GM1200E Mobile Radio GM Series/GM1200E Service Manual 6864115B12

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GM1200E
Mobile Radio
Basic Service Manual
68P64115B12

European Publications Department (RPG) Fleet, Hampshire, England
Issue: May 1998

Cautions and Warnings

CAUTION

ELECTROSTATIC SENSITIVE DEVICES
PRECAUTIONS SHOULD BE TAKEN TO MINIMIZE THE RISK OF DAMAGE BY
ELECTROSTATIC DISCHARGE TO ELECTROSTATIC SENSITIVE DEVICES (ESDs).
ANY DEVICES EMPLOYING METAL OXIDE SILICON (MOS) TECHNOLOGY ARE
PARTICULARLY SUSCEPTIBLE.
CIRCUIT DIAGRAMS MARKED WITH THE ABOVE SYMBOL INDICATE ELECTRONIC
CIRCUITS (PECs) FOR WHICH ESD HANDLING PRECAUTIONS ARE NECESSARY.
THE USER SHOULD REFER TO BS5783, 1984: HANDLING OF ELECTROSTATIC
SENSITIVE DEVICES. THIS BRITISH STANDARD SUPERSEDES DEF STAN 59-98,
ISSUE 2.

iii

Cautions and Warnings

WARNING

SAFETY WARNINGS
THE ELECTRICAL POWER USED IN THIS EQUIPMENT IS AT A VOLTAGE HIGH
ENOUGH TO ENDANGER LIFE.
BEFORE CARRYING OUT MAINTENANCE OR REPAIR, PERSONS CONCERNED
MUST ENSURE THAT THIS EQUIPMENT IS ISOLATED FROM THE ELECTRICAL
SUPPLY AND TESTS ARE MADE TO ENSURE THAT ISOLATION IS COMPLETE.
WHEN THE SUPPLY CANNOT BE ISOLATED, MAINTENANCE AND REPAIR MUST BE
UNDERTAKEN BY PERSONS WHO ARE FULLY AWARE OF THE DANGERS INVOLVED
AND WHO HAVE TAKEN ADEQUATE PRECAUTIONS TO PROTECT THEMSELVES.
COMPONENTS CONTAINING BERYLLIUM OXIDE ARE USED IN THIS EQUIPMENT.
DUST FROM THIS MATERIAL IS A HEALTH HAZARD IF INHALED OR ALLOWED TO
COME INTO CONTACT WITH THE SKIN.
GREAT CARE MUST BE TAKEN WHEN HANDLING THESE COMPONENTS WHICH
MUST NOT BE BROKEN OR SUBJECTED TO EXCESSIVE HEATING. DEFECTIVE
COMPONENTS MUST BE DISPOSED OF IN ACCORDANCE WITH CURRENT
INSTRUCTIONS.
LEAD ACID BATTERIES MAY BE FITTED AS THE STANDBY BATTERY. CARE MUST BE
TAKEN WHEN REMOVING OR INSTALLING THESE BATTERIES TO:
1. ENSURE THAT THE TERMINALS ARE NOT SHORTED TOGETHER.
2. PREVENT SPILLAGE OF THE CORROSIVE ELECTROLYTE.

Cautions and Warnings

Contents

Basic Service Manual
Contents
Chapter
1.0

General
Gives a brief introduction into the manual; the service policy, models and
technical specifications.

2.0

Maintenance
Describes how to disassemble/assemble the radio for maintenance purposes
and provides lists of test equipment.

3.0

Accessories
Gives service details and provides a list of accessories available for the radio.

4.0

Radio Tuning Procedure
Provides detailed radio tuning procedure for all bands available.

Appendix
A.0

PL (CTCSS) / DPL Codes

B.0

External Device Connectors

C.0

Non Prescribed Data (NPD) Application Notes

Basic Service Manual

vii

Contents

viii

Basic Service Manual

Table of Contents

Chapter 1
General
Table of Contents
Paragraph

Page

1.0

Introduction ................................................................................................ 1

2.0

Scope of Manual ........................................................................................ 1

3.0

How to Use This Manual ............................................................................ 1

4.0

Warranty and Service Support ................................................................. 1

4.1

Warranty Period........................................................................................... 1

4.2
4.3
4.4
4.5

After Warranty Period ..................................................................................
Piece Parts ..................................................................................................
Technical Support........................................................................................
Associated Documentation ..........................................................................

5.0

Model Chart ................................................................................................ 3

5.1

Service Options ........................................................................................... 4

6.0

Technical Specifications ........................................................................... 5

6.1
6.2
6.3
6.4

General ........................................................................................................
Transmitter...................................................................................................
Receiver.......................................................................................................
Self-Quieting Frequencies ...........................................................................

General

2
2
2
2

5
5
6
6

1-i

Table of Contents

1-ii

General

Introduction

1.0

Introduction
This chapter outlines the scope and use of the basic service manual and provides an overview of
the warranty and service support.

2.0

Scope of Manual
This manual is intended for use by technicians familiar with similar types of equipment. It contains
levels 1 and 2 service information required for the equipment described and is current as of the
printing date. Changes which occur after the printing date maybe incorporated by a complete Basic
Service Manual revision to your Product Manual or alternatively as additionson a chapter basis.

3.0

How to Use This Manual
The basic service manual contains a general chapter giving information on warranty and support,
model charts and technical specifications. Chapters 2 and 3 contain level 1 and level 2 service
information for the radios and accessories respectively. Chapter 4 contains radio tuning procedures.
Refer to the Table of Contents for a general overview of the manual.

4.0

Warranty and Service Support
Motorola offers long term support for its products. This support includes full exchange and/or repair
of the product during the warranty period, and service/ repair or spare parts support out of warranty.
Any "return-for-exchange" or "return-for-repair" by an authorised Motorola Dealer must be
accompanied by a Warranty Claim Form. Warranty Claim Forms are obtained by contacting an
Authorised Motorola Dealer.

