Simoco Wireless Solutions SRM9000TU UHF MOBILE TRANSCEIVER User Manual SERVICE MANUAL

Simoco Australasia Pty Ltd UHF MOBILE TRANSCEIVER SERVICE MANUAL

1. SERVICE MANUAL
2. USERS MANUAL

SERVICE MANUAL

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Document Description	SERVICE MANUAL
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Creation Date	2006-05-16 13:48:44
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Document Title	TNM-M-E-0002 SRM9000_Service_Manual_R9_V1-0_060516.PDF
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Document Author:	_TMCSCANPC

SRM 9000 Series
FM VHF/UHF Mobile
Radio Transceiver
Revision 9 Hardware
SERVICE MANUAL
TNM-M-E-0002
ISSUE 1.0
May 2006
ISO9001 Lic.QEC20848
SAI Global
SRM9000 Series Mobile Radio Transceiver Rev 9 Hardware TNM-M-E-0002 ~ Iss 1.0
SRM9000 SERIES SERVICE MANUAL
TABLE OF CONTENTS
APPENDICES........................................................................................................................................ III
DECLARATION..................................................................................................................................... IV
COPYRIGHT ......................................................................................................................................... IV
ERRORS AND OMISSIONS .................................................................................................................. IV
DOCUMENT HISTORY .......................................................................................................................... V
LIST OF ASSOCIATED PUBLICATIONS .............................................................................................. V
WARNINGS AND CAUTIONS ............................................................................................................... VI
1.
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
2.
INTRODUCTION .......................................................................................................................... 1
GENERAL................................................................................................................................... 1
SCOPE ...................................................................................................................................... 1
DESCRIPTION ............................................................................................................................. 1
PRODUCT VARIANTS AND FACILITIES ............................................................................................ 2
SOFTWARE VERSIONS AND NAMING .............................................................................................. 5
1.5.1
Filename Structure........................................................................................................... 5
1.5.2
Application Code.............................................................................................................. 5
1.5.3
Software Type Code......................................................................................................... 5
1.5.4
Version Number ............................................................................................................... 7
1.5.5
Exclusions........................................................................................................................ 7
1.5.6
Displaying Software Versions ........................................................................................... 7
1.5.7
Automatic Version Upgrade Prompting............................................................................. 8
1.5.8
Transceiver SW Description, Start-up and Backup-Software ............................................ 9
1.5.9
Wailing Siren (Boot-up Software Corrupted)..................................................................... 9
ADJUSTMENT AND ALIGNMENT ..................................................................................................... 9
CHASSIS ASSEMBLY ................................................................................................................. 10
1.7.1
Torque Settings.............................................................................................................. 10
1.7.2
Thermal Compound Application ..................................................................................... 10
1.7.3
Assembly ....................................................................................................................... 10
SPECIFICATION ......................................................................................................................... 10
1.8.1
General .......................................................................................................................... 10
1.8.2
Transmitter..................................................................................................................... 12
1.8.3
Receiver ........................................................................................................................ 13
1.8.4
Signalling ....................................................................................................................... 14
1.8.4.1 CTCSS ............................................................................................................... 14
1.8.4.2 FFSK.................................................................................................................. 15
1.8.4.3 Selcall ................................................................................................................ 15
1.8.4.4 DTMF ................................................................................................................. 17
1.8.4.5 DCS ................................................................................................................... 18
1.8.4.6 C4FM ................................................................................................................. 18
1.8.5
Environmental................................................................................................................ 19
SERVICE PHILOSOPHY ............................................................................................................ 20
2.1
2.2
SERVICE CONCEPT ................................................................................................................... 20
WARRANTY .............................................................................................................................. 20
2.2.1
Service Within and Out Of Warranty .............................................................................. 20
2.2.2
Ancillary Items ............................................................................................................... 20
2.3
SOFTWARE POLICY ................................................................................................................... 20
© TMC Radio 2006
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TNM-U-E-0002 Issue 1
SRM9000 SERIES SERVICE MANUAL
3.
3.1
3.2
3.3
3.4
3.5
3.6
4.
4.1
4.2
T EST EQUIPMENT ..................................................................................................................... 33
T EST SET-UP ........................................................................................................................... 35
4.2.1
COMMS Set up.............................................................................................................. 36
4.2.2
Radio Preparation .......................................................................................................... 37
4.2.3
Alignment Procedure...................................................................................................... 38
4.2.3.1 VCO DAC Alignment .......................................................................................... 38
4.2.3.2 TCXO (Radio Netting Adjustment) ...................................................................... 39
4.2.3.3 Rx Front End ...................................................................................................... 40
4.2.3.4 Mute Adjustment................................................................................................. 41
4.2.3.5 RSSI................................................................................................................... 42
4.2.3.6 Tx Power ............................................................................................................ 43
4.2.3.7 Modulation.......................................................................................................... 44
4.2.3.8 Programming...................................................................................................... 45
4.2.3.9 Customers Radio Personality Data ..................................................................... 45
REPLACEABLE PARTS............................................................................................................. 46
5.1
5.2
COMMON PARTS ...................................................................................................................... 46
BAND-SPECIFIC PARTS ............................................................................................................. 47
5.
6.
TECHNICAL DESCRIPTION ...................................................................................................... 22
RECEIVER ................................................................................................................................ 22
3.1.1
Front End Filters and RF Amplifier ................................................................................. 22
3.1.2
First Mixer and IF Section .............................................................................................. 22
3.1.3
Quadrature Demodulator................................................................................................ 22
3.1.4
Receiver Audio Processing ............................................................................................ 24
T RANSMITTER .......................................................................................................................... 25
3.2.1
Drivers and PA Stages................................................................................................... 25
3.2.2
Power Control ................................................................................................................ 25
3.2.3
Antenna Changeover and Harmonic Filter...................................................................... 25
3.2.4
Transmitter Audio Processing......................................................................................... 25
FREQUENCY SYNTHESISER ........................................................................................................ 26
3.3.1
General .......................................................................................................................... 26
3.3.2
PLL ................................................................................................................................ 27
3.3.3
VCO’s ............................................................................................................................ 27
3.3.4
Negative Bias Generator and Loop Filter........................................................................ 27
3.3.5
Phase Modulator ............................................................................................................ 27
3.3.6
Reference Oscillator....................................................................................................... 28
CONTROL ................................................................................................................................ 28
3.4.1
DSP and PLA................................................................................................................. 28
3.4.2
DSP Clock Oscillator...................................................................................................... 29
3.4.3
PLA PWM...................................................................................................................... 29
MEMORY ................................................................................................................................. 29
POWER SUPPLIES ..................................................................................................................... 31
3.6.1
Power On Function ........................................................................................................ 31
3.6.2
Power Supplies .............................................................................................................. 31
3.6.2.1 8V Regulator U900 ............................................................................................. 31
3.6.2.2 5V Regulator U901 ............................................................................................. 31
3.6.2.3 3.3V Regulator U912 .......................................................................................... 32
3.6.2.4 2.5V Regulator U903 .......................................................................................... 32
3.6.2.5 Negative Power Supply U904E/F........................................................................ 32
3.6.2.6 Unswitched Battery (13V8_UNSW_F)................................................................. 32
ALIGNMENT (LEVEL 3 SERVICE ONLY).................................................................................. 33
CIRCUIT DIAGRAMS ................................................................................................................. 47
© TMC Radio 2006
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TNM-U-E-0002 Issue 1
SRM9000 SERIES SERVICE MANUAL
6.1
ISSUE 9 CIRCUIT DIAGRAMS ...................................................................................................... 47
APPENDICES
APPENDIX A ~ GLOSSARY
APPENDIX B ~ TRANSCEIVER CONNECTIONS
APPENDIX C ~ SRM9010 MICROPHONE
APPENDIX D ~ SRM9020 MICROPHONE
APPENDIX E ~ SRM9022 MICROPHONE
APPENDIX F ~ SRM9030 CONTROL HEAD
APPENDIX G ~ ANCILLARIES
© TMC Radio 2006
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TNM-U-E-0002 Issue 1
SRM9000 SERIES SERVICE MANUAL
Declaration
The performance figures quoted are subject to normal manufacturing and service tolerances. The right is
reserved to alter the equipment described in this manual in the light of future technical development.
Copyright
All rights reserved. No part of this publication may be reproduced in any form or by any means without the
prior permission of TMC Radio.
Errors and Omissions
The usefulness of this publication depends upon the accuracy and completeness of the information
contained within it. Whilst every endeavour has been made to eliminate any errors, some may still exist. It
is requested that any errors or omissions noted should be reported to:
TMC Radio Pty Ltd.
1270 Ferntree Gully Road
Scoresby Vic
3179 Australia
Ph:
Fax:
Mob:
+61
+61
+61
3-9730-3800 (Direct: -3914)
3-9730-3968
408-160-661
E-mail: jkuhrt@tmcradio.com
www.tmcradio.com/
© TMC Radio 2006
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TNM-U-E-0002 Issue 1
SRM9000 SERIES SERVICE MANUAL
Document History
Issue
Date
Comments
January 2006
Initial issue
List of Associated Publications
Document No.
Description
Issue
TNM-I-E-0005
SRM9000 Series Installation Instructions
TNM-P-E-004
Selcall Product Manual
2.56
TNM-U-E-0012
SRM9020 Trunk Operating Instructions
TNM-U-E-0013
SRM9020 PMR Operating Instructions
TNM-U-E-0063
SRM9022 PMR Operating Instructions
TNM-U-E-0014
SRM9025 PMR Operating Instructions
TNM-U-E-0015
SRM9025 Trunk Operating Instructions
TNM-U-E-0003
SRM9030 PMR Operating Instructions
TNM-U-E-0004
SRM9030 Trunk Operating Instructions
TNM-U-E-0020
SRM9030 Brief User Guide
TNM-U-E-0042
SRM9010 Brief User Guide
TNM-U-E-0043
SRM9020 Brief User Guide
TNM-U-E-0044
SRM9025 Brief User Guide
© TMC Radio 2006
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SRM9000 SERIES SERVICE MANUAL
Warnings and Cautions
WARNING
Compliance with RF Energy Exposure Standards: To minimise exposure to RF fields during
equipment service and repair, the antenna terminal of the SRM9000 radio should be connected
to a suitable non-radiating RF load when the transmitter is in use.
WARNING
SRM9000 radio equipment is to be connected only to 12-volt negative earth systems. In vehicles
with a 24-volt supply, an approved 24V/12V converter must be used. The supply must not be
taken from a 12V tap on the battery.
WARNING
To avoid RF injury, do not touch the Antenna when the Transmitter is in use.
WARNING
Double-fused 12V Supply Leads, Antenna cables and Speaker wiring is to be routed as far
away as possible from gas or fuel lines or any electronic control device. The radio transceiver
and antenna are to be mounted as far away as possible from these devices and their cabling.
Equipment is to be installed, by a competent person, in accordance with the requirements of
local radio communications authorities and/or Health and Safety regulations.
Post installation checks should be performed to ensure that there is no effect on the operation
of the vehicle’s electronics.
WARNING
Do not operate your radio, without a handsfree kit, whilst driving a vehicle.
WARNING
Do not operate your radio in an explosive atmosphere. Obey the “Turn Off Two-way Radios”
signs where these are posted, e.g. on a petrol station forecourt.
Caution
During disassembly and assembly, refer to Torque Settings in Section 1.7
Caution
Customer configuration files should be saved prior to any alignment adjustments.
Preparing the radio for alignment will erase from the radio all customer PMR and Trunking
configuration data (channel, signalling information etc). The only data retained by the
Alignment Tool is the factory alignment data for the radio (DAC settings for Tx power, front-end
tuning etc).
© TMC Radio 2006
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SRM9000 SERIES SERVICE MANUAL
1.
INTRODUCTION
1.1
GENERAL
The SRM9000 series of FM mobile radio transceivers is designed for PMR and Trunked operation in VHF
and UHF radio systems.
The system is available in a number of functional variants. Each variant uses the standard SRM9000
mobile transceiver, which is software configured for different control ancillaries. The software configuration
together with the type of controller (Basic or Enhanced microphone, Handset, or Alphanumeric Control
Head) determines the radio features for the different variants as follows.
PMR/Trunked
Basic Telemetry Transceiver No Display or Control Head.
SRM9005
Low Range Version with Basic Fist Microphone.
SRM9010
Mid Range Version with Enhanced Alphanumeric Fist Microphone.
SRM9020
High-end Version with Graphics Display Handset.
SRM9022
High-end Version with Alpha Display Handset.
SRM9025
System Level Remote Control Head with Alpha capability and Handset /
Fist Microphone / Desk Microphone options.
SRM9030
1.2
SCOPE
This manual provides technical specifications, description and servicing details for the SRM9000 series of
mobile radio transceivers together with the related microphones and control heads.
Unless specifically stated otherwise, the text and illustrations refer to all versions in the series.
1.3
DESCRIPTION
The design concept utilises wide band analogue techniques for RF transmit and receive circuitry with digital
signal processing of analogue or digital modulation and demodulation. Electronic tuning is used throughout
the mobile to eliminate manual tuning and level adjustment.
A Digital Signal Processor (DSP) and a Programmable Gate Array (PLA) are used with other dedicated
devices in the SRM9000 to perform the following functions under software control:
•
Frequency Synthesis of all operating frequencies.
•
Modulation and demodulation of 10/12.5/20/25kHz FM signals on a per channel basis.
