087 Set Rx frequency to 453.2MHz

T0945320000085 Set Tx frequency to 453.2MHz

Q01PFE Pulse command, returns “P” when minimum config

exists

P0111E Set power to Very Low

P0141B Set power to High

H01324 Set bandwidth to Wide

H01126 Set bandwidth to Narrow

A0406708E Set Rx ctcss to 67Hz

A0400009B Set Rx ctcss to 0Hz

B0406708D Set Tx ctcss to 67Hz

B0400009A Set Tx ctcss to 0Hz

C03023C5 Set Rx DCS to 23

Message Cmd Function

RssxxxxxxxxxCC R Go to receive frequency

TssxxxxxxxxxCC T Load transmit frequency

HssxCC H Set bandwidth

JssxxxCC J Set volume level

AssxxxxCC A Receive ctcss value

BssxxxxCC B Transmit ctcss value

CssxxxxCC C Receive dcs code value

DssxxxxCC D Transmit dcs code value

SssxxxxxCC S Encode Selcall sequence

IsstplCC I Set Selcall Parameters

NsspxxxxxCC N Set ANI

PssxCC P Set Power

QssxCC Q Query Commands

EssCC E Exit CCR Mode

142 Computer-Controlled Radio TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

C03000CA Set Rx DCS to 0

D03023C4 Set Tx DCS to 23

D03000C9 Set Tx DCS to 0

S051234549 Dial 12345

I03015BE Select toneset 0, ccir, 20ms tones and 5 tones notify

N04112387 Set ani to leading and tones 123

M01D0E Monitor “on”

M01E0D Monitor “off ”

J03000C3 Volume level 0 (range is 0-255)

J03104BE Volume level 104 (range is 0-255)

7.8.2 Go to Receive Frequency

Description On receipt of this command, the radio checks the format and does a range

check on the frequency. If it is valid, the radio sends an ACK response and

then initialises the synthesizer with the new frequency. One should allow

20ms for the synthesizer to settle at the new frequency. If the command is

invalid, a NAK response will be sent and the receiver will remain at the last

selected frequency. If the radio is transmitting then a NAK response will also

be sent.

Command RssxxxxxxxxxCC

Where:

Effect This command has immediate effect with the receiver retuning to this

channel. If the synthesizer is out of lock then a NAK response will be sent.

Parameter Value

R ASCII letter R denotes the go to Receive frequency

ss ASCII hex number ss is the number of x characters “08” or “09”

xxxxxxxxx ASCII number xxxxxxxxx is the receive frequency, as follows:

■Minimum is a number representing the bottom of the radio model

frequency band

■Maximum is a number representing the top of the radio model

frequency band

CC ASCII hex number CC is the checksum

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Computer-Controlled Radio 143

7.8.3 Load Transmit Frequency

Description On receipt of this command, the radio checks the format and does a range

check on the frequency. If it is valid, the radio sends an ACK response. If the

command is invalid, a NAK response will be sent and the transmit frequency

will not change. If the radio is transmitting then a NAK response will also

be sent.

Command TssxxxxxxxxxCC

Where:

Effect This command loads the transmit frequency into a memory location for use

when the PTT or Selcall encoder is next active. The radio will not transmit

if the synthesizer is out of lock.

7.8.4 Set Volume Level

Description This command sets the volume level for received audio. If the index number

is out of range the radio does not act on the command and sends a NAK

(range error) back.

Command JssxxxCC

Where:

Parameter Value

T ASCII letter T denotes the Load Transmit Frequency command

ss ASCII hex number ss is the number of x characters “08” or “09”

xxxxxxxxx ASCII number xxxxxxxxx is the transmit frequency, as follows:

■Minimum is a number representing the bottom of the radio model

frequency band

■Maximum is a number representing the top of the radio model

frequency band

CC ASCII hex number CC is the checksum

Parameter Value

J ASCII letter J denotes the Set Volume Level command

ss ASCII hex number ss is the number of x characters (always “03”)

xxx ASCII number xxx is a volume level value in the range of 0 to 255

(255 is the maximum)

CC ASCII hex number CC is the checksum

144 Computer-Controlled Radio TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

Effect This command has immediate effect.

If there is a volume knob on the radio there is no guarantee that the value

set with this command will be the volume. The radio will use the level last

set with any control.