4.1

Warranty Period
The terms and conditions of warranty are defined fully in the Motorola Dealer or Distributor or
Reseller contract. These conditions may change from time to time and the following notes are for
guidance purposes only.
In instances where the product is covered under a "return for replacement" or "return for repair"
warranty, a check of the product should be performed prior to shipping the unit back to Motorola. To
ensure the product has been correctly programmed or has not been subjected to damage outside
the terms of the warranty.
Prior to shipping any radios back to the appropriate Motorola warranty depot, please contact
Customer Services. All returns must be accompanied by a Warranty Claim Form, available from
your Customer Services representative. Products should be shipped back in the original packaging,
or correctly packaged to ensure no damage occurs in transit.

General

1-1

Warranty and Service Support

4.2

After Warranty Period
After Warranty period, Motorola continues to support products in two ways.
Firstly, Motorola's Radio Parts and Service Group (RPSG) offer a repair service to both end users
and dealers at competitive prices.
Secondly, RPSG supplies individual parts and modules that can be purchased by dealers who are
technically capable of performing fault analysis and repair. To assist in this level of service, a
Detailed Service Manual containing level 3 repair information may be purchased separately.

4.3

Piece Parts
Some replacement parts, spare parts, and/or product information can be ordered directly. If a
complete Motorola part number is assigned to the part, it is available from Motorola Radio Parts and
Service Group (RPSG). If a generic part is listed or only a part description is listed, the part is not
normally available from Motorola. If a parts list is not included, this generally means that no userserviceable parts are available for that kit or assembly.
All orders for parts/information should include the complete Motorola identification number. All part
orders should be directed to your local RPSG office.
Head Office
Motorola G.m.b.H.
European Parts Department
65232 Taunusstein
Germany

4.4

Technical Support
Motorola Product Services is available to assist the dealer/distributors in resolving any malfunctions
which may be encountered. Initial contact should be by telephone whenever possible. When
contacting Motorola Technical Support, be prepared with the product model number and the unit’s
serial number.

4.5

1-2

Associated Documentation
Publication Number

Description

68P64115B15

GM1200E Detailed Service Manual (for Level 3 repair only)

68P64117B01

Shared Mobile Radio Systems (SMR) using MPT1327
A System Integrators Cookbook

68P02900X57-A

Data Application Notes for 1200 Series Radios

ELN4683A

1200 Series Product Manual

General

Model Chart

Description

GM1200E 403-470MHz 12.5kHz 25W DB

GM1200E 403-470MHz 25kHz 25W DB

GM1200E 403-470MHz 12.5kHz 25W KD

GM1200E 403-470MHz 25kHz 25W KD

GM1200E 136-174MHz 12.5kHz 25W DB

GM1200E 136-174MHz 25kHz 25W DB

GM1200E 136-174MHz 12.5kHz 25W KD

GM1200E 136-174MHz 25kHz 25W KD

M08RHA4CK5_N

M08RHA6CK5_N

M08RHH4CK6_N

M08RHH6CK6_N

M08KHA4CK5_N

M08KHA6CK5_N

M08KHH4CK6_N

M08KHH6CK6_N

Model Chart

Model

5.0

GM1200E
403-470 MHz UHF
136-174 MHz VHF
X = Indicates one of each required

Item
X

GCN6109_

Control Head Model K5 Blank

GCN6110_

Control Head Model K6 Keypad/Display

GMN6146_

Enhanced Compact Microphone

GLN7324_

Low Profile Trunnion Kit

GUE1124_

RF & HSG UHF 12.5kHz 5-25W

GUE1125_

RF & HSG UHF 25kHz 5-25W

GUD1326_

RF & HSG VHF 12.5kHz 5-25W

GUD1327_

RF & HSG VHF 25kHz 5-25W

GKN6270_

Power Cable

68P64110B08

GM1200E User Guide M/L

X
X

General

Packaging Kit

GBN6147_

X
X
X

Description

1-3

Model Chart

Description

GM1200E 403-470MHz 12.5kHz 25W DB

GM1200E 403-470MHz 25kHz 25W DB

GM1200E 403-470MHz 12.5kHz 25W KD

GM1200E 403-470MHz 25kHz 25W KD

GM1200E 136-174MHz 12.5kHz 25W DB

GM1200E 136-174MHz 25kHz 25W DB

GM1200E 136-174MHz 12.5kHz 25W KD

GM1200E 136-174MHz 25kHz 25W KD

M08RHA4CK5_N

M08RHA6CK5_N

M08RHH4CK6_N

M08RHH6CK6_N

M08KHA4CK5_N

M08KHA6CK5_N

M08KHH4CK6_N

M08KHH6CK6_N

Service Options

Model

5.1

GM1200E
403-470 MHz UHF
136-174 MHz VHF
X = Indicates one of each required

Item
X
X
X
X
X
X
X
X

1-4

Description

ENUD1061AS

GM1200E UHF 12.5kHz MD534AD

ENUD1062AS

GM1200E UHF 25kHz MD514AD

ENUD1063AS

GM1200E UHF 12.5kHz MD534AE

ENUD1064AS

GM1200E UHF 25kHz MD514AE

ENUE1071AS

GM1200E VHF 12.5kHz MD334AD

ENUE1072AS

GM1200E VHF 25kHz MD314AD

ENUE1073AS

GM1200E VHF 12.5kHz MD334AE

ENUE1074AS

GM1200E VHF 25kHz MD314AE

General

Technical Specifications

6.0

Technical Specifications

6.1

General

SPECIFICATION ITEM
Frequency Range

UHF: 403-470 MHz
VHF: 136-174 MHz

Channel Spacing

12.5 kHz or 20/25kHz

Frequency Stability

± 2ppm (UHF) / ± 5ppm (VHF)