•
Modem functionality for specified data modulation schemes.
•
Filtering, pre-emphasis, de-emphasis, limiting, compression, muting, CTCSS, Selcall or any other
frequency or level dependent signal modification.
•
Serial communications with the Control Ancillaries and Alignment Tool.
•
Tuning Control data for Tx and Rx.
The SRM9000 Transceiver comprises a rugged extruded aluminium sleeve, which houses a single printed
circuit board assembly and provides all heatsink requirements. The sleeve housing is closed at each end
by high-impact plastic end caps; all cable ports and mechanical interfaces are sealed against moisture and
dust ingress.
The PCB assembly comprises a single, multi-layer PCB containing all the RF and control circuitry. The
PCB seats on an extruded aluminium tray that slides into the outer aluminium sleeve where it is secured
with screws accessed from the outside of the case. Provision is made under the main PCB tray assembly
for additional hardware options as well as optional accessories plugged directly into the main PCB.
There are two installation methods available for the SRM9000. The outer aluminium extrusion has side
flanges that allow the mobile to be bolted directly to any flat surface in the vehicle. A quick release cradle is
also available.
© TMC Radio 2006
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TNM-U-E-0002 Issue 1
SRM9000 SERIES SERVICE MANUAL
1.4
PRODUCT VARIANTS AND FACILITIES
Product variants and facilities are detailed in Table 1-1, Table 1-2 and Table 1-3.
Table 0-1 Common Features for All Variants
Feature:
Model:
9005
9010
9020
9022
9025
9030
Control
None or
Serial or
Parallel if
Option
Board
Display
Microphone
Display
Microphone
Controller
Microphone
Display
Handset
Control Unit
with
Microphone
Display
1 digit LED
6 char LCD
8x14 char
LCD
2x12 char
LCD
8x14 char
LCD
Graphics
102x64
pixels
Graphics
102x64
pixels
Adjustable Display
Illumination
Yes
Yes
Yes
Yes
Buttons and Keys
Vol Up/Down
Select
1 Function
Vol Up/Down
4 Function
Scroll
Up/Down
Vol Up/Down
6 Function
12 Keypad
Send/End
Menu + Scroll
6 Function
12 Keypad
Send/End
Menu +
Scroll
Speaker
Yes
Yes
Yes*
Vol Up/Down
6 Function
12 Keypad
Send/End
Menu +
Scroll
Yes*
Yes
66-88MHz, 136-174MHz, 174-208MHz, 208-245MHz, 335-375MHz,
400-480MHz, 440-520MHz
10/12.5/20/25kHz
Frequency Bands
Channel Spacing
Menu driven
Yes
Yes
Yes
Yes
Customisable Menus
Yes
Yes
Yes
Yes
* Note: Handsets have a built-in earpiece, therefore an external speaker is optional.
© TMC Radio 2006
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TNM-U-E-0002 Issue 1
SRM9000 SERIES SERVICE MANUAL
Table 0-2 Conventional-PMR Variants
Feature:
Model:
9005
9010
9020
9022
9025
9030
Channels
1000
10
100 +
1000
1000
1000
Signalling
CTCSS/DCS
CTCSS/DCS
ANI
CTCSS/DCS
Selcall
CTCSS/DCS
Selcall
CTCSS/DCS
Selcall
CTCSS/DCS
Selcall
Attack Operation
Yes
Yes
Yes
Yes
Yes
DTMF Encode
2 Fixed Seq
2 Fixed Seq
Yes
Yes
Yes
MPT1327 Trunking
Yes
Programmable
User
selectable
User
selectable
User
selectable
User
selectable
PTT Limit Timer
with warning beeps
Yes
Busy Channel
Lockout
Yes
PTT Inhibit on Busy
Yes
Scanning
Yes
10 groups
of up to 16
channels
per group.
10 groups
of up to 16
channels
per group, 4
user defined
scan
groups.
124 groups of up to 16 channels per group, 4
user defined scan groups.
Voting
Yes
10 fixed
groups
consisting
of up to 16
channels
per group.
Up to 200 groups consisting of up to 16 channels per group.
Yes
Priority Scanning
Nuisance Delete
Yes
Yes
Yes
Yes
Phonebook
250 entries
250 entries
250 entries
250 entries
Yes
Option
Yes
Multiax
Mod/Demod
Function
Option
Yes
Ignition Sense Input
VOX Handsfree
Option
Option
Option
Option
Option
600 Ohm Interface
SIB
DMAP
Option
ASI Standard
Option
ASI with GPS
Option
Direct GPS
Option
RSM with GPS
Option
P25
Option
Audio Discriminator
Option
© TMC Radio 2006
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SRM9000 SERIES SERVICE MANUAL
Table 0-3 Trunked Variants
Feature:
Model:
9005
9010
9020
9022
9025
9030
Channels
1024 channels in 50 sub-bands
Frequency Bands
Specifically: 136-174MHz, 400-450MHz (and possible in all other bands)
Background Hunt
and Vote-Now
Yes
Yes
Yes
Yes
Yes
Yes
MPT1343 dial strings
Yes
Yes
Yes
Yes
Yes
Yes
ANN Numbering
Yes
Yes
Yes
Phonebook
Memories
250
10
100+
250
250
250
User Phonebook
Recall
entries
configured
by FPP only
Recall
entries
configured
by FPP only.
Recall
entries
configured
by FPP only
Recall and
edit.
Recall and
edit.
Recall and
edit.
Alpha Status List
Yes
Yes
Yes
Yes
SDM/EDMs
Yes
Yes
Yes
Yes
NPDs
Yes
TBA
TBA
TBA
Mod/Demod
Function
Option
Attack Operation
Yes
Yes
Yes
Yes
Yes
Yes
Ignition Sense Input
Yes
Yes
Yes
Yes
Yes
Yes
VOX Handsfree
Option
Option
Option
Yes*
Yes*
Yes*
General External IO
Option
Option
Option
Option
Option
Option
600 Ohm Interface
Option
Option
Option
Option
Option
Option
* Note:
Requires external microphone for optimum performance.
© TMC Radio 2006
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SRM9000 SERIES SERVICE MANUAL
1.5
SOFTWARE VERSIONS AND NAMING
There are various associated items of Software (SW) required for the SRM9000 radio and programmer to
operate. This section simply defines the naming rules of the SW files to allow identification and conformity.
This allows different versions of SW to be distributed and co-exist without confusion.
The SRM9000 Transceiver has three items of SW for digital and analogue PMR, Trunking and Alignment.
The 9022/9025 Controller Mic/Handsets have one SW file for their PIC’s and 9030 Control Head has two
SW files for its Flash and EEPROM.
Filename Structure
1.5.1
Basically the Filename Structure is defined as follows:
•
2 character Application code
•
2 or 3 character SW Type code
•
3 character version number
•
File Extension as required.
eg.
99tm533.bin
99p_533.bin
99s_533.bin
99cf101.hex
99ce101.hex
Application Code
1.5.2
This identifies the application the SW was initially designed for:
9k
Standard SRM9000 Pre-Rev 9 Software
99
Standard SRM9000 Rev 9 Software
ak
SRM9000 Pre-Rev 9 Software applicable for SRP9022
a9
SRM9000 Rev 9 Software applicable for SRP9022
rw
Specific SW for Raywood Taxi Applications
Software Type Code
1.5.3
This identifies different types of SW within an application.
s_
Startup
p_
Standard PMR. DMAP or No option board
p_s
PMR with Scrambler/Discriminator option board
p_g
PMR with Direct GPS
p_a
PMR with ASI Map27option board
p_u
PMR with ASI SUP option board
p_q
PMR with ASI-G Map27option board
a__
9022 Standard PMR. DMAP or No option board
a_s
9022 PMR with Scrambler/Discriminator option board
a_g
9022 PMR with Direct GPS
© TMC Radio 2006
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TNM-U-E-0002 Issue 1
SRM9000 SERIES SERVICE MANUAL
a_a
9022 PMR with ASI Map27option board
a_u
9022 PMR with ASI SUP option board
a_q
9022 PMR with ASI-G Map27option board
tm
Standard MPT1343 Trunking. DMAP or No option board
ta
Standard ANN Trunking. DMAP or No option board
tb
Basic (9010/9020) MPT1343 Trunking. DMAP or No option board
tmg
Standard MPT1343 Trunking. Direct GPS option board
tag
Standard ANN Trunking. Direct GPS option board
tbg
Basic (9010/9020) MPT1343 Trunking. Direct GPS option board
tma
Standard MPT1343 Trunking. ASI Map27 option board
taa
Standard ANN Trunking. ASI Map27 option board
tba
Basic (9010/9020) MPT1343 Trunking. ASI Map27 option board
tmu
Standard MPT1343 Trunking. ASI SUP option board
tau
Standard ANN Trunking. ASI SUP option board
tbu
Basic (9010/9020) MPT1343 Trunking. ASI SUP option board
tmq
Standard MPT1343 Trunking. ASI-G option board
taq
Standard ANN Trunking. ASI-G option board
tbq
Basic (9010/9020) MPT1343 Trunking. ASI-G option board
TBD
9022 Trunking
bo
Transceiver Boot-code
bc
Transceiver Boot-Backup-code
bf
Transceiver PLA-code
ba
Transceiver PLA-Backup-code
Note. The above file names are not stored within the code. As a consequence, when the radio is read by the
FPP, the FPP will display version numbers and release dates for the Backup, Startup, PMR, TMR and
DMAP codes. The Bootloader, PLA Backup and PLA codes show release dates only.
© TMC Radio 2006
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SRM9000 SERIES SERVICE MANUAL
1.5.4
Version Number
This is a 3-digit number allocated by Engineering to identify the SW version.
e.g.
1.5.5
103
Version 1.03
Exclusions
The Programmer SW does not follow the above rules as it is a PC based Program and its version number
can be easily identified by starting the SW. Later releases of SW will be backward compatible, unless
deliberately not so, in which case a different directory structure/path may be implemented.
1.5.6
Displaying Software Versions
Each Transceiver SW code file (e.g. 99tm533.bin, etc.) contains version information about itself and
possibly compatible Programming SW.
For Radio SW saved on Disk, this information can be displayed via the Programmer function:
Options : Upgrade_Software : Get_File
For Software loaded in the radio, information can be read from the Transceiver and displayed via the
Programmer function:
Options : Radio_Information
© TMC Radio 2006
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SRM9030 Control Head SW can be displayed on the Control Head by holding the ‘3’ button down when the
radio is switched on. This is only implemented in CH V1.06 SW (Oct/2000) and later.
SRM9025 Handset SW has a similar method of Version identification.
SRM9020 Microphone SW has a similar method of Version identification.
SRM9022 Handset SW can be displayed by pressing the top side button when the radio is switched on.
SRM9010 Microphone does not have any method of determining loaded SW. There is only one version of
this SW in the field.
1.5.7
Automatic Version Upgrade Prompting
When a configuration is downloaded to the Transceiver, the Programmer performs a brief check on the SW
currently installed in the radio. If a later version of SW exists (on PC hard-disk) then the Programmer will
prompt the user with the following message:
NOTE. As early versions of FPP cannot recognise a more recent revision of the radio, it is important that
the latest FPP version is downloaded from http://www.tmcradio.com.
If YES is selected, the Transceiver Radio code is updated before the new configuration is downloaded.
If NO is selected, only the configuration is downloaded.
This process also updates the Startup code to ensure it is compatible with the loaded PMR or Trunk code.
Note : If the …\SRM9000\FPP\RadioSW folder contains no files, then the above check will not be
performed.
© TMC Radio 2006
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SRM9000 SERIES SERVICE MANUAL
Transceiver SW Description, Start-up and Backup-Software
1.5.8
The SRM9000 Transceiver software is split into the following separate modules:
•
Bootloader and Backup Software
•
Start-Up Software
•
PLA and PLA-Backup Software
•
Mainline PMR Software
•
Mainline Trunk Software
When the Transceiver starts, it basically performs the following steps:
•
Initial execution starts with the Bootloader code, which attempts to load the Start-Up Software (if
Start-Up checksum is bad, then the Backup Software is loaded.)
•
Start-Up Software then downloads the PLA code (or PLA-Backup code if PLA checksum is bad)
to the PLA device. If both PLA and PLA-Backup checksums are bad then the radio is not
operational and serial communication is not possible.
•
Start-Up Software then reads the On/Off switch plus Ignition-Sense lines and compares these
with saved parameters to determine if the radio should be continue to power-up or switch itself off
again.
•
Start-Up software then attempts to load either PMR or Trunk Mainline Software (dependent on
saved parameter) and switches execution to complete the power-up process and start normal
operation.
If the Mainline Software cannot be loaded, or a Job file configuration has not been loaded (e.g. nonexistent or checksum fail) then execution switches to Backup Software until the error is corrected (e.g. by
FPPing the radio).
There are three states that the radio can configure after switch-on:
1.5.9
•
Mainline Trunk Software or Mainline PMR Software (normal power-up)
If the radio does not have a valid Job file configuration loaded, then it will display a “No PMR Cfg”
or “No TMR Cfg” message.
•
Start-Up Software (characterised by “Alignment Mode” shown on the display). This is also the
code that is running when the radio is being aligned using the Alignment Tool.
•
Backup Software (via various paths from above.)
Wailing Siren (Boot-up Software Corrupted)
A “WAILING SIREN” sound is emitted from the Loudspeaker while the radio is running in Boot Backup
Software. In this mode the FPP can be used to re-load a Jobfile, or re-load Start-Up or Mainline Operating
Software.