7.8.5 Receive CTCSS Value

Description This command disables (if xxxx=0), or enables (if xxxx>0), Rx CTCSS.

If enabled, the audio mute is opened only when a given subaudible CTCSS

tone is being received (otherwise the audio mute is closed). If disabled,

muting on CTCSS is disabled. If the frequency is out of range, the radio

does not act on the command and sends a NAK (range error) back.

Command AssxxxCC

Where:

Effect This command has immediate effect and closes the mute to signals without

a valid CTCSS tone if enabled, or opens the mute on disabling CTCSS

muting.

7.8.6 Transmit CTCSS Value

Description This command disables (if xxxx=0) or enables (if xxxx>0), Tx CTCSS. If

enabled, a CTCSS tone is transmitted whenever the radio is transmitting

audio. If the reference number is out of range, the radio does not act on the

command and sends a NAK (range error) back to the radio. If the radio is

already transmitting then a NAK response will also be sent.

Command BssxxxCC

Where:

Parameter Value

A ASCII letter A denotes the Receive CTCSS Value load command

ss ASCII hex number ss is the number of x characters (always “04”)

xxxx ASCII number xxxx is a receive subaudible frequency in 0.1Hz. The

valid range is 67Hz to 254.1 Hz.

CC ASCII hex number CC is the checksum

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Computer-Controlled Radio 145

Effect On receipt of the request the radio stores the CTCSS tone to generate. The

radio will then generate the tone at the next PTT or Selcall encode activity.

7.8.7 Receive DCS Value

Description This command disables the DCS filter if the code is “000”. If the code is not

recognized as an octal, the radio does not act on the command and sends a

NAK (range error) back.

Command CssxxxCC

Where:

Effect This command has immediate effect and closes the mute to signals without

a valid DCS tone.

7.8.8 Transmit DCS Value

Description This command disables the DCS encoding if the code is “000”. If the code

is not recognized as an octal, the radio does not act on the command and

sends a NAK (range error) back.

Command DssxxxCC

Where:

Parameter Value

B ASCII letter B denotes the transmit CTCSS value to be sent on

transmit

ss ASCII hex number ss is the number of x characters (always “04”)

xxxx ASCII number xxxx is a transmit CTCSS frequency in 0.1Hz. The valid

range is 67Hz to 254.1 Hz.

CC ASCII hex number CC is the checksum

Parameter Value

C ASCII letter C denotes the Receive DCS Value load command

ss ASCII hex number ss is the number of x characters (always “03”)

xxx ASCII number xxx represents a DCS code in octal

CC ASCII hex number CC is the checksum

146 Computer-Controlled Radio TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

Effect This command loads the value into memory ready for the next PTT or

Selcall encode activity.

7.8.9 Encode Selcall Sequence

Description This command turns the transmitter on and sends the Selcall string

following a short delay (network 1 lead-in delay). If the number of tones is

incorrect the command is rejected (NAK-format error).

Command Sssxx..xxCC

Where:

The Set Selcall Parameter command (see below) allows the user to change

the Selcall parameter defaults.

Effect This command has immediate effect, provided that the receiver and

transmitter frequency values have been initialised and the radio is not

transmitting at the time (PTT active causes busy error)

7.8.10 Set Selcall Parameters

Description This command allows the user to modify the Selcall default parameters (tone

set to use, tone period, number of tones in Tx sequence and number of

tones in Rx sequence). If any of the command parameters are out of range,

a NAK (range error) will be sent back to the control head.

Parameter Value

D ASCII letter D denotes the transmit DCS value to be sent on transmit

ss ASCII hex number ss is the number of x characters (always “03”)

xxx ASCII number xxx represents a DCS code in octal

CC ASCII hex number CC is the checksum

Parameter Value

S ASCII letter S denotes the Transmit Selcall tone sequence

ss ASCII hex number ss is the number of x characters

xx..xx ASCII number xx..xx is the tone sequence. Minimum is 2 tones and

maximum is 33.

CC ASCII hex number CC is the checksum

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Computer-Controlled Radio 147

Command IsstplCC

Where:

Effect The Selcall modem is immediately re-initialised with the new decode

parameter map. These new parameters are applied for the next Selcall

decode/encode sequence.