Power Supply

10.8 to 15.6V dc, negative earth

Dimensions

K5 Model - 44x168x160 mm (HxWxD)
K6 Model - 55x185x167 mm (HxWxD)

Weight

1030g

Operational Temperature

- 25°C to + 55°C

Storage Temperature

- 40°C to + 85°C

Antenna Connection

50Ω BNC

Environmental
- Mechanical

- Electrical

6.2

TYPICAL VALUE

Vibration IEC 68/2/27 and Shock IEC 28/2/6
European Dust & Water protection IP54
ETS300-086
ETS300-113
ETS300-279
ETS300-219

Transmitter

SPECIFICATION ITEM

General

RF Specifications
Cyclic Keying Requirements
EMC Requirements
Signalling

TYPICAL VALUE

Channel Spacing

12.5kHz or 20/25kHz

Output Power

5-25W

Modulation Limiting

<± 2.5kHz (12.5kHz); <± 4kHz (20kHz);
<± 5kHz (25kHz)

FM hum & noise (CCITT)

>40dB (12.5kHz); >45dB (20/25kHz) CCITT

Conducted/Radiated Emission

<0.25µW (0.1...1000MHz); <1µW (1...4GHz)

Adjacent Channel Power

<-60dB (12.5kHz); <-70dB (20/25kHz)

Audio Response (300 - 3000 Hz)

Flat or pre-emphasised

Audio Distortion

<5% @ 1kHz, 60% deviation

Transmit turn on time

<25msec

1-5

Technical Specifications

6.3

Receiver

SPECIFICATION ITEM

6.4

TYPICAL VALUE

Channel Spacing

12.5kHz or 20/25kHz

Sensitivity @ 12.5kHz or 20/25kHz

< 0.35µV (12dB SINAD)

Intermodulation

>65dB ETS; >70dB with Base Option

Adjacent Channel Selectivity

>60dB (12.5kHz); >70dB (20/25kHz) ETS

Spurious Rejection

>70dB ETS

Audio Distortion @ Rated Audio

<5%

Hum and Noise (CCITT)

>40dB (12.5kHz); >45dB (20/25kHz) CCITT

Audio Response (300 - 3000 Hz)

Flat or De-Emphasised

Co-channel Rejection

<12dB (12.5kHz); <8dB (20/25kHz) ETS

Conducted /Radiated Emission

<2nW (0,1..1000MHz); <20nW (1..4GHz)

Receive after transmit time

<25msec

Audio Output Power

<13W external

Self-Quieting Frequencies
Self-quieting frequencies are frequencies that are also generated by the radio and cause internal
interference. On these frequencies the interference caused by the self-quieter spur is great enough
that a radio will not meet its receiver sensitivity specification.
The frequencies are:

1-6

UHF 403.2, 420, 436.8 and 453.6MHz.
VHF 151.2 and 168MHz.

General

Table of Contents

Chapter 2
Maintenance
Table of Contents
Paragraph

Page

1.0

Overview ..................................................................................................... 1

2.0

Disassemble the Radio ............................................................................. 1

2.1
2.2
2.3
2.4

Remove the Control Head ...........................................................................
Remove the Top Cover................................................................................
Remove the Transceiver Board ...................................................................
Disassemble the Control Head ....................................................................

3.0

Assemble Radio ......................................................................................... 4

3.1
3.2
3.3

Assemble the Control Head......................................................................... 4
Replace the Transceiver Board ................................................................... 4
Replace the Top Cover and Control Head................................................... 4

4.0

Exploded View Diagrams and Parts ......................................................... 5

5.0

Service Aids ............................................................................................... 7

6.0

Test Equipment .......................................................................................... 8

Maintenance

1
1
2
3

2-i

Table of Contents

2-ii

Maintenance

Overview

1.0

Overview
This chapter explains, step by step, how to disassemble and assemble the radio, to transceiver
board level. The chapter also contains a list of test equipment required to service the radio.

2.0

Disassemble the Radio

2.1

Remove the Control Head
Recess

Figure 2-1 Control Head Removal.

2.2

Insert a small flat blade screw driver, or similar, in the recess between the control head and the
transceiver (to minimise cosmetic damage to the radio cover start from the bottom side).

Press until the side of the control head releases and then repeat the operation on the opposite
side of the radio.

Pull the control head away from the transceiver.

Remove the flex from the socket on the control head board.

Remove the Top Cover
Recess

Figure 2-2 Top Cover Removal.
1.

Insert a small flat blade screw driver in the side recess of the radio chassis.

Lift the top cover over the chassis.

Maintenance

2-1

Disassemble the Radio

2.3

Remove the Transceiver Board
Protruding Tabs
Flex

Clip
Recess

Clip

Recess
Chassis

Transceiver Board

Top Cover

Figure 2-3 Transceiver Board Removal.
1.

Remove the power and antenna connector retaining clips by inserting a small flat blade screw
driver between the clip and the top of the chassis wall and gently prying the clip upwards.

Remove 13 screws from the transceiver board using a T8 TORX driver.

Carefully remove the transceiver board by rotating it out of the chassis:
Slowly lift the board on the front edge, the side with the connector that mates with the control
head, and pull gently toward the front of the radio.

CAUTION:

2.4

2-2

The thermal grease can act as an adhesive and cause the leads of the heat
dissipating devises to be over stressed if the board is lifted too quickly.

Disassemble the Control Head
1.

To remove the printed circuit board from the control head front housing, first split control head
into front and rear housing. In the front housing, insert a small blade screw driver in the side
groove near the four protruding tabs of the printed circuit board. Remove the board from the
control head front housing.

Remove the keypad from the control head housing by lifting up the rubber keypad. Care should
be taken not to touch or get other contaminates on the conductive pads on the under side of
the keypad or conductive contacts on the printed circuit board.

Remove the LCD module fom the LCD frame attached to the PCB.