Simply writing a Jobfile to the radio should allow the FPP to determine and update the offending software –
however there may be instances where the FPP cannot determine this and the Start-Up and Mainline
Software should be updated manually. This can be done using the FPP : Upgrade_Software : Get_File …
then Download. Both Start-Up Software (filename = 99s_xxx.bin) and Mainline PMR (99p_xxx.bin) or
Trunk (99txxxx.bin) should be loaded if the FPP cannot automatically fix the problem. The wailing siren
should stop once the problem is fixed.
Note:
1.6
Should these steps fail to restore the set and the Wailing Siren cease, the radio will need to be
returned to a Level 3 Service Centre for FLASH replacement.
ADJUSTMENT AND ALIGNMENT
There are no manual internal adjustments in the SRM9000. Re-programming and alignment is done using
software tools with the PCB installed in its chassis. For servicing, the radio PCB can be operated as a
stand alone unit provided a temporary heatsink is fitted under the transmitter PA module for transmitter
© TMC Radio 2006
page 9
TNM-U-E-0002 Issue 1
SRM9000 SERIES SERVICE MANUAL
servicing and that the receiver audio output be kept below 100mW for receiver servicing. Radio
performance is not adversely affected by operating without the outer sleeve but there will be some change
to performance when the metal cans are removed from the RF sections of the board.
On re-assembly, the PA module should be checked for a thin layer of heat-conducting paste. If this is
missing or dried-out, it should be replaced prior to re-assembly.
1.7
CHASSIS ASSEMBLY
Important - Take Note!
1.7.1
Torque Settings
Assembly of 'Chassis' (Inner Extrusion) to 'Outer Extrusion' 1.4 Nm (PA x 2), 1.25Nm (Others x 3)
Assembly of 'Front' and 'Rear' end-caps to 'Outer Extrusion' 1.4 Nm.
1.7.2
Thermal Compound Application
For radios using a PA tray without full bottom surface with no cut-out, no thermal compound is necessary.
However, on later radios that have a tray containing a cut-out section in the bottom, just enough thermal
compound should be applied to provide good thermal contact with the chassis.
Note. If thermal compound is old and difficult to spread, it should be discarded.
1.7.3
Assembly
The Inner extrusion should initially be fitted to the PCB and the assembly then slid into place within the
chassis.
Then by holding the inner extrusion upwards by hand, it is then important to insert all screws by hand and
ensure they have been fully inserted through the PCB, thereby locating the assembly correctly.
Still holding the inner extrusion upwards to ensure the assembly does not twist, lightly torque up the centre
screw of the row of three followed by the PA module mounting screw towards the middle of the chassis.
The remaining screws can then be screwed up to full torque followed by re-torque of the first two screws
again.
1.8
1.8.1
SPECIFICATION
General
Operation
Single or two frequency simplex (half-duplex).
Modulation
Frequency modulation (phase) F3E, F1D, F1E.
Operational Temperature Range
-30°C to 60°C
Supply Voltage Requirements
10.8V to 16.3V DC negative earth (13.8V nom.)
Current Consumption
Mobile With Control Mic
Mobile With Alpha Mic
Mobile With Alpha
Head
Radio off
≤ 5mA
≤ 5mA
≤ 5mA
Standby (squelched):
≤ 200mA
≤ 210mA
≤ 210mA*
© TMC Radio 2006
page 10
TNM-U-E-0002 Issue 1
SRM9000 SERIES SERVICE MANUAL
Rx Audio O/P:
300mW (not bridged)
≤ 450mA
≤ 470mA
≤ 500mA *
4.0W
≤ 1200mA
≤ 1220mA
≤ 1250mA*
Transmit:
VHF
UHF
25W
≤ 6.5A
≤ 6.5A
≤ 1.5A
≤ 1.5A
1W
*Add 250mA to current consumption for Control Head with backlight on.
Frequency Bands
Frequency Range
Band
Frequency Range
E0
66 - 88 MHz
R1
335 - 375MHz
AC
136 - 174MHz
TU
400 - 480MHz
K1
174 - 208MHz
UW
440 - 520MHz
KM
208 -245MHz
Switching Bandwidth
Radio covers the complete band without retuning
Channel Spacing
10/ 12.5 / 20 / 25kHz
Frequency Stability (-30°C to
60°C)
Less than ±2.0ppm
Dimensions (mm)
Height
Width
Depth
Transceiver
56
170
165
9010/30 Microphone
91*
62
38
9020 Alpha Display Microphone
96*
70
42
9022 Graphics Display Controller
Mic
145*
68
30
165*
52
30
9025 Alpha Display Handset
65
188
46
9030 Graphics Display Control
Head
300
120
130
200
50
40
9030 Desk Microphone
9030 Handset
* Does not include cable or strain relief
Weight
Transceiver 1.8kg
Conformance Approvals
ETS
EN 300 086 *
EN 300 113 *
* Pending in some cases
© TMC Radio 2006
EN 300 489 *
Australia
EN 300 219 *
AS4295 *
USA
FCC (AC, UW)
page 11
TNM-U-E-0002 Issue 1
SRM9000 SERIES SERVICE MANUAL
1.8.2
Transmitter
Power Output
Any two levels programmable from
High Power:
25W
Adjustable down to 1W
Low Power:
1W
Adjustable up to 25W
Transmitter Rise Time
Less than 40 ms
Duty Cycle
1 minute transmit: 4 minutes receive
Spurious Emissions
< 0.25uW (9kHz to 1GHz)
< 1.0uW (1GHz to 4GHz)
Residual Noise
60% deviation. CCITT Weighted
25kHz Channel Spacing
>45dB
12.5kHz Channel Spacing
>40dB
Audio Frequency Distortion
≤ 3% (at 60% deviation)
Audio Frequency Response
300 to 3000Hz* +1dB -3dB
Figures apply for a flat audio response or a 6dB/octave preemphasis curve
(*2550Hz for 12.5kHz channel spacing)
Audio Sensitivity (1kHz)
RJ8 Connector: 40mV±2dB
(User programmable via FPP)
Option Audio: 40mV±2dB
© TMC Radio 2006
page 12
TNM-U-E-0002 Issue 1
SRM9000 SERIES SERVICE MANUAL
1.8.3
ETS
Receiver
Sensitivity
AS4295
≤0.5µV PD (-113dBm) for 20dB
SINAD
≤0.3µV PD (-117.5dBm) for 12dB
SINAD
≤0.5µV PD (-113dBm) for 20 dB
Quieting.
Adjacent Channel
Selectivity
25kHz Channel Spacing: >73dB
25kHz Channel Spacing: >73dB
12.5kHz Channel Spacing: >60dB
12.5kHz Channel Spacing: >65dB
Intermodulation Rejection
>65dB
>70dB
Spurious Response
Rejection
>70dB
>73dB
Blocking
>95dB
>95dB
Conducted Spurious
Emissions
<2nW (-57dBm) - 9kHz to 1GHz
<20nW (-47dBm) - 9kHz to 4GHz
<20nW (-47dBm) - 1GHz to 4GHz
GENERAL
FM Residual Noise
(CCITT weighted)
25kHz Channel Spacing:
>45dB
12.5kHz Channel Spacing:
>40dB
Mute Range
Typically 6dB to 25dB SINAD
Typical setting 10dB to 12dB SINAD
Mute Response Time
<30mS (no CTCSS)
Add 200mS for CTCSS
Voting Response Time
Searches at 50ms/channel
Audio Distortion
4W into 4Ω at <5% distortion
Audio Frequency
Response
300 to 3000Hz*: +1dB to -3dB
Figures apply for a flat audio response or a 6dB/octave de-emphasis curve
(*2550Hz for 12.5kHz channel spacing)
Deviation Sensitivity
(for rated audio at 1kHz)
Option Audio Output at
60% MSD (P1-23)
Option Audio Output at
60% MSD (P2-15)
Handset Audio (S1-6)
© TMC Radio 2006
Speaker: 20% MSD±3dB
Standard build: Flat Unsquelched Audio: 200mV±1dB RMS-O/C (R871=NF,
R872=0R, R82=NF on Rev 9C or 0R/1k on Rev 9B), Flat Squelched Audio:
450mV±2dB RMS-O/C at Rated Speaker Audio (R871=1k or 0R, R872=NF,
R82=NF).
Standard build: Flat Unsquelched Audio: 160mV±1dB RMS (600 ohms) R871=1k,
R82=1k, C857=NF: Flat Squelched Audio: 88mV±2dB RMS (600 ohms) at Rated
Speaker Audio.
230mV±2dB RMS (600 ohms) at Rated Speaker Audio.
page 13
TNM-U-E-0002 Issue 1
SRM9000 SERIES SERVICE MANUAL
Signalling
1.8.4
1.8.4.1 CTCSS
All 38 standard CTCSS Tones are supported as per the table below.
Identifier
Frequency
Identifier
Frequency
Identifier
Frequency
67.0
107.2
167.9
71.9
110.9
173.8
74.4
114.8
179.9
77.0
118.8
186.2
79.7
123.0
192.8
82.5
127.3
203.5
85.4
131.8
210.7
88.5
136.5
218.1
91.5
141.3
885.7
94.8
146.2
223.6
97.4
151.4
241.8
100
156.7
250.3
103.5
162.2
‘‘
NONE
Encoder
Tone Deviation:
25kHz channel spacing
500 to 750Hz
20kHz channel spacing
400 to 600Hz
12.5kHz channel spacing
250 to 375Hz
Tone Distortion
Less than 5.0%
Frequency Error
Less than ±0.5%
© TMC Radio 2006
page 14
TNM-U-E-0002 Issue 1
SRM9000 SERIES SERVICE MANUAL
Decoder
Bandwidth
Not greater than ±3.0%
Deviation Sensitivity
Less than 6.0% of system deviation (for decode with full RF quieting)
Noise Immunity
Less than 500ms dropout per minute at 10dB SINAD
(CTCSS tone deviation 10% of system deviation. RF deviation 60% at
1000Hz).
False Decode Rate
Less than 5 false decodes per minute (no carrier input)
Talk-off
For no dropouts in one minute, interfering tone at 90% of system deviation
(CTCSS tone at 10% of system deviation).
Response Time
Full quieting signal:
310Hz to 3000Hz
20dB SINAD RF signal:
320Hz to 3000Hz
12dB SINAD RF signal:
350Hz to 3000Hz
Less than 250ms (full quieting/tone >100Hz)
Less than 350ms (full quieting/tone <100Hz)
De-Response Time
Less than 250ms
Reverse Tone Burst
none
1.8.4.2 FFSK
1200 Baud : 1200 / 1800 Hz MPT1317 based
2400 Baud : 1200 / 2400 Hz MPT1317 based
1.8.4.3 Selcall
The following tone sets are supported as per tables below:
•
ST-500:
CCIR, EEA, ZVEI, DZVEI, EIA
•
ST500/CML:
ZVEI_3, DZVEI
•
CML:
CCIR, EEA, ZVEI
•
SIGTEC:
CCIR, CCIRH, EEA, ZVEI_1, XVEI_2, ZVEI_3, NATEL, EIA
•
SEPAC:
CCIR, EEA, ZVEI_1, ZVEI_2, ZVEI_3, EIA
© TMC Radio 2006
page 15
TNM-U-E-0002 Issue 1
SRM9000 SERIES SERVICE MANUAL
Selcall Tone Frequency Table
Tone
CML
ST500
SIGTEC SIGTEC SEPAC
CML
ST500
SIGTEC
CCIR
CCIR
CCIR
CCIRH
CCIR
EEA
EEA
EEA
1981
1981
1981
1981
1981
1981
1981
1981
1124
1124
1124
1124
1124
1124
1124
1124
1197
1197
1197
1197
1197
1197
1197
1197
1275
1275
1275
1275
1275
1275
1275
1275
1358
1358
1358
1358
1358
1358
1358
1358
1446
1446
1446
1446
1446
1446
1446
1446
1540
1540
1540
1540
1540
1540
1540
1540
1640
1640
1640
1640
1640
1640
1640
1640
1747
1747
1747
1747
1747
1747
1747
1747
1860
1860
1860
1860
1860
1860
1860
1860
2400
1055
2110
2400
2400
1055
1055
2110
930
....
2400
930
1055
930
....
1055
2247
2400
1055
2247
2247
2247
2400
2400
991
....
2247
991
991
991
....
2247
2110
2110
930
2110
2110
2110
2110
930
....
....
991
1055
....
....
....
991
SEPAC
CML
ST500
SIGTEC SEPAC
SIGTEC SEPAC
SIGTEC
EEA
ZVEI
ZVEI
ZVEI-1
ZVEI-1
ZVEI-2
ZVEI-2
ZVEI-3
1981
2400
2400
2400
2400
2400
2400
2200
1124
1060
1060
1060
1060
1060
1060
970
1197
1160
1160
1160
1160
1160
1160
1060
1275
1270
1270
1270
1270
1270
1270
1160
1358
1400
1400
1400
1400
1400
1400
1270
1446
1530
1446
1446
1446
1446
1446
1400
1540
1670
1670
1670
1670
1670
1670
1530
1640
1830
1830
1830
1830
1830
1830
1670
1747
2000
2000
2000
2000
2000
2000
1830
1860
2200
2200
2200
2200
2200
2200
2000
1055
2800
970
2600
2800
970
885
2400
970
810
....