CCR default parameters are those loaded from the network associated to the

selected channel when the radio enters CCR mode. This includes selcall

parameters like ‘lead in delay’, which it is not possible to alter in CCR

mode.

Parameter Value

I the ASCII letter I denotes the Set Selcall Parameter command

ss ASCII hex number ss is the number of parameters (always “03”)

t specifies the Tone Set to use. This can be one of the following:

■’0’CCIR

■’1’EIA

■’2’EEA

■’3’ZVEI-I

■’4’ZVEI-II

■’5’ZVEI-III

■’6’PZVEI

■’7’NATEL

■’8’DZVEI

p specifies the Tone Period to use. This can be one of the following:

■’1’20ms

■’2’33ms

■’3’40ms

■’4’50ms

■’5’60ms

■’6’70ms

■’7’100ms

l sets the decode buffer time and message filter as defined in “Notify

Buffer Size” on page 153 and “Selcall Decode Sequence” on page

153.

CC ASCII hex number CC is the checksum

148 Computer-Controlled Radio TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

7.8.11 Set ANI

Description This command disables or enables ANI. It configures what ANI sequence is

to be sent and when the ANI sequence is to be sent. If p is not ‘0’, the tone

sequence gets stored.

If the number of tones (xx...xx) does not match the currently configured

length, then the command is rejected (NAK- format error). It is also

rejected if p is out of range (range error).

Command Nsspxx..xxCC

Where:

Effect If enabled, the ANI tones get stored and any subsequent use of the PTT

button activates ANI.

7.8.12 Monitor

Description This command is the same as the monitor function available on the function

keys in normal user mode. When it is active, it overrides any active

subaudible signalling filters. The squelch mute is not overridden.

Command MssxCC

Parameter Value

N ASCII letter N denotes the Automatic Number Identification

command

ss ASCII hex number ss is the number of parameters

p denotes the ANI position with regard to PTT presses. Valid values are:

■’0’disables ANI (in this case the tone sequence xx..xx is not

required)

■’1’leading ANI (ANI is sent soon after PTT is pressed)

■’2’trailing ANI (ANI is sent when PTT is released)

■’3’combination of 1 and 2

xx..xx is the 5 to 8 tone sequence. It is optional if p is set to 0.

CC ASCII hex number CC is the checksum

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Computer-Controlled Radio 149

Where:

Effect Immediate.

If there is a front panel key or programmable input with monitor configured,

there is no guarantee that the value set with this command will represent the

monitor state. The radio will use the state last set with any control.

7.8.13 Transmitter Output Power

Description The transmitter output power is set to the value selected. If the index is

incorrect the command is rejected (NAK-format error).

Command PssxCC

Where:

Effect The modified power level takes effect on the next Tx activity; either PTT

or Selcall.

Note If there is a front panel key or programmable input with low power

configured, there is no guarantee that the value set with this com-

mand will represent the effective output power. The radio will use

the state last set with any control.

Parameter Value

M ASCII letter M indicates it is a monitor command

ss ASCII hex number ss is the number of parameters (always “01”)

x is the mute state wanted, as follows:

■’D’for disable mute (monitor)

■’E’for enable mute

CC ASCII hex number CC is the checksum

Parameter Value

P ASCII letter P indicates it is a power command

ss ASCII hex number ss is the number of parameters (always “01”)

x is an index to transmit power level, as follows:

■‘1’very low power

■‘2’low power

■‘3’medium power

■‘4’high power

CC ASCII hex number CC is the checksum

150 Computer-Controlled Radio TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

7.8.14 Set Bandwidth

Description This command sets the operating transmit/receive bandwidth. If the index

number is out of range, the radio does not act on the command and sends a

NAK (range error) back.

Command HssxCC

Where:

Effect This command has immediate effect.

7.8.15 Query Radio Pulse

Description The purpose of this command is to give the user a way to “ping” the radio.

The radio pulse command allows you to check that the radio is still

responding. The control device may use the radio pulse command every ten

seconds in the absence of other activity.