Maintenance

Assemble Radio

Control Head
Housing
LCD Module

Recess
Keypad
Recess

Protruding
Tabs

Printed
Circuit
Board

Control Head
Housing Back

LAPD0014

Figure 2-4 Control Head Assembly.

3.0

Assemble Radio

3.1

Assemble the Control Head

3.2

3.3

Ensure that the LCD module and frame are correctly positioned on the PCB.

Place the keypad onto the board assembly, making sure the keypad is flush with the board.

During the installation of the printed circuit board, ensure the four protruding tabs snap into the
recesses.

Replace the Transceiver Board
1.

Inspect and if necessary, reapply thermal grease to the heatsinking pads in the chassis.

Before installing the connector retaining clips, ensure that the board is sitting flush on the
chassis mounting surface.

Install the 13 screws with 0.4 -07 NM (4-6 in lbs) of torque using a T8 TORX driver.

Replace the Top Cover and Control Head
1.

Position the top cover over the chassis and replace. Ensure that the cross snaps into the
recesses.

Connect the control head to the radio by the flex.

Maintenance

2-3

Exploded View Diagrams and Parts

Press the control head onto the radio chassis until the protruding tabs on the chassis snap into
the recesses inside the control housing, see Figure 2-5.
Recess

Figure 2-5 Control Head Replacement.

4.0

Exploded View Diagrams and Parts
Cover Chassis 1502609Y01
incl. Gasket Chassis
3202619Y01
Shield
2602640Y02

Screw M3x10
0310911A12

Shield
2602639Y01

Main
PCB

Accessory Conn. 16Pin
2804503J01

Controlhead K6

Power Conn. 0905902V04
Gasket 3205930V01
Flex
8402618Y01
Clip 4205938V01
Pad
7502618Y01
Gasket
Controlhead
3202620Y01

Connector 1580922V01

Antenna Conn.
0905901V02
incl. Gasket
3205929V01

Gasket Accessory Conn.
3202606Y01

Chassis
2702608Y02

Gasket Cover
3202607Y01

Figure 2-6 Radio Exploded View Diagram.

2-4

Maintenance

Exploded View Diagrams and Parts

Housing, back
1586001B01

Gasket
3286006B01

PCB
8486015B04

Keypad
7586002B01

LCD Frame
0786004B01

LCD Module
7286003B01

LCD Gasket
3286005B01

Housing, front
Control head
1586000B01

Figure 2-7 Control Head for Display/Keypad Radio Model.

Maintenance

2-5

Service Aids

5.0

Service Aids
The list in table 2-1 includes service aids recommended for working on the GM1200E radio.
Table 2-1 Service Aids.
PART No.

2-6

DESCRIPTION

APPLICATION

GTF376

Test Box Cable

Connects radio to GTF180 test box.

GTF374

Combined Interface
Cable

Connects radio to RLN4008 RIB.

GTF377

Combined Interface
Cable

Connects Databox radio to RLN4008 RIB.

GPN6133

Power Supply

Used to supply power to the radio.

GKN6266

DC Power Cable for radio

Interconnects radio to power supply.

GTF180

Test Box

Enables connection to the universal connector. Allows
switching for radio testing.

RLN4008

Radio Interface Box

Enables communications between the radio and the
computer’s serial communications adapter.

EPN4040

Power Supply

Used to supply power to the RIB (240 VAC).

EPN4041

Power Supply

Used to supply power to the RIB (220 VAC).

3080369B72

Computer Interface Cable

Connects the computer’s serial communications adapter
(9 pin) to the RIB.

3080369B71

Computer Interface Cable

Connects the computer’s serial communications adapter
(25 pin) to the RIB.

ENVN4001

MPT1327 1200E Series

DPS Dealer Software, 3.5” floppy disks.

ENVN4002

MPT1327 1200E Series

DPS Network Software, 3.5” floppy disks.

Maintenance

Test Equipment

6.0

Test Equipment
The list in table 2-2 includes all standard test equipment required for servicing two-way mobile
radios, as well as several unique items designed specifically for servicing the GM1200E radio.
Battery-operated test equipment is recommended when available. The “Characteristics” column is
included so that equivalent equipment may be substituted; however, when no information is provided
in this column, the specific Motorola model listed is either a unique item or no substitution is
recommended.
Table 2-2 Recommended Test Equipment.
MODEL No.

DESCRIPTION

CHARACTERISTICS

APPLICATION

This monitor will
substitute for items with
an asterisk (*)

Frequency/deviation meter
and signal generator for widerange troubleshooting and
alignment.

R2000 Series

System Analyser

*R1150C

Code Synthesizer

*S1053D
*HM-203-7
*SKN6008A
*SKN6001A

220 VAC Voltmeter
110 VAC Voltmeter
Power Cable for Meter
Test Leads for Meter

1mV to 300V, 10MΩ
Input impedance

Audio voltage measurements

*S1350C
*ST1213B (VHF)
*ST1223B (UHF)

Watt Meter
Plug-in Element
RF Dummy Load

50 ohm, ±5% accuracy
10 Watts, maximum
0-1000 MHz, 300W

Transmitter power o/p
measurements

R1065A

Load Resistor

10-watt Broadband

For use with Wattmeter

S1339A

RF Millivolt Meter
10kHz to 1.2 GHz

100µV to 3V RF

RF level measurements

*R1013A

SINAD Meter

S1347D or
S1348D
(programmable)

DC Power Supply

Injection of audio and digital
signalling codes

Receiver sensitivity
measurements
0-20Vdc, 0-5 Amps

Bench supply for 13.2Vdc
current limited

* Any of the R2000 Series system analysers will substitute for items with an asterisk (*)

Maintenance

2-7

Test Equipment

2-8

Maintenance

Table of Contents

Chapter 3
Accessories
Table of Contents
Paragraph

Page

1.0

GM1200E Accessory Connector Plan...................................................... 1