2800
970
885
741
885
2247
970
2800
741
885
741
2600
741
2400
886
....
970
....
2600
....
2600
2110
2600
2600
810
2600
2800
970
2800
....
....
....
886
....
600
....
600
Tone
© TMC Radio 2006
page 16
TNM-U-E-0002 Issue 1
SRM9000 SERIES SERVICE MANUAL
Tone
SEPAC
ST500/CML
ST500
SIGTEC SIGTEC SEPAC
ST500
ZVEI-3
ZVEI-3
DZVEI
DZVEI
NATEL
EIA
EIA
EIA
2200
2400
2200
2200
1633
600
600
600
970
1060
970
970
631
741
741
741
1060
1160
1060
1060
697
882
882
882
1160
1270
1160
1160
770
1023
1023
1023
1270
1400
1270
1270
852
1164
1164
1164
1400
1530
1400
1400
941
1305
1305
1305
1530
1670
1530
1530
1040
1446
1446
1446
1670
1830
1670
1670
1209
1587
1587
1587
1830
2000
1830
1830
1336
1728
1728
1728
2000
2200
2000
2000
1477
1869
1869
1869
885
885
2600
825
1805
459
2151
2151
741
....
....
1995
2151
1091
....
2600
2010
....
....
810
886
2600
1300
2600
2400
....
810
....
1700
2010
....
....
2400
970
2400
2400
2175
2433
459
459
....
....
....
....
2937
2292
....
....
Selcall Tone Periods
The Selcall tone period:
4 preset lengths selectable: 20ms and 30 seconds in 1ms increments.
1.8.4.4 DTMF
DTMF Encode supported via keypad:
TONES
1209Hz
1336Hz
1477Hz
697Hz
770Hz
852Hz
941Hz
Tone Period, programmable: 0 – 2.55s in 10ms steps.
Inter-Tone Period, programmable: 0 – 2.55s in 10ms steps.
Link Establishment Time, programmable: 0 - 10s in 10ms steps.
Tx Hang Time, programmable: 0 – 9.99s in 10ms steps.
Side-Tone in Loudspeaker: selectable via programmer
© TMC Radio 2006
page 17
TNM-U-E-0002 Issue 1
SRM9000 SERIES SERVICE MANUAL
1.8.4.5 DCS
Data rate
134 bits per second, frequency modulated
7.46ms/bit
171.6ms per codeword continuously repeating
0.5kHz for 12.5kHz systems
1kHz for 25kHz systems
23 bits comprising:
8 bits - DCS code (3 octal digits 000-777)
3 bits - Fixed octal code 4
11 bits - CRC (error detection) code
104 codes from 512 theoretically possible codes – see below
200ms 134Hz tone at PTT release
Deviation
Codeword size
Available Codes
Turn off code
DCS Codes can be Transmitted “Normal” or “Inverted” (programmable).
The radio can Receive DCS codes in either Transmitted “Normal” or “Inverted” or both (selectable via
programmer).
023
025
026
031
032
036
043
047
051
053
054
065
071
072
073
074
114
115
116
122
125
131
132
134
143
145
152
155
156
162
165
172
174
205
212
223
225
226
243
244
245
246
251
252
Valid DCS Codes
255
261
263
265
266
271
274
306
311
315
325
331
332
343
346
351
356
364
365
371
411
412
413
423
431
432
445
446
452
454
455
462
464
465
466
503
506
516
523
526
532
546
565
606
612
624
627
631
632
654
662
664
703
712
723
731
732
734
743
754
1.8.4.6 C4FM
Digital speech format in accordance with TIA/EIA 102 requirements.
© TMC Radio 2006
page 18
TNM-U-E-0002 Issue 1
SRM9000 SERIES SERVICE MANUAL
1.8.5
Environmental
Note: Operation of the equipment is possible beyond the limits stated but is not guaranteed.
Operational Temperature
-30°C to +60°C
Storage Temperature
-40°C to +80°C
Vibration Specification
IEC 68-2-6 with additional frequency acceleration from 60 – 150Hz
Check
Cold
IEC 68-2-1 Test 5 hours at -10°C –30°C
Dry Heat
IEC 68-2-2 Test 5 hours at +55°C +60°C
Damp Heat Cycle
IEC 68-2-30 Test 2 cycles at +40°C
Product Sealing
Main Radio Unit:
Microphones:
Remote Control Head
IEC529 rating IP54
IEC529 rating IP54
IEC529 rating IP54
MIL STD810
Low Pressure
High Temperature Storage
High Temperature Operation
Low Temperature Storage
Low Temperature Operation
Temperature Shock
Humidity
Sand and Dust
Random Vibration
Transit Drop
Functional Shock of severity 25g
Acceleration, 6ms pulse duration,
500 shocks in 6 directions.
© TMC Radio 2006
500.4 Procedure II
501.4 Procedure I
501.4 Procedure II
502.4 Procedure I
502.4 Procedure II
503.4 Procedure I
507.4 Figure 507.4-1
510.4 Procedure I – Blowing Dust
514.5 Figure 514.5C-1
516.5 Table 516.5-V1
page 19
TNM-U-E-0002 Issue 1
SRM9000 SERIES SERVICE MANUAL
2.
SERVICE PHILOSOPHY
2.1
SERVICE CONCEPT
The SRM9000 series has been designed to provide low cost trunked, non-trunked analogue and digital
speech mobile transceivers, using common core electronics, software and interfacing. It is a requirement
that once the customer has purchased equipment, TMC Radio can follow this by providing an ongoing, high
level of customer support together with a competitive and professional servicing activity.
There are three levels of service available:
Level
Activity
Recommended Spares
Recommended Test
Equipment
Replacement of complete
transceiver/antenna/fuses
Reprogramming
Antennas, Fuses
Ancillaries
Multimeter P.C.
Replacement of PCB or
mechanical component
replacement, Cosmetic repair
Listed in Level 2 Spares
Schedule
As above + service aids and
test equipment
Repair by PCB or mechanical
component replacement,
Cosmetic repair.
Listed in Level 2 Spares
Schedule
As above + service aids and
test equipment
Repair of Radio PCB to
component level in CRU.
Radio PCB components
only available to CRU.
2.2
Radio software
Programmer
WARRANTY
Initially, the normal 12-month warranty will apply to all radios and ancillaries.
2.2.1
Service Within and Out Of Warranty
The field Service Level for the SRM9000 mobile is LEVEL 2, PCB replacement.
LEVEL 2 Service, PCB (only) and case part replacement, will be carried out in field repair workshops, or the
Central Repair Unit (CRU) if required.
LEVEL 3 Service (Radio PCB component level repair) will ONLY be carried out in the Central Repair Unit.
For this, the complete radio must be returned to the CRU.
A PCB replacement program may be offered by the CRU in some countries.
2.2.2
Ancillary Items
All ancillary items (except remote alphanumeric control head) are Level 1 service.
These items should be replaced if faulty; they are non-repairable, and non-returnable to the CRU.
2.3
SOFTWARE POLICY
Software provided by TMC Radio shall remain the Company's property, or that of its licensors and the
customer recognises the confidential nature of the rights owned by the Company.
The customer is granted a personal, non-exclusive, non-transferable limited right of use of such software in
machine-readable form in direct connection with the equipment for which it was supplied only.
In certain circumstances the customer may be required to enter into a separate licence agreement and pay
a licence fee, which will be negotiated at the time of the contract.
© TMC Radio 2006
page 20
TNM-U-E-0002 Issue 1
SRM9000 SERIES SERVICE MANUAL
The customer undertakes not to disclose any part of the software to third parties without the Company's
written consent, nor to copy or modify any software. The Company may, at its discretion, carry out minor
modifications to software. Major modifications may be undertaken under a separate agreement, and will be
charged separately.
All software is covered by a warranty of 3 months from delivery, and within this warranty period the
Company will correct errors or defects, or at its option, arrange free-of-charge replacement against return of
defective material.
Other than in the clause above, the Company makes no representations or warranties, expressed or implied
such, by way of example, but not of limitation regarding merchantable quality or fitness for any particular
purpose, or that the software is error free, the Company does not accept liability with respect to any claims
for loss of profits or of contracts, or of any other loss of any kind whatsoever on account of use of software
and copies thereof.
© TMC Radio 2006
page 21
TNM-U-E-0002 Issue 1
SRM9000 SERIES SERVICE MANUAL
3.
3.1
TECHNICAL DESCRIPTION
RECEIVER
Refer to Figure 3-1.
3.1.1
Front End Filters and RF Amplifier
The receiver input signal from the antenna passes through the harmonic filter and antenna switch. With the
mobile in receive mode, diodes D580, D540a and D541a in the antenna switch are reverse biased allowing
the receiver input signal to be coupled through to the receiver front-end with minimal loss. The overall
insertion loss of the harmonic filter and switch is approximately 0.8dB.
A noise blanker is also fitted to E0 band radios. The noise blanker samples the received signal and gates
the 45MHz signal in the IF stage in the event that high level noise transients are received. Due to inherent
time delays in the bandpass filters prior to the blanking gate, gating synchronisation occurs before the
transients can adversely affect the following stages.
Varactor-tuned bandpass filters at the input and output of the RF amplifier provide receiver front-end
selectivity. Varactor tuning voltages are derived from the alignment data stored in the radio. The DSP
processes this data to optimise front end tuning relative to the programmed channel frequencies, which may
be changed at any time without re-aligning the radio.
To achieve the required varactor tuning range an arrangement of positive and negative bias power supplies
is used to provide a total bias across the varactors of up to 14.0VDC. A fixed 2.5V positive bias derived
from the 5.0V supply and voltage divider R425/R426 is applied to the cathodes of the varactor diodes. The
negative bias supply originates at the DSP/PLA as a PWM signal (FE TUNE) for the four front-end tuning
voltages TUNE1 to 4, for the particular channel frequency selected. The PWM signal is dependent on
channel frequency and tuning and passes through level shifting transistors Q404 to Q411 where it is
converted to a negative voltage in the range -0.5V to -11.5V. The -12.0V rail of the level translators is
generated by U904E/F with D903 to D906 providing the required voltage multiplication.
The RF amplifier stage comprises a low noise transistor amplifier Q400 that is compensated to maintain
good linearity and low noise matching. This provides excellent intermodulation and blocking performance
across the full operating range. The overall gain of the front-end is typically 14dB for all bands.
3.1.2
First Mixer and IF Section
The output of the last front-end bandpass filter is coupled into single balanced mixer T400/D413 which
converts the RF signal to an IF frequency of 45MHz. The local oscillator injection level is typically +8dBm at
T400 pin 1 with low side injection used for UHF bands and high side for VHF bands.
Following the mixer is IF amplifier Q401 that provides approximately 15dB of gain and in association with
its output circuitry, presents the required load conditions to the 4 pole 45MHz crystal filters Z401A/Z401B.
The crystal filters provide part the required selectivity for adjacent channel operation with the remaining
selectivity provided by a DSP bandpass filter algorithm.
3.1.3
Quadrature Demodulator
Additional IF gain of approximately 44dB occurs in U401, which is a dedicated IF AGC amplifier/Quadrature
Demodulator. The AGC voltage for U401 is derived from the RSSI function of the DSP. The onset of AGC
operation occurs when RF input signal level at the antenna connector exceeds -90dBm and can reduce the
gain by approximately 100dB for strong signals.
Conversion of the 45MHz IF signal to I and Q baseband signals is carried out by the demodulator section of
U401. The 90MHz local oscillator signal is generated by VCO Q402 which is phase locked by the auxiliary
PLL output of U701 via feedback signal AUX_LO2.
© TMC Radio 2006
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TNM-U-E-0002 Issue 1
© TMC Radio 2006
page 23
SPKR_OUT 2
SPKR_OUT 1
AUDIO_OUT 3
(Option Audio)
AUDIO_OUT 1
(Option Audio)
AUDIO_OUT 2
( H/S Audio)
Antenna
Filter
L582,
L584 &
L585
Speaker
Amp
U805
EN 3
Rx Audio Mode3
U806B
(Rev9C+ only)
EN 1
Rx Audio Mode1
U806C
(Rev9C+ only)
From PLA
Antenna
Switch
D580/
D540/D541
To TX PA
RX_PSU
CPP
AF Amp
U802A
SPKR_ON
De-emphasis
Network
EN 2
RF Amp
Q400
TUNE_1, 2, 3 & 4
RX VCO
Switch
Q601
RX VCO
Q600
Rx Audio
Mode 2
U302C
Speaker
Switch
Q810/
Q811/Q813
Bandpass
Filter
VCO Control Volts
Synthesiser
U701
EN 4
Rx Audio
Gate
U302B
AF Amp
U803A
Bandpass
Filter
RX_PSU
TX Mod Out
To TX VCO
TX_MOD
Tx/Disc AF
Switch
U801B
GAIN
Aux Gain
Switch U806A
(Rev9C+only)
Mixer
T400
AF Amp
U803B
IF Amp
Q401
CODEC
U800
4-Pole
45 MHz
Filters
Z401A/B
From PLA/DSP
To TX Buffer
Noise Blanker E0
band only
DATA_EN
TX/RX
Switch
D610/D611
VCO Buffer
Q604/Q605
Synthesiser
Buffer
Q607
TX/TX AF
Switch
U801C
Differential
Amp U402
IQ
Demodulator
U401
90 MHz
VCO
Q402
90 MHz
VCO
SWITCH
Q412
from
PLA
U300
from U701
to U701
Tx Audio
TX_MODE from
PLA
U300
AGC
AUX_CP
ACK_LO2
TX_PSU
SRM9000 SERIES SERVICE MANUAL
Figure 3-1 VHF/UHF Receiver Block Diagram
TNM-U-E-0002 Issue 1
SRM9000 SERIES SERVICE MANUAL
3.1.4
Receiver Audio Processing
The base band audio from the IQ Demodulator is applied to a differential amplifier that cancels out DC
offsets and converts the balanced demodulator I/Q output signals to unbalanced inputs for the CODEC
U800.