Command Q01PFE

Where:

Parameter Value

H ASCII letter denotes the Set Bandwith command

ss ASCII hex number ss is the number of x characters (always “01”)

x is the Bandwith Index, as follows:

■‘1’narrowband

■‘2’mediumband

■‘3’wideband

CC ASCII hex number CC is the checksum

Parameter Value

Q ASCII letter Q indicates it is a query command as opposed to a set-up

command

01 ASCII hex number 01 indicates it has 1 parameter

P ASCII letter P indicates it is the radio pulse command

FE ASCII letters FE are the checksum

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Computer-Controlled Radio 151

Response The radio will send back one of two responses:

■QssPCC - if the radio has got its minimum configuration, which

typically consists of having received a ‘set receive frequency’ command.

■QssDCC - is returned if the radio has loaded its default set-up and has

not yet received a ‘set receive frequency’ command.

Effect These commands invoke an immediate reply.

7.8.16 Exit CCR Mode

Description The radio initiates a software reset (same as for “^”), and exits CCR mode.

Command E005B

Where:

Effect This command is immediate. The radio will reset.

Parameter Value

E ASCII letter E indicates it is an exit command

00 ASCII hex number “00” indicates it has no parameter

5B ASCII characters “5B” are the checksum

152 Computer-Controlled Radio TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

7.9 Unsolicited Messages from the Radio

7.9.1 Summary and Examples

The following messages may be returned to the DTE without user

intervention.

Examples: V0612345-18 Sequence 12345 detected

V065E5E5-EE Sequence 55555 detected (E is repeat tone in this case)

M01P02 Transmit timeout warning (10s before inhibit)

M01R00 CCR mode entered

7.9.2 PTT exceeds max transmit limit

Description The radio uses this response to advise the control head that PTT is about to

timeout.

For control heads with user interfaces, the warning threshold is the duration

timer configured for the network minus 10s.

Response MsspCC

Where:

Effect Whenever the radio reaches its maximum transmit period the radio will

inform the control head. After a further short delay the radio will turn off

the transmitter.

Message Cmd Function

Vssxx..xxCC V Selcall decode sequence

MsspCC MP Ptt exceeds max transmit limit

MssrCC MR CCR initialised

Parameter Value

M ASCII letter M denotes the message

ss ASCII hex number ss is the number of parameters (always “01”)

P ASCII letter P denotes a PTT being applied that has exceeded the

default transmit timer warning threshold

CC ASCII hex number CC is the checksum

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual Computer-Controlled Radio 153

7.9.3 Selcall Decode Sequence

Description The radio sends this message every time the decoder tone buffer is emptied,

in accordance with the notification criteria set by the “I” command. See

“Set Selcall Parameters” on page 146 and “Notify Buffer Size” on page

153.

The sequences received are represented with the tones from the toneset.

Repeat tones and gaps will be forwarded as is.

Response Vssxx..xxCC

Where:

■CC is the checksum as defined

Effect When the radio receives the given SELCALL sequence the radio sends the

decoded sequence to the DTE.

7.9.4 Notify Buffer Size

Description The number of tones to notify, set by the selcall parameter command, allow

the user to define the size of the decode tone buffer. This buffer sets the

maximum time period that the radio will decode and log tones before

reporting to the user, when continuously receiving valid selcall tones. The

timer is calculated as follows:

Tmax = (N x P) + P

Parameter Value

V ASCII letter V denotes the Selcall decode message

ss ASCII hex number ss is the number of parameters

xx..xx are the tones decoded within the time window specified by the

notify parameters as follows:

■ASCII digits 0 to 9

■Special tones are represented with ASCII letters A to F

■Gap. A gap in CCR is equal to the tone period set by the Selcall

Parameter command

CC ASCII hex number CC is the checksum

154 Computer-Controlled Radio TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual

Where:

The buffer timer is started after at least one valid tone has been detected.

The buffer timer is reset if a gap is detected prior to expiry.

The notify parameter also sets a filter that allows the user to suppress decode

sequences from being reported if they consist of less than the selected

number of tones in a continuous sequence, as follows:

■If the decode buffer contains less than the selected number of tones when

it is reset the contents shall be discarded.

If a radio in CCR receives a speech call it is very likely that the user will see

this response with garbage decode sequences (1 or 2 tones) if the filter is

removed.

The additional tone period added to the buffer time allows the radio to

detect and report if a gap was present or not after the sequence detected.

Parameter Value

Tmax Notify buffer maximum time

N Number of tones

P Tone period

TM8100/TM8200 3DK Hardware Developer’s Kit Application Manual 155

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