2.0

GM1200E Accessory Diagrams ................................................................ 2

2.1
2.2

2.7
2.8

Speaker GSN6059 5.5ins/130mm, 13 Watts............................................... 2
Handset HMN9416 (P/O HMN3141)
Mechanical Exploded View.......................................................................... 3
Enhanced Compact Microphone GMN6146
Mechanical Exploded View.......................................................................... 5
DTMF Microphone GMN6148
Mechanical Exploded View.......................................................................... 7
Base Tray GLN7318/GLN7326.................................................................. 11
Remote Mount Front / Rear Housing Kits GLN7331 / GLN7332
Mechanical Exploded View........................................................................ 12
Power Supply GPN6133 (EMC/CE Approved) .......................................... 13
Power Supply HPN8393 (Not EMC Approved).......................................... 14

3.0

List of Accessories.................................................................................. 16

2.3
2.4
2.5
2.6

Accessories

3-i

Table of Contents

3-ii

Accessories

GM1200E Accessory Connector Plan

1.0

GM1200E Accessory Connector Plan

CAUTION:

The accessory connections shown are not compatible to some other models of
Motorola radios. Check the appropriate accessory or technical manual for further
information.

+12V

Alternative

Alarm
Relay
+12V

+12V

Alternative

Alarm
Relay
+12V

CAUTION:

1. DO NOT short pin 1 or 16 on the accessory connector to ground, this may
damage the radio.

CAUTION:

Ensure correct position of the accessory connector.

Accessories

3-1

GM1200E Accessory Diagrams

2.0

GM1200E Accessory Diagrams

2.1

Speaker GSN6059 5.5ins/130mm, 13 Watts
130.0

130.0

100.0

55.0

1 + 16 connected

Cable
Length
2540 mm

135.0

30.0
80.0

3-2

Accessories

GM1200E Accessory Diagrams

2.2

Handset HMN9416 (P/O HMN3141)
Mechanical Exploded View

Mechanical Parts List
Ref
No.
1
2
3
4
5
6
7
8
9
10

Accessories

Motorola
Part No.
13-80928W01
15-82281R01
75-80927W01
30-06418T01
07-80148G02
15-84795P04
03-10908A91
03-10913B37

Description
Escutcheon
Top Housing
Top Housing Pad
Coil Cord Cable
Mic Cartridge (MK101)
Mic Gasket Bracket
Bottom Housing
Machine Screw
Tapping Screw
PTT Dome Switch (S11)

Ref
No.
11
12
13
14
15
16
17
18
19
20

Motorola
Part No.
38-84658P01
32-80272F16
03-10944A03
43-84312N01
01-80701Y77
75-80926W01
32-80282F02
61-80266F10

Description
PTT Button
Speaker (LS10)
Microphone Gasket
Not used
Tapping Screw
Reed Switch Spacer
Circuit Board Assembly
Circuit Board Pad
Lens Gasket
Display Lens

3-3

GM1200E Accessory Diagrams

2.2.1

Description
The HMN3141 Handset and hang-up cup is a slimline telephone handset with push to talk (PTT)
button. It is used in place of, and operates similar to, the standard mobile microphone.

2.2.2

Installation

General
When planning the installation of your handset, it is important that it does not interfere with the
operation of the vehicle or its accessories, nor disturb passenger seating or leg space. The handset
must be within convenient reach to the user. In general terms, the location of the handset should be
similar to the standard mobile microphone.

Adjustable Angle Bracket

3-4

Verify that the selected mounting surface is strong enough to support the mounting hardware.

Use the base of the adjustable angle bracket as a template, then centre punch and drill four
3.4mm diameter holes. Be careful not to damage any wires or other vital vehicle components
when drilling the holes.

Use the four M4x20mm tapping screws and the internal star lockwashers to mount and
secure the bracket.

Place the hang-up cup on top of the mounting surface of the mounting bracket and secure it
using the four M3.5x0.6x20mm machine screws, lockwashers, and hex nuts provided.

Select the angle between the two bases of the adjustable angle bracket (from 0 to 110
degrees) and tighten the two adjusting screws.

Accessories

GM1200E Accessory Diagrams

2.3

Enhanced Compact Microphone GMN6146
Mechanical Exploded View
4
6
5

7
2
3

Mechanical Parts List
Ref
No.
1
2
3
4

Motorola
Part No.
0180704Y99
0311994A23
5480104R12
5480104R02
1580566B02

Description
Rear Housing assembly
Screw (3 used)
Model Label (GMN6146C)
Model Label (GMN6146B)
Front Housing

Ref
No.
5

6
7

Motorola
Part No.
3880568B01
7580983Z03
4180150R01
3280565B01
3002593Y02

Description
PTT Button
Rubber Spacer
Spring Tension
Gasket MIC
Coiled Cord

Hang-Up Clip Parts List
Ref
No.
9
10

Accessories

Motorola
Part No.
03-00139913
01-80743T91

Description
Screw, 8-18x1/2 (3 used)
Hang-up clip

3-5

GM1200E Accessory Diagrams

Schematic Diagram

Electrical Parts Lists
Circuit
Ref

3-6

Motorola
Part No.

Description

Circuit
Ref

Motorola
Part No.