All receiver audio processing and filtering functions are performed by the CODEC under the control of the
DSP. The receiver I and Q analogue baseband signals are converted to digital signals by the CODEC ADC
before being applied to a series of digital filters which provide the final stage of adjacent channel filtering,
high pass and low pass filtering, mute noise processing and volume control for narrow and wideband
operation. The fully processed signal is then converted to an analogue audio signal by the CODEC DAC
and then applied to conventional audio amplifiers U803A/B and the speaker amplifier U805.
In addition, Discriminator Audio is derived from the other CODEC output channel and then amplified by
U802A after which it is applied to one of the radio I/O connectors for option purposes. Discriminator Audio is
a preset level set by the FPP and is independent of squelch operation.
There are two speaker options available. A half bridged configuration using a speaker across balanced
output SPKR OUT1 and 2, which provides an audio output level of up to 4 watts into 4 ohms. The other
option is a full bridge configuration using a high power speaker across SPKR OUT1 and 2 and providing an
audio output level of up to 10 watts into 8 ohms. The carrier and signalling mute functions are performed
by Q810/811/813 under DSP control. De-emphasis to the audio PA U805 is performed by R861 and
capacitors C866 to C871. Flat audio is provided to S1-6 via amplifier U803A.
© TMC Radio 2006
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TNM-U-E-0002 Issue 1
SRM9000 SERIES SERVICE MANUAL
3.2
TRANSMITTER
Refer to Figure 3-2.
3.2.1
Drivers and PA Stages
The RF output level from the VCO T/R switch D611a is typically +5dBm (UHF) and +8dBm (VHF). Tx
buffers Q606/Q612 increase this level to provide approximately 10dBm of drive power to the Tx driver
Q571. The Tx driver stage provides a maximum of 17dBm of drive to the PA module and provides part of
the power control function in conjunction with the first stage of the PA module. The buffer/driver circuits in
conjunction with their attenuator circuits also provide a high degree of VCO isolation from the Tx output.
The gains of PA driver Q571 and PA module are controlled by the power control loop to ensure that
transmitter output power remains within defined limits.
PA module U500 utilises three MOSFET stages (UHF) and two MOSFET stages (VHF) to achieve the
required maximum RF output power level of +44dBm (25 watts).
Note. Care should be taken during servicing since if for any reason the drive power is lost, while the power
control voltage is high, the current into the PA may exceed its specification. Therefore, the power supply
current should be monitored at all times and preset to as low as required. The radio has additional inbuilt
safeguards, but these should not be relied on.
Power output settings are derived from alignment data stored in flash memory during the initial factory
alignment. The DSP processes this data to optimise the power output level relative to the programmed
channel frequencies that may be changed at any time without retuning the radio.
PA current is monitored via comparator U520B, the output of which is passed via a temperature
compensation network R541 to R543 to ADC U301C. U301C samples the applied voltage after which it is
passed to the PLA and then processed by the DSP.
3.2.2
Power Control
Output power is stabilised by a power control feedback loop. A printed circuit transmission line, L580, R580,
D510 and associated components comprise the power detector. Comparator U520A and associated
components provide the power setting and control functions. Forward and reverse power is sampled by the
power detector and applied as a DC voltage to the inverting input of the comparator. The TX_PWR set
voltage is a DC voltage proportional to the programmed Tx power setting and is applied to the non-inverting
input of the comparator.
The TX_PWR voltage originates from the PLA as a PWM signal and is integrated for application to the
comparator.
PA module output level changes due to supply voltage, load or temperature variations are detected and
applied to the comparator that proportionally adjusts the PA module bias supply and the PA driver (Q571)
supply, and therefore the PA drive level. High temperature protection is provided by thermistor R552 that
progressively reduces the power level if the PA module temperature becomes excessive.
3.2.3
Antenna Changeover and Harmonic Filter
The antenna changeover circuit consisting of pin diodes D580/D540a/D541a, is switched by
Q541/Q542/Q543 and associated circuitry allowing the transmitter output to be coupled to the antenna while
providing isolation for the receiver input. With the transmitter switched on, the diodes are forward biased
allowing power to be coupled through to the antenna and isolating the receiver by grounding its input at
C588. The short circuit at the receiver input is transformed to an effective open circuit at D580 by L583,
which minimises transmitter loading. With the transmitter switched off the diodes are reverse biased
allowing the receiver input signal to reach the receiver front end with minimal loss. The harmonic rejection
low pass filter comprises L582/L584/L585 and associated capacitors.
3.2.4
Transmitter Audio Processing
The microphone audio input signal is applied to the microphone input (AUDIO_IN1) and is derived from an
external microphone unit with an applied nominal level of 40mV RMS. U801A is a control gate that switches
between AUDIO_IN1 and OPTION_AUDIO1 to provide external audio options and data input.
© TMC Radio 2006
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TNM-U-E-0002 Issue 1
SRM9000 SERIES SERVICE MANUAL
13V8_UNSW From L8
TX Current Sense to PLA
Standard Microphone
External Accessory Audio
TX_CURRENT
Directional
Coupler
TX PA U500
Switch
U801A
MOD_SW
TX_MODE
TX/RX AF Control
From PLA
ADC/DAC/
CODEC U800
DATA_EN
Audio
Gate
U801B
From PLA/DSP
TX VCO
Switch
Q603
TX_MOD
TX VCO
Q602
VCO
Buffer
Q604/
Q605
RX/TX AF
Switch
U801C
TX/RX
Switch
D610/
Q611
To RX Mixer
LO1_RX
TX Buffer
Amp
Q606/
Q612
Internal MIC/ External
Audio Control From PLA
TX Driver
Q571
Power
Control
Comparator
U520A
Current
Sense
U520B
Antenna
Filter
L582/
L584/L585
Antenna
Switch
D580/
D540/
D541
from PLA
PA_ON
Antenna
Switch
Control
Q541/
Q542
Power
Control
Detector
D510
Thermal
Shut Back
R552
TX_PWR
Integrator
R308/C307
PWM TX Power
Set from PLA
U801C provides CODEC input switching which selects either the receiver I signal or transmitter audio/data
signals depending on the Tx/Rx mode. All pre-emphasis, filtering, compression and limiting processes for
narrow and wideband operation are carried out in the DSP after A-D conversion by CODEC U800. The
processed transmitter audio/data from the CODEC output at VOUTR is applied to the VCO as a modulation
signal with a level of approximately 200mV P/P via AF Switch U801B.
Figure 3-2 VHF/UHF Transmitter Block Diagram
3.3
3.3.1
FREQUENCY SYNTHESISER
General
Refer to Figure 3-3.
© TMC Radio 2006
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TNM-U-E-0002 Issue 1
SRM9000 SERIES SERVICE MANUAL
The frequency synthesiser consists of one transmitter and two receiver voltage controlled oscillators, loop
filters, varactor negative bias generator, reference oscillator and an integrated dual phase locked loop
device U701.
3.3.2
PLL
The PLL device contains two prescalers, programmable dividers and phase comparators to provide a main
and auxiliary PLL. The main PLL of U701 controls the frequency of the Tx/Rx VCOs via Control Voltage
outputs at pins 2 and 3 and VCO feedback to pin 6. The auxiliary PLL is used to control the receiver 90MHz
second local oscillator via the Control Voltage output at pin 17 and VCO feedback to pin 15. The PLL
operation involves the division of the 14.4MHz reference oscillator frequency to 225kHz (VHF) or 450kHz
(UHF) by divider U710. It is then divided by the internal divider of U701 down to a low frequency that
corresponds to a sub-multiple of the radio channel spacing, ie. 6.25kHz for 12.5/25kHz channel spacing,
5kHz for 10/20kHz channel spacing or 7.5kHz if required. The VCO frequency is sampled and divided down
to the same frequency after which it is phase compared to the reference. Any error produces an offset to the
Control Voltage output that is used to correct the VCO frequency. A valid lock detect output is derived from
pin 20 and is sampled by the PLA. During transmit, if an unlocked signal is detected the radio will switch
back to receive mode. An unlocked signal in receive mode will cause the radio to beep.
3.3.3
VCO’s
The transmitter and receiver VCO’s use low noise JFET transistors Q600 (Rx), Q602 (Tx) and associated
parts to generate the signals for the required band coverage. Electronic tuning is provided by varactor
diodes D600 to D608 with their control voltages derived from the Loop Filter, PLL and Negative Bias
Generator. VCO selection and timing is controlled by the DSP/PLA via the Rx and Tx power supplies and
applied through switches Q601 (Rx) and Q603 (Tx). VCO buffer Q604/Q605 isolates the VCO from load
variations in following circuits and active power supply filter Q615 minimises supply related noise. A PLL
feedback signal is sampled from the VCO buffer output via buffer Q607.
The 90MHz receiver VCO comprises Q402 and associated parts. Automatic tuning is achieved by applying
a control voltage to D414/D415 via Loop Filter R445, R446, R701, C486, C701 and C702.
3.3.4
Negative Bias Generator and Loop Filter
A positive and negative varactor bias supply similar to the front-end varactor arrangement has been used to
achieve the required broadband tuning range of the VCO’s. PLL device U701 is programmed to deliver a
nominal +2.5V output from phase detector/charge pump CPPF or CPP regardless of the channel frequency
selected. This voltage is filtered to remove synthesiser noise and reference products by the Loop Filter
comprising C671 to C681 and R653/R654/R655. The resulting low noise voltage is applied to the cathode
side of the VCO varactor tuning diodes as a positive bias voltage. The negative bias supply originates as a
positive DC voltage (0.1V to 3.0V) at the DAC output of U701 (DOUT) with a level relative to the
programmed state of the radio (eg. channel frequency and Tx/Rx state). The voltage is translated to a
negative voltage between 0V and –16V by the circuit comprising Q700 to Q703. The -16V rail of this supply
is generated by U904E/F with D903 to D906 providing the voltage multiplying effect needed to achieve 16V. The output of the negative supply is applied directly to the VCO varactor anodes as the negative
tuning voltage VCAP BIAS.
3.3.5
Phase Modulator
The modulation path for audio, data and higher frequency CTCSS signals is via varactor D609 and its
associated components in the Tx VCO. The reference input to the PLL (REF) provides the low frequency
modulation path via the Phase Modulator.
The phase modulator comprises the following sections:
- Integrator U711A is a low pass filter providing 6dB per octave attenuation to frequencies above
approximately 10Hz.
- Divider U710 divides the 14.4MHz reference frequency down to 225kHz (VHF) or 450kHz (UHF).
- Ramp generator Q711/Q712 provides a saw tooth output, the slope of which is adjustable
via the MOD_BAL line. This adjustment is set via a DAC output controlled from the Alignment
Tool. Adjustment of the ramp slope effectively changes the Phase Modulator gain by
modification of the Schmitt Trigger switching points after modulation from the Integrator is
combined to the saw tooth ramp.
© TMC Radio 2006
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TNM-U-E-0002 Issue 1
SRM9000 SERIES SERVICE MANUAL
The divided reference signal is differentiated and discharges C744 via Q711 after which Q711 is turned
off allowing C744 to recharge via constant current source Q712/Q713.
Schmitt Trigger comprising Q714 to Q716 converts the modulation combined with the saw tooth ramp
to a square wave output, the duty cycle of which is controlled by the ramp slope and modulation.
Modulation balance adjustment is carried out using a CODEC generated 100Hz square wave applied to
the TX_MOD input and set to give an optimum demodulated square wave output.
3.3.6
Reference Oscillator
TCXO U700 determines the overall frequency stability and frequency setting of the radio. The frequency
setting is achieved by adjusting its ADJ voltage with the Alignment Tool. In addition, the ADJ input is used in a
frequency control loop with the receiver I and Q signals to provide receiver AFC. U700 operates at 14.4MHz
and is specified at ±2.0ppm frequency stability over the temperature range -30° to +75°C.
Data From
DSP
RX_PSU
TX_PSU
RX_PSU
To IQ
Demodulator
U400
LO2
AUX_LO2
90MHz
VCO Q402
CPP
AUX_CP
Phase
Modulator
Q714Q716
Integrator
U711A
REF
VCO
Buffer
Q604/
Q605
CPPF
Synthesiser
U701
TX_MOD
PLL Loop
Filter
DOUT
VCO Neg
Bias
Supply
Q700Q703
RX/TX VCO
Q600/ Q602
Buffer
U711B
Ramp
Generator
Q711Q713
To TX Buffer
VCAP_BIAS
LO1_RX
SYNTH
TX_MOD
Synth
Buffer
Q607
Divide 32 (UHF)
Divide 64 (VHF)
MOD_BAL
TX/RX
Switch
D601/
D611
Prog.
Divider
U710
14.4MHz
Reference
Oscillator
U700
Buffer
Q710
AFC from
PLA
Figure 3-3 VHF/UHF Synthesiser, Block Diagram
3.4
CONTROL
Refer to Figure 3-4.
DSP and PLA
3.4.1
The SRM9000 transceiver operates under the control of a DSP (U201) and PLA (U300) combination that
together with a number of other dedicated devices perform all the operational and processing functions
required by the radio. The PLA is configured by the DSP under software control to provide the following
functions:
•
Channel set-up of all operating frequencies
•
Modulation processing and filtering
•
De-modulation processing and filtering
•
Tx power output reference
© TMC Radio 2006
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TNM-U-E-0002 Issue 1
To RX Mixer
SRM9000 SERIES SERVICE MANUAL
3.4.2
•
Modulation Balance adjustment
•
Receiver front-end tuning
•
Serial communications with alignment tool, microphone and control head
•
Modem functionality for data modulation
•
All signalling / CTCSS generation and decoding
•
DSP Crystal Oscillator control
•
Receiver muting control
•
RSSI / AGC control
•
AFC
•
Tx / Rx switching and PTT control
•
PLL lock detect
•
Audio switching
•
Power On/Off control
•
Interface functionality with Option Boards and External Devices
•
Battery voltage and Tx current monitor
DSP Clock Oscillator
The DSP is clocked by a 15.360MHz oscillator that consists of crystal X200 and an internal DSP oscillator.
Q200 forms a crystal switching circuit with C205 which, when activated by a command from the PLA, steers
the oscillator away from potential interfering frequencies.
3.4.3
PLA PWM
The PLA must supply several analogue signals to control radio tuning. It does this with several Pulse Width
Modulated (PWM) outputs.
The front-end tune signals (TUNE1-TUNE4) originate from the PLA in the form of PWM signals. The
values for these signals are stored in flash memory from radio alignment and selected depending on the
channel that the radio is currently tuned to. These signals are integrated by RC networks to provide the
analogue tuning voltages that are then applied to the tuning varicap diodes.
Other analogue PWM derived signals used are transmitter power (TX_PWR), receiver AGC voltage (AGC),
LED’s (RED/GREEN) and modulation balance (MOD_BAL).
Analogue inputs are monitored by four comparators comprising U301A-D and a ramp generator, the ramp
being derived from a PWM signal from the PLA.
Analogue voltages to be monitored such as PLL Loop Voltage (LOOP_VOLTS), key detect (KEY_DET),
battery voltage (BAT SENSE), transmitter current (TX_CURRENT), volume level (VOLUME) and external
sense (EXT_SENSE) are connected to the inverting inputs. The analogue voltages are compared with the
ramp voltage as they increase and the comparator switches at the point where the input voltage exceeds
the ramp. The PLA compares the time that this occurs with the PWM signal and converts it to a binary
value.
3.5
MEMORY
Memory consists of the internal DSP memory and an external 8MB non-volatile Flash Memory U202. When
power is off, all program SW and data are retained in Flash Memory. At power-on, a boot program
downloads the DSP and PLA SW from Flash Memory to their internal RAM’s for faster program execution
and access to data. PLA SW is loaded by the factory into the Flash Memory and can be updated via the
© TMC Radio 2006
page 29
TNM-U-E-0002 Issue 1
BAT_SENSE
© TMC Radio 2006
Reset
U200
Clock
X200
Rx
Audio
CODEC
U800
DSP
U201
Tx
Audio
XTAL_SHIFT
Synthesiser
U701
Flash
Memory
U202
LOCK
PLA
U300
FUNCTION_EN
AFC
TX_Power
MOD BAL
AGC
Tune 1 - 4
page 30
TX_DATA
RX_DATA
Bit
Inputs
Bit
Outputs
Serial port
Serial port
1. PTT_IN1
2. PTT_IN2
3. GAIN
4. DC PWR_STATUS
5. PWR_ON
1. SPKR_ON
2. PA_ON
3. TX_MODE
4. OPTION ON/OFF
5. PWR_OFF
6. ANALOG GATE CONTROLS
7. SYNTH_FAST
POWER_SENSE
BAT_SENSE
TX_CURRENT
EXT_SENSE
LOOP_VOLTS
Sampled Analog Inputs
PWM
Outputs
SRM9000 SERIES SERVICE MANUAL
Alignment Tool. DSP SW comprises Start-up code that is also loaded by the factory. High-level SW
comprising Operational Code and Customer Configuration are loaded at distribution centres and are loaded
via the FPP Programmer.
UPDATE Figure 3-4 Controller Block Diagram
TNM-U-E-0002 Issue 1
SRM9000 SERIES SERVICE MANUAL
3.6
POWER SUPPLIES
Power On Function
3.6.1
The unregulated 13.8V DC input (13V8_UNSW_F) is routed directly to all high current devices and is then
switched via FET Q900 to provide BAT_SW supply for all other circuits. The output from Q900 feeds three
low dropout series regulators and switched battery voltage These regulated supplies power auxiliary
supplies as well as the negative voltage generator. The radio ON/OFF function is achieved through Q902,
Q908 and Q909. A low voltage pulse from the control unit or microphone handset PWR ON or PWR OFF
momentarily turns on Q900/Q908 for approximately 1 sec. In this time, the radio DSP samples the
PWR_SENSE line and determines the state of the on-off switch. If the on-off switch is on, the DSP raises
the PWR_OFF line and latches the main FET on, which then maintains power to the radio circuitry.
The Power-off operation requires the On-Off switch to be turned off for more than 2 seconds. If the On-Off
switch is sensed going low by the DSP via the PWR_SENSE line, the DSP will save radio settings and then
lower the PWR_OFF line, thereby turning Q900 off.
Power Supplies
3.6.2
The following is a list of the SRM9000 power supplies and some of the devices and circuits they supply.
3.6.2.1 8V Regulator U900
Regulated 8.0V supply (8V0 and +8V)
•
Tx buffers Q571, Q612
•
VCO’s and VCO buffers via active filter Q615
•
Rx second local oscillator via Q403
Regulated 8.0V switched supply (Rx PSU)
•
Rx front end
•
IF Amplifier
•
Various switching functions
3.6.2.2 5V Regulator U901
Regulated 5.0V supply (5V0 and +5V)
•
Rx front end varactor positive bias
•
Synthesizer buffer Q607
•
VCO varactor negative supply Q700 to Q703
•
TCXO U700
•
TCXO divider U710
•
Rx audio amplifiers U802/U803
•
Rx mute switch Q810 to Q813
•
FE TUNE level translators, Q404 to Q411
•
Analogue supply for U701
Regulated 5.0V switched supply (Tx PSU and Tx PSU+)
•
Tx power control U520
•
Tx buffer Q606
•
Various switching functions
© TMC Radio 2006
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TNM-U-E-0002 Issue 1
SRM9000 SERIES SERVICE MANUAL
3.6.2.3 3.3V Regulator U912
Regulated 3.3V supply (3V3)
•
Reset U200
•
PLA U300
•
DSP U201
•
Flash U202
•
Digital supply for CODEC U800
Regulated 3.3V supply (3C3)
•
Analogue supply for CODEC U800
Regulated 3.3V supply (3Q3)
•
I/Q demodulator U401
Regulated 3.3V supply (3P3)
•
Digital supply for PLL U701
Unregulated 13.8V (13V8_UNSW_F)
•
Tx PA module U500
•
Antenna changeover switch Q541/542/543
•
Rx mute switch Q811
•
Rx audio power amplifier U805
3.6.2.4 2.5V Regulator U903
Regulated 2.5V supply (2V5)
•
DSP core U201
•
PLA core U300
3.6.2.5 Negative Power Supply U904E/F
•
-16V output (-16V) for VCO Varicap tuning drivers
•
-12V Output (-12V) for Front end Varicap tuning drivers
3.6.2.6 Unswitched Battery (13V8_UNSW_F)
•
Transmit Power Amplifier
•
Speaker Amplifier
© TMC Radio 2006
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TNM-U-E-0002 Issue 1
SRM9000 SERIES SERVICE MANUAL
4.
ALIGNMENT (LEVEL 3 SERVICE ONLY)
This procedure is applicable to all versions of SRM9000 mobile transceivers.
Caution
Preparing the radio for alignment will erase from the radio all customer PMR and Trunking
configuration data (channel, signalling information etc). The only data retained by the
Alignment Tool is the factory alignment data for the radio (DAC settings for Tx power, front-end
tuning, etc).
Using the Alignment Tool will allow changes to the original factory alignment and will invalidate
all warranties and guarantees unless performed by an authorised level 3 service centre.
If the radio contains customer configuration data that must be retained, you must first use the SRM/SRP
Personality Programmer (FPP) software to read all radio configuration files and save them on to alternative
media before commencing the alignment procedure.
When the Alignment is completed, use the FPP software to retrieve this stored data and write it back to the
radio.
It is preferred that the radio remain installed in its aluminium extruded case throughout this alignment
procedure. If the radio is to be aligned when removed from the case, a temporary heat sink must be fitted
under the Transmitter PA module and the receiver output must be kept below 100mW.
Note. Final Tx power adjustments must be performed with the radio board installed in the chassis.
4.1
1.
TEST EQUIPMENT
Radio transceiver test set
CMT, 52/82 or similar.
Note. For alternative equipment, the Mod
Balance test requires internal DC coupling
between the demodulated signal and
demodulation output connector.
2.
Variable DC power supply
10.8V to 16.3V current limited to 7 amps
3.
Oscilloscope
20 MHz bandwidth minimum
4.
SRM9000 Programming & Alignment Breakout
Box
As detailed in Figure 4-1
5.
SRM9000 Speaker O/P Breakout Box
As detailed in Figure 4-2
6.
Personal Computer
486 DX 66 or better.
Operating system Windows 95 or later.
Minimum RAM - 16MB.
5MB free hard disk space.
Floppy drive - 1.44MB.
Mouse and serial port required
7.
SRM/SRP Alignment Tool
Computer Software file
8.
SRM/SRP Field Personality Programmer
(FPP)
Computer Software file
© TMC Radio 2006
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TNM-U-E-0002 Issue 1
SRM9000 SERIES SERVICE MANUAL
AF Generator
BNC (F)
Connector
PC
25-9 Way
Adaptor
White (8)
(Not Used)
To
SRM9000
S1
22uF to 47uF
Tant. or Elect
470E
Green(4)
DB25
PRM80
Programming Cable
P/N 9525-001-00016
RJ45
White
Orange
Black
Red
Green
Yellow
Blue
Brown
Mic Audio in
Ground
Handset AF Output
13.8V Switched
Mic Ground
On/Off
Rx Data
Tx Data
Access and modify
cable as shown
9000_49/2
Figure 4-1 SRM9000 Programming & Alignment Breakout Box
To
SRM9000 P2
Pins 6 & 13
T1
600R 1:1
Line Matching
Transformer
R = Audio power Load (set as appropriate)
or
Resistor 4R 4W for ½ Bridge Speaker option
Resistor 8R 12W for full Bridge Speaker option
To
Noise & Distortion Meter
Oscilloscope
9000_49/3b
Figure 4-2 SRM9000 Speaker Output Breakout Box
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4.2
TEST SET-UP
Noise &
Distortion
Meter
SRM9000
CRO
PC
15
SRM9000
Speaker O/P
Breakout
Box
14
13
P2
(DB15M)
12
11
10
S1
RJ45
13.8V DC
Power Supply
SRM9000
Programming
and
Alignment
Breakout
Box
S5
Antenna Skt
Coax
(<200 mm)
AF
Generator
Radio
Transceiver
Test
Set
9000_49
Figure 4-3 Test Set-up
1.
Connect the radio to the test equipment as shown in
2.
3.
4.
Figure 4-3.
5.
Switch on the DC Power Supply.
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4.2.1
1.
COMMS Set up
Copy the SRM9000 Alignment Tool Computer Software
file to the PC hard drive and run the program
The Alignment Tool Opening Menu is displayed.
2.
Go to the Options menu and choose Comms Setup.
3.
The Comms Setup dialogue box is displayed.
Select the Comms Port setting appropriate to the
configuration of your PC and choose üOK.
(Usually COM1)
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4.2.2
Radio Preparation
Radio parameters are to be aligned sequentially as detailed in this procedure.
1.
At the Opening Menu, select the Align Menu
and choose Prepare/Read Radio.
2.
The WARNING is displayed.
Choose No if you want to save the
configuration and use the FPP software to
read and save the data to a file.
Choose Yes if you want to proceed and go to
step 3.
3.
The radio alignment data is read (indicated
by percentage bar) and stored.
The test alignment data is downloaded into
the radio.
Note:
In test alignment mode the radio is configured only for 12.5 kHz channel spacing, therefore all
alignment is carried out at 12.5 kHz settings unless otherwise specified. When the radio is
configured with the FPP for other channel spacings, the deviation related levels are calculated on
a per channel basis by the radio software.
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4.2.3
Alignment Procedure
Radio alignment must be done in the sequence detailed in the following paragraphs. This alignment
assumes that the radio is functioning normally.
4.2.3.1 VCO DAC Alignment
1.
Select the VCO DAC page.
2.
Select Auto Align. The Synth DAC Rx slider will automatically adjust its value for each receiver
alignment frequency to set the VCO loop filter value between 140 and 150.
3.
Select PTT and then select Auto Align. The Synth DAC Tx slider will automatically adjust its value for
each transmitter alignment frequency to set the VCO loop filter value between 140 and 150.
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4.2.3.2 TCXO (Radio Netting Adjustment)
1.
Select the Mute/TCXO page.