Description

R1300

1805500L04

RES VAR 2.2k (not
used)

C1306

2113741A21

CAP CHIP CL2 X7R 1n

C1307

2113741A21

CAP CHIP CL2 X7R 1n

R1301

0660076A57

RES CHIP 2.2k 5 1/8

C1308

2311049J26

R1302

0660076A43

RES CHIP 560 5 1/8

CAP TANT CHIP 10uF
16V

R1303

0660076A65

RES CHIP 4.7k 5 1/8

C1309

2311049J26

R1304

0660076A43

RES CHIP 560 5 1/8

CAP TANT CHIP 10uF
16V

R1305

0660076B05

RES CHIP 150k 5 1/8

C1310

2113741A21

CAP CHIP CL2 X7R 1n

R1306

0660076B13

RES CHIP 330k 5 1/8

C1311

2113743F12

CER CHIP CAP 330n

R1307

0660076A75

RES CHIP 12k 5 1/8

C1314

2113741A21

CAP CHIP CL2 X7R 1n

R1308

0660076A47

RES CHIP 820 5 1/8

C1315

2113741A21

CAP CHIP CL2 X7R 1n

2113741A21

CAP CHIP CL2 X7R 1n

R1309

0660076A51

RES CHIP 1.2k 5 1/8

C1316

R1310

0660076A51

RES CHIP 1.2k 5 1/8

Q1301

4813824A10

XSTR NPN 40V .2A

Q1302

4813824A10

XSTR NPN 40V .2A

D1301

4880140L15

DIODE SOT ZENER
10V

D1302

4880140L07

DIODE SOT ZENER
5.6V

4080164S01

SWITCH,PTT

5080258E04

ELECTRET MIC CTRG

8402571Y01

PCB RENA MIC BLK

C1301

2113740A38

CAP CHIP CL1 24p

C1302

2113741A21

CAP CHIP CL2 X7R 1n

C1303

2113741A61

CAP CHIP CL2 X7R
47n

C1304

2113741A51

CAP CHIP CL2 X7R
18n

C1305

2113741A21

CAP CHIP CL2 X7R 1n

Accessories

GM1200E Accessory Diagrams

2.4

DTMF Microphone GMN6148
Mechanical Exploded View

Mechanical Parts List
Ref
No.
1
2
3
4
5
6
7
8
9
10
11
12
13

Accessories

Motorola
Part No.
15-80652D02
32-80565B01
75-80983Z03
38-80654D01
41-80658D01
35-80089D02
75-80655D01
01-80707Y77
42-80656D01
01-80707Y78
01C80669D01
54-80104R10
03-139959

Description
Microphone front housing
Microphone gasket
Rubber Spacer, Switch
Button, push to talk
Spring, PTT
Felt baffle
Keypad
DTMF Encoder board assy
Spacer
Switch/Sidetone board assy
Microphone rear Housing
Mic label
Screw, thread forming

abc 2

def 3

mno 6

ghi

j kl

prs

tuv 8

wxy

opr 0

3-7

GM1200E Accessory Diagrams

Schematic Diagram

3-8

Accessories

SW0

SHOWN FROM SOLDER SIDE

8402685Y01 GEPD 5470

DS10

SW9

SW8

SW7

DS11

SW6

SW5

DS13

SW3

SW4

DS12

SW2
C26

C1301

R42

R43

C17

R33

R12

R23

R11

R32

C1302

CR1

Q1304

C1305

C20

C1306

Q1303

VR1301

R20

R22

R15

R14

R21

C12

C11

C13

R24

8402685Y01 GEPD 5469

C1314

VR1302

C1308
C1313

CR1301 R1307

C19

R6 C5

R1309

Q1302 R1306 C1307
C1312

C1304

SHOWN FROM COMPONENT SIDE

C29

C16

C15

VR5

C23

C24

C18

R1308

SW1
C14
R44

R16

R1303

R10
C1310

R13

R1305

R1310

C1309

R17

R1302

R19
C1311

R18

Accessories
C10

R40

GM1200E Accessory Diagrams

PCB Layout

3-9

GM1200E Accessory Diagrams

Electrical Parts List
GMN6148_
Circuit
Ref

3-10

Motorola
Part No.

Description

Circuit
Ref

Motorola
Part No.

Description

23-11049A07

1uF; 16V, 10%, TANT

CR12

48-83636N18

LED; GREEN, SMD

21-13740A73

560pF

CR13

48-83636N18

LED; GREEN, SMD

23-11049A59

10uF; 6V,10%, TANT

CR1301

48-13833C04

BAV70LT1

21-13740A59

150pF

4880214G02

MMBT 3904

21-13741A45

0.01uF

4880214G02

MMBT 3904

21-13741A45

0.01uF

4880214G02

MMBT 3904

21-13741A45

0.01uF

Q1302

48-80214G02

MMBT 3904

21-13740A59

150pF

Q1303

48-05128M19

MMBTA 13

C10

21-60521G37

0.1uF

Q1304

48-05128M16

MMBT 3906

C11

23-11049A07

1uF; TANT

06-60076B01

100K

C13

21-13740A59

150pF

06-60076B03

120K

C14

21-60521G37

0.1uF

06-60076A87

39K

C15

21-13740A40

30pF

06-60076A87

39K

C16

21-13740A40

30pF

06-60076A73

10K

C17

23-11049A07

1uF; TANT

06-60076B05

150K

C18

21-13741A45

0.01uF

06-60076B25

1Meg

C19

21-13740A59

150pF

06-60076B01

100K

C20

21-13741A45

0.01uF

R10

06-60076A73

10K

C23

23-11049A30

33uF, 6V, 10%, TANT

R11

06-60076B01

100K

C24

21-13740A79

1000pF

R12

06-60076A89

47K

C26

21-13740A79

1000pF

R13

06-60076A47

820

C29

23-11049A07

1uF; TANT

R14

06-60076A47

820

C1301

21-13740A39

27pF, 50V, NPO.

R15

06-60076A93

68K

C1302

21-13740A79

1000pF

R16

06-60076A73

10K

C1304

23-11049A59

10uF; 6V, 10%, TANT

R17

06-60076A87

39K

C1305

21-13743B23

0.330uF

R18

06-60076A89

47K

C1306

21-13740A59

150pF

R19

06-60076A73

10K

C1307

21-13740A79

1000pF

R20

06-60076A73

10K

C1308

21-11032B14

0.15uF

R21

06-60076B01

100K

C1309

21-13740A59

150pF

R22

06-60076A89

47K

C1310

21-13740A59

150pF

R23

06-60076A65

4.7K

C1311

21-13740A59

150pF

R24

06-60076A87

39K

C1312

21-13740A59

150pF

R32

18-60502A13

10K VAR; SMD

C1313

21-13740A59

150pF

R33

06-60076A63

3.9K

C1314

21-13741A45

0.01µF

R40

06-60076A65

4.7K

CR1

48-84336R03

MMBD 7000

R42

06-60076A84

30K

CR10

48-83636N18

LED; GREEN, SMD

R43

06-60076A84

30K

CR11

48-83636N18

LED; GREEN, SMD

R44

06-60076A25

100

Accessories

GM1200E Accessory Diagrams

GMN6148_ continued,
Circuit
Ref

2.5

Motorola
Part No.

Description

Circuit
Ref

Motorola
Part No.

Description

R1302

06-60076A57

2.2K; 5%, 1/8W

VR5

48-80140L05

4.7V; 5%, ZENER

R1303

06-60076A49

1K; 5%, 1/8W

VR1301

48-80140L17

12V; 5%, ZENER

R1305

06-60076B05

150K; 5%, 1/8W

VR1302

48-80140L17

12V; 5%, ZENER

R1306

06-60076M01

0; RES. JUMPER

48-80915W02

3.58 MHZ Resonator

R1307

06-60076B01

100K; 5%, 1/8W

50-80121L01

Transducer

R1308

06-60076A81

22K; 5%, 1/8W

50-13920A04

R1309

06-60076B01

100K; 5%, 1/8W

R1310

06-60076B01

100K; 5%, 1/8W

ADHESIVE, MIC
SHIELD, DTMF
ENCODER

SW1301

40-80164S01

SWITCH, PTT

30-02593Y02

COIL CORD W. IP54
BOOT

51-80662D01

MK53731D DTMF
DIALER I.C.

84-02685Y01

Circuit Board
EURO DTMF MIC

51-13819A02

LM2902D OPAMP

84-80661D01

U3 to
U5

51-80159R01

DUAL TRANSISTOR;
IMX1

Circuit Board,
Switch/sidetone

Base Tray GLN7318/GLN7326
Mechanical Parts List
Ref
No.
1
2
3
4
5
6

Accessories

Motorola
Part No.
1580155J02
7510606A06
0384725C09
4205722C02
1580154J02
7510606A13
5080085D03

Description
Base housing
Bumper RBR black
Screw 4.2x16
Clamp fastener
Cover base housing
Bumper black
Speaker (GLN7326)
Not shown

3-11

GM1200E Accessory Diagrams

2.6

Remote Mount Front / Rear Housing Kits GLN7331 / GLN7332
Mechanical Exploded View

GLN7331_
Remote Front Housing

Remote
mount
radio

Front housing PCB
GLN7333
Pad
7586011B01

External spe
connector

Remote mount
Radio front housing
1586010B01
Gasket for
Remote cable so
3205789W01

Flex connector
0902636Y01

Gasket
3205789W01

Remote cable
HKN6097 3m (3005825X02)
HKN6098 5m (3005825X01)
HKN6099 7m (3005825X03)

Remote Controlhead
back housing
1586012B01
Flex connector
interface
8402680Y02

External speaker
connector

Gasket for
Remote cable socket
3205789W01

Flex connector
0902636Y01

Remote Controlhead
back housing
1586012B01
Flex connector
interface
8402680Y02

5X02)
5X01)
5X03)
Controlhead

PCB
Controlhead

3-12

Gasket
Controlhead
3202620Y01

Remote mount
Bracket
0702457Y02

GLN7332_
Remote Back Housing

Accessories

GM1200E Accessory Diagrams

2.7

Power Supply GPN6133 (EMC/CE Approved)

Accessories

3-13

GM1200E Accessory Diagrams

2.8

Power Supply HPN8393 (Not EMC Approved)

Electrical Characteristics
Input Voltages:
105-125VAC; 210-250VAC, 47-63Hz
Output Voltage:
13.8VDC ±0.1 volts
(internally adjustable 11-15VDC)
Ripple:
less than 5mV peak to peak
(full load and low line)
Provides 8 amps continuous duty and 14 amps intermittent duty over an ambient temperature range
of -30 to +60°C .
(4 Pos) Positions 1 and 2 are positive power output terminals and positions 3 and 4 are for negative power output terminals for 14 amp max. current.
(6 Pos) Position 1 is negative power output terminal for 3 amp max current. Positions 2,3,6 are empty. Position
4 is positive 13.8VDC power output terminal. Position 5 is positive trickle charge output terminal.

3-14

Accessories

GM1200E Accessory Diagrams

Schematic Diagram

Accessories

3-15

List of Accessories

3.0

List of Accessories
Mechanical Hardware Kits:
GLN7324
GLN7317
GLN7320
GLN7325
HLN9457

Low Profile Trunnion Kit (Standard)
High Profile Trunnion Kit
In-Dash Mount, DIN install. Kit
IP54 seal, accessory connector
Accessory Connector Facility Kit

Microphones:
GMN6146
GMN6148
HMN3141
HMN3000

Enhanced Compact Microphone (Standard)
DTMF Microphone
Handset with Hang-up cup
Desk Microphone

Speakers:
Speaker connecting cables are provided with a 16-pin accessory connector plug.
GSN6059
13 W External Speaker, square

Cables:
GKN6270
GKN6271
ENKN4000

Battery power cable 3m, 10A fuse (Standard)
Ignition switch cable
MAP27 Interface Cable

Other
GKN6272
GLN7323
GLN7326
GPN6126
GPN6127
GPN6133
HPN4002
HPN8393

3-16

Alarm, Relay and Cable Kit
External PTT
Base Tray (with internal speaker)
24/12V DC Converter, 6A
24/12V DC Converter, 15A
EMC approved Power Supply
Non-EMC approved Power Supply
Non-EMC approved Power Supply

Accessories

Table of Contents

Chapter 4
Radio Tuning Procedure
Table of Contents
Paragraph

Page

1.0

GM1200E Tuning Procedure...................................................................... 1

1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
1.10
1.11
1.12

General ........................................................................................................
PA Bias Voltage...........................................................................................
Battery Threshold ........................................................................................
Transmitter Power .......................................................................................
Reference Oscillator ....................................................................................
Front-End Pre-Selector................................................................................
Rated Volume ..............................................................................................
Squelch........................................................................................................
Transmit Voltage Limit .................................................................................
Transmit Deviation Balance (Compensation) ..............................................
Transmit Deviation Limit ..............................................................................
Signalling Alignments ..................................................................................