2.
Select PTT.
3.
Adjust the TCXO slider to ensure that the transmit frequency error is within 50Hz for the selected
channel (to be measured on the RF Test Set frequency counter).
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4.2.3.3 Rx Front End
1.
Ensure that the TCX0 Alignment has been done before proceeding with this section.
2.
Select the Rx Front End Page.
3.
Select Open Mute.
4.
Set the Volume slider to 15.
Speaker audio should now be visible on the Scope. If required readjust the Volume slider to a suitable
level.
5.
Set the Signal Generator to the Channel 0 carrier frequency, with a 1000Hz modulation signal, a
deviation of ±2 kHz and an RF level of -90dBm.
6.
Select Channel 0.
7.
Select Auto Align.
The front end will be tuned automatically and finish with an RSSI reading of typically around 150.
8.
Repeat Steps 7 to 8 for the remaining 3 Channels (1, 2, & 3).
9.
Change deviation to 1.5kHz.
10.
Verify that the receiver sensitivity is better than -117.5dBm for 12dB sinad on all channels.
(Sensitivity is typically -120dBm).
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4.2.3.4 Mute Adjustment
Note. This adjustment has default setting of 1000/2600 and should not need changing except for specific
requirements.
1.
Select the Mute/TCXO page and select Open Mute.
2.
Set the RF signal generator to the receiver alignment frequency, and adjust the RF level such that
the desired mute opening SINAD (typically 10dB SINAD) is achieved.
3.
Select Close Mute and remove the RF input from the radio.
4.
Set the Squelch Open and Squelch Close sliders to the fully left position. This ensures the receiver
will be muted.
5.
Set the Squelch Close slider to the fully right position.
6.
Reconnect the RF input to the radio.
7.
Adjust the Squelch Open slider to the right until the mute opens.
8.
Reduce the Signal Generator output level by approximately 2dB (or by an amount equal to the
desired mute hysteresis level).
9.
Adjust the Squelch Close slider to the left until the mute closes.
10.
The mute should now open and close at the desired RF levels.
Note. On revision 9 radios and higher, an additional Tx Audio Balance DAC is also provided.
For these radios, the Tx Audio Balance DAC is defaulted to zero for normal setting. However, for a
more accurate setting, the DC voltage at TP745 needs to be noted during Rx and adjusted by the Tx
Audio Balance DAC to give the same reading (to within 10mV).
15.
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4.2.3.5 RSSI
1.
Select the RSSI Cal page.
2.
Set the Signal Generator for a RF output level of -90dBm and 2kHz deviation at the specified
frequency.
3.
Activate the Store RSSI button.
The receiver RSSI threshold setting is calibrated.
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4.2.3.6 Tx Power
1.
Select Tx Power/Mod page.
2.
Select Channel 0.
3.
Select the 1W power level.
4.
Press the PTT button.
5.
Adjust the Tx Final Value slider for a power output of 1W.
6.
Repeat step 5 for the remaining 3 Channels (1, 2, & 3).
7.
Select the 5W power level.
8.
Adjust the Tx Final Value slider for a power output of 5W.
9.
Repeat step 8 for the remaining 3 Channels (2, 1& 0).
10.
Select the 25W power level.
11.
Adjust the Tx Final Value slider for a power output of 25W.
Note that the supply current is less than 6.5A.
12.
Repeat step 11 for the remaining 3 Channels (1, 2, & 3).
13
Rev 9C+ only, press “Calibrate TX PA Current” button to automatically set the maximum current
limit.
Note: This feature is not available on earlier radios and therefore will not be displayed.
14
Release the PTT button.
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4.2.3.7 Modulation
1.
Select Tx Power/Mod page.
2.
Select Channel 0.
3.
Select the 1W power level.
4.
Set the microphone input signal from the Audio Generator to 1000Hz at 400 mV RMS.
5.
Adjust the VCO Modulation Limit slider for a maximum peak deviation of ±2.3kHz
6.
Reduce the microphone input level to 40mV RMS and check that the deviation is within the range
±1.25 kHz to ±1.75 kHz.
7.
Repeat steps 2 to 7 inclusive for the remaining 3 Channels (1, 2, & 3).
8.
Remove the microphone audio input signal.
9.
Select the Generate Square Wave function.
10.
Select PTT and, while viewing the de-modulated signal on the transceiver test set oscilloscope,
adjust the Modulation Balance slider for the best square wave symmetry.
Note. DC coupling is required on the scope for optimum setting accuracy.
11.
Repeat steps 8 to 11 inclusive for the remaining 3 Channels (1, 2, & 3).
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4.2.3.8 Programming
When all channels have been aligned the radio is programmed with the new alignment data:
1.
Select Align and choose Write Alignment.
2.
A warning message is displayed.
3.
Choose Yes.
New alignment data is written to the radio.
4.2.3.9 Customers Radio Personality Data
If the Customers Radio Personality Data was saved as a separate file, use the FPP Programmer to write
this data to the radio.
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5.
REPLACEABLE PARTS
11
11
11
9000_51b
10
Figure 5-1 Replaceable Parts
5.1
Ident
COMMON PARTS
Description
Quantity per
Assembly
Part Number
Case
3513 901 70071
End Cap, Rear
6102 310 00212
Screw End Cap
12
3513 993 85009
Screw Tray Retention M3 x 16
3513 993 57117
Screw Tray Retention M3 x 12
3513 993 57116
Label Transceiver Top
6102 303 00101-0
End Cap, Front
3513 903 91072
Label Front End Cap
6102 303 00041-0
10
Inner Tray
3513 901 70083
11
Washer Fibre
17
3513 907 30241
Washer Seal BNC
3513 907 3255A
Gasket D Connector
3513 902 1082A
Gasket BNC
3513 902 10651
DC power installation kit
MA-DCPOWER
Tx PA Shield cover
3502 310 63223
RJ45 Connector S1
6102 621 00121-0
DB15 Connector P2
3513 993 02063
Antenna BNC connector S500
3513 505 05991
Audio PA Module U805
3513 999 52036
Voltage Regulator U900, U901, U912
6102 822 00121-0
Voltage Regulator U903
6102 822 00011
Temperature Controlled Crystal Oscillator U700
6102 982 00011-0
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Ident
Description
5.2
Part Number
Transient Suppressor Diode D900
6102 012 00031-0
Transmit Receive Switch Q541
3513 999 00006
ON/OFF FET Q7, Q900
6102 062 00051-0
BAND-SPECIFIC PARTS
Ident
6.
Quantity per
Assembly
Description
Quantity per
Assembly
Part Number
Tx PA Module U500 (E0 Band)
6102 861 00112-0
Tx PA Module U500 (AC Band)
6102 861 00012-1
Tx PA Module U500 (TU Band)
6102 861 00052-0
Tx PA Module U500 (R1 & R2 Band)
6102 861 00022-0
Tx PA Module U500 (UW Band)
6102 861 00042-0
Tx PA Module U500 (K1 Band)
6102 861 00122-0
Tx PA Module U500 (KM Band)
6102 861 00132-0
CIRCUIT DIAGRAMS
Issue 9 Circuit Diagrams are contained in this Section. Previous releases of circuit diagrams are contained
in separate Service Manual Supplements. See the table below for details:
Supplement Number
Description
TNM-S-E-0001
Issue 9 Circuit Diagrams
6.1
ISSUE 9 CIRCUIT DIAGRAMS
Figure
Description
Figure
Description
6.1
Top Overlay of PCB
6.20
E0 Band Synthesizer
6.2
Bottom Overlay of PCB
6.21
AC Band Receiver
6.3
DSP/Flash
6.22
AC Band Transmitter
6.4
PLA
6.23
AC Band VCO’s
6.5
Tx/Rx Audio
6.24
AC Band Synthesizer
6.6
Power Supply
6.25
K1 Band Receiver
6.7
I/O Connections
6.26
K1 Band Transmitter
6.8
E0 Band Receiver
6.27
K1 Band VCO’s
6.9
E0 Band Transmitter
6.28
K1 Band Synthesizer
6.10
E0 Band VCO’s
6.29
KM Band Receiver
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6.11
KM Band Transmitter
6.30
R2 Band VCO’s
6.12
KM Band VCO’s
6.31
R2 Band Synthesizer
6.13
KM Band Synthesizer
6.32
TU Band Receiver
6.14
R1 Band Receiver
6.33
TU Band Transmitter
6.15
R1 Band Transmitter
6.34
TU Band VCO’s
6.16
R1 Band VCO’s
6.35
TU Band Synthesizer
6.17
R1 Band Synthesizer
6.36
UW Band Receiver
6.18
R2 Band Receiver
6.37
UW Band Transmitter
6.19
R2 Band Transmitter
6.38
UW Band VCO’s
6.39
UW Band Synthesizer
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APPENDIX A - GLOSSARY OF TERMS
A summary of common radio terms and some other terms used in this document, and their meanings, are
given below.
3RP
Trunking Signalling Specification relating to trunked networks for shared use.
Used primarily for networks in France.
ADC
Analogue to Digital Converter.
AFC
Automatic Frequency Control.
AGC
Automatic Gain Control.
Alarm
A Selcall sequence sent from subscriber equipment to indicate an Emergency
situation.
When activated the radio will enter a repeating sequence consisting of an Alarm
Live Transmit Time and an Alarm Dead Receive Time.
Certain special conditions for the radio may also occur during the alarm.
A dedicated SFM (trunked system) that is sent by pressing the Alarm Key.
ANN
Abbreviation for Algorithmic Network Numbering. This is the numbering system
where the numbers presented to the radio user can be mapped directly to the
MPT1327 PFIX/IDENTs and vice versa by use of a fixed algorithm in combination
with some other customisation parameters. See also FPP and MEP.
ANI
Automatic Number Identification.
Auto Interrogate
An Acknowledge identity sent as a response to an individual reset call.
Automatic Power
Feature whereby the transmit power is automatically set to a level determined by
the level of the received signal. This is used to extend the battery life and/or
reduce radiated emissions.
Automatic Volume
Feature whereby the background audio level is monitored and if this is found to be
noisy then the volume level is increased to compensate, allowing the user to hear
better.
Background Hunting
The searching for an alternative and 'better' control channel whilst already on a
valid control channel.
BCAST
MPT1327 broadcast message. Used to transmit information about the trunked
radio system to radio units.
Busy
The state of a channel such that:
•
For a non-signalling channel - if Busy this means that the carrier is above squelch.
•
For a channel with CTCSS/DCS - if Busy this means a signal is being received
with either no CTCSS tone / DCS code or the correct CTCSS tone /DCS code.
•
For a channel with Selcall - if Busy this means a closed channel where the signal
is above squelch.
A feature that equates to 'Do Not Disturb' such that the radio will reject all nonemergency calls. This feature can be activated using the Busy key (if assigned) or
from a menu; it is reset to disabled at switch on.
C4FM
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Call Back
A request, sent by the dispatcher, to a unit requesting that the unit calls the
dispatcher back.
CCSC
Control Channel System Codeword.
Channel Spacing
The distance (in Hz) between the defined frequency channels.
CHEKKER
System Interface Specification for Trunked Networks in Germany.
CLIM
Call Limit Time; time limit on calls made. Normally this is defined by the Call Time
Limit parameter but can by overridden by the TSC depending upon the setting of
TSCLIM.
CLIME
Emergency Call Limit Timer.
Clipboard
A temporary storage area in Windows used to store data in cut, copy and paste
operations.
Closed
A state where transmit and receive are not allowed until a Selcall message to
open the channel has been received. A Closed Channel is one which defaults
(when selected or after timed reset) to its closed state. Contrast with Open.
Normally a Closed channel would have Selcall Mute and PTT Inhibit would be
enabled.
CODEC
COde (Analogue to Digital Converter) / DECode (Digital to Analogue Converter).
Community Repeater
A communications set-up whereby different groups of radios can operate by using
only one base station. This is achieved by the use of CTCSS tone signalling such
that each group has a different CTCSS tone (encode and decode) and radios can
only communicate with other radios in their group. Only one group of radios can
use the base station at any one time.
Continuous
A continuous control channel is one that is only used by one site. There are no
breaks in the transmission of signalling. Emergency Call Time Limit
Control Channel
A channel used for the transmission of messages that enables the TSC to control
radios. Control channels may either Continuous or Timed Shared.
Control Channel Burst A feature that enables control channel burst transmissions on systems using timeshared control channels. It is unavailable if the control channel acquisition type is
not 'Time Shared'. To make available: go to Control Channel Acquisition Type and
set to Time-shared.
CRU
Central Repair Unit
CTCSS
CTCSS stands for Continuous Tone Controlled Signalling System. A continuous
tone (lower than the audio range of the receiver) is modulated onto the carrier as
well as other signalling or voice traffic. Compare with DCS. Only receivers that
have been instructed to recognise the same CTCSS tone are able to receive the
transmissions, since the squelch of receivers looking for different CTCSS tones
prevents the audio from being heard. This provides a simple method of sending
messages to selected receivers only and allows several different networks to use
the same frequencies. CTCSS is also known as Tone Lock or Tone Squelch.
DAC
Digital to Analogue Converter.
Dash (-) digits
Digits known as 'No Tone' digits used in Selcall Identities.
DCS
Digital Coded Squelch system is based on sending a continuous stream of binary
code words using, low deviation, direct frequency shift keying. Only receivers
which have been instructed to recognise the same DCS sequence are able to
open their squelch and receive the associated speech transmissions. This
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provides a simple method of sending messages to selected receivers only and
allows several different networks to use the same frequencies.
Decode
Reception of signalling. Either Selcall where encoded tone frequencies are
decoded and identified as specific tones digits or CTCSS/DCS where tones are
analysed to see if the channel should be opened.
Demanded
Demanded Registration; a procedure in which the TSC forces a single radio unit to
attempt registration immediately (providing the radio is not already attempting to
register).
Disabled
The 'False' state of a parameter. That indicates this parameter is not active.
Typically this state is represented by an unmarked check box. Compare with
Enabled.
DSP
Digital Signal Processor.
DTMF
Abbreviation of Dual Tone Multi-Frequency signalling. Used to dial into Telephone
networks using tone dialling.
Dual Watch
A facility that enables the Radio to periodically monitor another channel for a
signal above squelch. Typically applications are checking an emergency channel
whilst on another channel.
Dynamic User Groups These groups use a temporary user Ident to group a number of units together who
would not normally make up a group. These groups are formed by the TSC
(contrast with User Defined Groups) sending a special message to units instructing
them to add a new group Ident to their list of groups. Up to 8 groups can be
defined. These temporary groups are lost at switch off unless 'Save Groups at
Switch Off' is enabled.
Economiser
A process by which the Receiver is powered down whilst there is no received
signal. Periodically the receiver is powered up to check for such a signal. This is
used to extend the battery life.
Enabled
The 'True' state of a parameter. That indicates this parameter is active. Typically
this state is represented by a mark (either a tick or a cross) in a check box.
Compare with Disabled.
Encode
Transmission of signalling. Either Selcall where Selcall tone digits are encoded
into tone frequencies or CTCSS/DCS where tones modulated onto the channel's
carrier.
ETS
European Technical Standard.
External Alert
A facility for switching on various ancillary devices to meet customer's individual
requirements (e.g. car horn, flashing lamp etc.) when 'called'.
Only available on a mobile radio. To make available: go to Hardware
Components, Terminal Settings and set Product Type to a Mobile type.
Fallback
A mode of operation that may be entered when the Network is suffering a
malfunction. During this mode certain facilities (e.g. PSTN) may not be available.
FFSK
Fast Frequency Shift Keying. This is a signalling system for the transfer of digital
information. It works by using one of two audio tones to represent transmit data..
Fleet
A group of units formed such that only a shortened form of dialling (2 or 3 digits) is
required between them. These groups are normally assigned contiguous ident's.
FOACSU
Full Off Air Call Set Up. A method of call set-up where the calling party has to
manually answer the incoming call before the trunking system will allocate a traffic
channel to the call. This reduces the loading on traffic channels as it prevents
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them being allocated to calls when the called party is not present to deal with the
call.
PLA
Programmable Logic Array.
FPP
Field Personality Programmer.
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Hash (#) digits
These digits are used for two purposes:
• For Selcall identities (encode and decode) - known as User Id digits. These digits
are replaced by the user id entered at switch on (if enabled)
• Use in DTMF dialled strings - their use is network dependent to access special
services.
IDENT
A 13 bit number used for Identification purposes. Associated with a Prefix (PFIX)
this forms a 20 bit address which is used for identification purposes in signalling
between the radio and the trunking system.
Identity
Name given to a sequence of tones which is used in sequential tone signalling.
See Valid Selcall Digits.
Idle State
The state of the radio when it is not in a call.
Inaccessible
A state of a channel such that it is unavailable to the user through normal methods
of channel selection. Therefore inaccessible channels will not appear on the
channel menu.
Include Calls
these types of calls are used to allow a 3rd party to join into an existing call.
Link Establishment
Time
A delay incorporated into the start of every selective call or DTMF transmission
which allows for the finite delay of the radio equipment in responding to any radio
signal. This includes both the commencement time of the originating transmitter
and the response time of the receiver.
Locked
A state of a channel whereby it is not possible to change channels using the
normal up/down keys on the channel menu until the OK key is pressed. See Auto
Channel Selection Lock.
MEP
Miniaturisation Extent Parameter. Used in systems that use ANN numbering.
Modifier
Part of a dialled string that modifies the nature of the call made to a number (e.g.
dialling "*9" before the number that is to be dialled will modify the call to be an
emergency call).
MPT1327
A signalling standard for Trunked Private Land Mobile Radio Systems. Defined for
systems in the UK but also used outside the UK. Issued January 1988.
MPT1343
A System Interface Specification for commercial Trunking networks. Defined for
systems in the UK but also used outside the UK. Issued January 1988.
Noise Blanker
A circuit designed to reduce automotive ignition interference.
NDD
Network Dependent Data. This is a field within the CCSC codeword that is used by
the trunking system to identify information about the trunking network and, in
particular, information specific to the site that is radiating the control channel. It is
used by the radio when it is acquiring a control channel to identify valid channels.
Null Id
A Selcall identity that is not defined and whose tones' field is displayed as a blank.
Open
A state where transmit and receive are allowed. The channel is no longer open
when reset. Contrast with Closed.
Normally an Open channel would not have Selcall Mute and PTT Inhibit would be
disabled.
OPID
Network Operator Identity used in Regional Systems. See Roaming.
PABX
Private Automatic Branch Exchange.
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Password
An optional password system available on the radio. This feature is only available
if the radio does has a display and a keypad. To make available: go to Hardware
Components, Terminal Settings and set Product Type to one which has a display
and a keypad.
PFIX
The 7 most significant bits of an MPT1327 address number. Normally same fleet
units have same prefix. Relates to individual and group address numbers.
PLL
Phased Locked Loop.
PMR
Private Mobile Radio (not normally trunked).
Priority Channel
A channel in a search group that is scanned between every other channel.
PSD
Peak System Deviation.
PSTN
Public Switched Telephone Network.
PTT
Press To Talk. This is the term given to the operator’s key normally used to
commence transmitting a message.
PTT Inhibit
A state whereby transmission using the PTT is not allowed. Also know as Tx
Lockout.
PWM
Pulse Width Modulation.
Queuing
The storing of an Selcall Identity for later transmission.
If inhibited from transmitting a selcall sequence because the channel is busy then
the radio can queue the Send 1 / Send 2 sequence for later transmission. When a
radio unit is in Queuing mode all incoming calls are stored automatically in a
queue for later examination. The caller is given an indication that the call has
been queued by the called party. The queue will contain the identity of the caller
and the status value received (if a status call). Up to 20 calls may be queued. The
Queuing mode may be selected using the Modes Menu.
Note: Connecting a MAP27 device to a radio that is in queuing mode will disable
queuing. All incoming calls will then be routed both to the radio user interface and
to the MAP27 device connected to the radio. Also known as Logging Mode
Reference Frequency
Normally this is generated from a high stability crystal oscillator reference and is
divided digitally in a frequency synthesiser for comparison with other frequency
sources, e.g. a VCO.
Registration
Registration is a technique used to ensure that the trunking system knows the
location of radio units that are using the system. This allows the system to setup
calls quickly without having to search the whole system for the called radio.
Repeat Tone
A selcall tone that is used to replace repeated tones. Fixed at tone E.
Example: An identity entered as '12333' would be sent by the radio as '123E3'.
Reset
Resetting is caused by Three Tone Reset, a Remote Reset, an Individual reset or
a Group reset (Call Types in Decode Identity). When a radio is reset the effect on
the radio will be as follows:
• Any Call Alerts will be stopped
• The Call LED flashing will stop
• If the channel is in Open mode then the channel is closed
• The PTT is optionally inhibited see PTT Inhibit After Reset Sequence.
• In searching - if paused on a selcall channel then searching resumes
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• If the Acknowledge property of a Decode Identity is set to 'Auto Interrogate' or
'Transpond & Auto Interrogate' then the Auto Interrogate encode identity is
transmitted.
Roaming
This is a process that allows changing between regional trunking systems which
have different Operator Identities (OPID 's). Not allowed on MPT1343 Systems.
RSSI
Received Signal Strength Indicator.
Scanning
Process of switching between the channels in the nominated search group in
cyclic sequence, stopping when the search condition (which may be to look for
either a free or a busy channel) is satisfied.
SDM
Short Data Message.
Search Group
A group of channels that are either scanned for a signal above the search
threshold or are compared and voted for the strongest signal
Selcall
Selective Calling - a system of signalling which allows 'dialling up' of specific
mobiles, portables and controllers. Such a system may be used to pass messages
as a data message to a specific user or group of users. It can be used to provide
remote switching facilities and to provide access control into community repeaters
or similar devices.
Selcall Mute
A state of the audio gate whereby the loudspeaker is muted (closed).
Selcall System
Selective Calling, uses a tone sequence at the start, and end, of a call to control
which members of a fleet react to the transmission.
SFM
Short Form Memory.
Sidetone
Sidetone is the audio which can be (optionally) heard when Selcall, DTMF and
toneburst transmissions are made.
Simplex
Mode of operation whereby the radio operates as a conventional fixed channel
radio outside the Trunking network.
Squelch
System used to prevent weak, unintelligible signals and random noise from being
heard by a radio operator while still allowing intelligible signals to be received
normally. This is accomplished by the use of a threshold below which any
received signals are ignored. Only signals whose signal-to-noise ratio is above the
squelch level cause the audio circuits of the radio to be enabled, with the result
that only satisfactory signals are received. The squelch level is specified in
SINAD.
Star (*) digits
Digits known as Status or Message digits. These digits are used for three
purposes:
• Status Digits for Selcall Identities
• Wildcard digits in Status strings
• Use in DTMF dialled strings - their use is network dependent to access special
services.
Status
A feature whereby a radio's status (or usually the status of the radio's user) can be
transmitted and a status message from other radios can be displayed. This
operates through status digits in Selcall identities. Either in Encode Identities or
Decode Identities as follows:
Encode Identities: Status digits within the identity are used to transmit the current
situation of the radio's user (e.g. "Out To Lunch").
Decode Identities: Status digits are looked up in a table (Status Menu) for possible
messages to display.
© TMC Radio 2006
page 55
TNM-U-E-0002 Issue 1
SRM9000 SERIES SERVICE MANUAL
SW
Software.
SYS
System Identity Code part of the CCSC.
TCXO
Temperature Compensated Crystal Oscillator.
Temporary
Temporary Registration; a process carried out by the Dispatcher due to some
system failure that prevents it from carrying out normal registration. The radios will
recognise this temporary registration mode but will otherwise use the network in
the same way as if they were registered. They may be required to re-register when
normal registration mode is resumed.
Three Tone Reset
This is a system whereby a call to a user automatically reset all other users in a
group.
Example: a call to user '12345' would call 12345 and reset all other users on this
channel with an identity 123nn where n can be any digit 0-9, A-F.
Timed Reset
Facility that causes the Radio, after a certain period of time, to restore current
channel to it's initial condition e.g. if it was previously searching it will resume
searching.
Time Shared
A time-shared control channel is one that is used by more than one site. This
allows a wide coverage area to be obtained using only one frequency.
The forward channel from the TSC to the radio is divided into timeslots. Each site
using the channel is allocated one timeslot in which to transmit and send
signalling.
Therefore, when on a timeshared channel. the radio may be able to receive bursts
of signalling from different sites at different signal strengths and may receive
periods when no signalling is received.
Depending on the type of system, the radio may be able to perform transactions
with any site it can receive from or only with a specific site.
TMR
Trunked Mobile Radio.
Tone Burst
An audio tone is transmitted at the start of transmission to inform a relay
(repeater) station to switch itself on to relay the transmission.
Transpond
An Acknowledge identity sent as a response to an individual call.
TRAXYS
Air Interface for the PTT Telecom Trunked Radio Network, used in the
Netherlands.
TSC
Trunking Site Controller. Central control required for the Trunking System to
function. Controls base stations.
Tx Inhibit
A facility which prevents the user from transmitting,(other than alarms), while the
channel is Busy.
UMP
User Memory Plug. A special device that contains the customisation data for the
radio. If this is removed then this can cause the radio to behave in a number of
ways.
User Defined Groups
These groups are set up by the user (contrast with Dynamic User Groups) when
the user desires to be included, temporarily, in an existing group. Up to 8 groups
may be defined (in addition to the Network group Idents defined by Network Group
Numbers). This feature is only available if User Defined Groups parameter is
enabled. These temporary groups are lost at switch off unless 'Save Groups at
Switch Off' is enabled.
© TMC Radio 2006
page 56
TNM-U-E-0002 Issue 1
SRM9000 SERIES SERVICE MANUAL
User Identity
This is a sequence of up to four digits entered by the user when the Radio is
switched on, if this option is programmed. These digits are then substituted into
any transmitted Selcall identity which includes # digits.
VCO
Voltage Controlled Oscillator.
Vote
Method used to compare the signal strength on a current channel with another
specified channel and then to choose the channel having the stronger signal.
Voting
Feature used during searching when there is more than one channel that satisfies
the required conditions. It involves examining all the channels that satisfy the
required conditions, and then selecting the channel with the highest signal
strength.
VOX
Voice Operated Transmit.
© TMC Radio 2006
page 57
TNM-U-E-0002 Issue 1

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Simoco Wireless Solutions SRM9000TU UHF MOBILE TRANSCEIVER User Manual SERVICE MANUAL

Simoco Australasia Pty Ltd UHF MOBILE TRANSCEIVER SERVICE MANUAL

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SERVICE MANUAL

FCC ID Filing: STZSRM9000TU

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