Radio Tuning Procedure

1
2
3
3
4
4
5
6
6
6
7
7

4-i

Table of Contents

4-ii

Radio Tuning Procedure

GM1200E Tuning Procedure

1.0

GM1200E Tuning Procedure

1.1

General
The recommended hardware platform is a 386 or 486 DX 33 PC (personal computer) with 8 Mbytes
RAM, MS DOS 5.0™, Windows 3.1™, and DPS (Dealer Programming Software). These are
required to align the radio. Refer to your DPS Installation Manual for installation and setup
procedures for the required software; the user manual is accessed (and can be printed if required)
via the DPS.
To perform the alignment procedures, the radio must be connected to the PC, RIB (Radio Interface
Box), and Universal Test Set as shown in figure 4-1.
30 dB PAD

SERVICE MONITOR
OR COUNTER

30 dB PAD

WATTMETER

TRANSMIT

BNC
RF GENERATOR

SMA-BNC
58-80348B33

RECEIVE

AUDIO IN
MIC IN

TX
AUDIO GENERATOR

TEST SET
RTX4005/
GTF180

RADIO

TEST CABLE
GTF-376

SINAD METER
AC VOLTMETER

Note: Battery can be used in RIB
making power supply optional
25PIN
PROGRAM/TEST CABLE
GTF377 (Databox Radios only)
or GTF374

COMPUTER

15PIN
DATA

RIB
RLN-4008B

GND
COMPUTER INTERFACE CABLE
30-80369B72 (IBM "AT" 9PIN ONLY)
30-80369B71 (IBM "XT" 25PIN ONLY)

RIB POWER SUPPLY
EPN4041 (230 VAC. Euro)/
EPN4040 (230 VAC. UK)

Figure 4-1 Radio Alignment Test Setup
All tuning procedures are performed from the Service menu.
Before going into the Service menu, the radio must first be read using the File / Read Radio menu (if
the radio has just been programmed with data loaded from disk or from a newly created codeplug,
then it must still be read so that the DPS will have the radio’s actual tuning values).
All Service windows read and program the radio codeplug directly; you do NOT have to use the DPS
Read Radio / Write Radio functions to program new tuning values.
CAUTION:

Radio Tuning Procedure

DO NOT switch radios in the middle of any Service procedure. Always use the
Program or Cancel key to close the tuning window before disconnecting the radio.
Improper exits from the Service window may leave the radio in an improperly
configured state and result in seriously degraded radio or system performance.

4-1

GM1200E Tuning Procedure

The Service windows introduce the concept of the “Softpot”, an analog SOFTware controlled
POTentiometer used for adjusting all transceiver alignment controls. A softpot can be selected by
clicking with the mouse at the value or the slider or by hitting the TAB key until the value or the slider
is highlighted.
Each Service window provides the capability to increase or decrease the ‘softpot’ value with the
mouse, the arrow keys or by entering a value with the keyboard. The window displays the minimum,
maximum, and step value of the softpot. In addition transmitter tuning windows indicate the
transmitter frequency and whether the radio is keyed.
Adjusting the softpot value sends information to the radio to increase (or decrease) a DC voltage in
the corresponding circuit. For example, increasing the value in the Reference Oscillator tune window
instructs the radio microprocessor to increases the voltage across a varactor in the reference
oscillator to increase the frequency. Pressing the Program button stores all the softpot values of the
current window permanently in the radio.
In ALL cases, the softpot value is just a relative number corresponding to a D/A (Digital-to-Analog)
generated voltage in the radio. All standard measurement procedures and test equipment are
similar to previous radios.
Refer to the DPS on-line help for information on the tuning software.
Perform the following procedures in the sequence indicated.
Note:

1.2

All tuning procedures must be performed at a supply voltage of 13.2V unless otherwise
stated.
The Modulation Analyzer to measure the deviation should be set to frequency modulation
with de-emphasis switched off and all high pass filters switched off.

PA Bias Voltage
Adjustment of the PA Bias is critical for proper radio operation. Improper adjustment will result in
poor operation and may damage the PA FET device. For this reason, the PA bias must be set before
the transmitter is keyed the first time.
Note:

4-2

For certain radio models there are two bias voltage settings. For these radios both ‘ Bias 1
Voltage ’ and ‘ Bias 2 Voltage ‘ need to be adjusted when aligning the PA Bias. For models
that only have one bias voltage setting, the ‘ Bias 2 Voltage ‘ will be shown in grey on the
service menu.

From the Service menu, select Transmitter Alignment.

Select Bias Voltage Tuning to open the bias voltage tuning window. If the control voltage is out
of range, an error message will be displayed. In this case the radio hardware has a problem
and tuning must be stopped immediately.

Click the button labelled “0” to set the quiescent current temporarily to 0 mA

Measure the DC current of the radio. Note the measured value and add the specified quiescent
current shown in table 4-1. The result is the tuning target.

Adjust the current per the target calculated in step 4.

Click the Program button to store the softpot value.

Radio Tuning Procedure

GM1200E Tuning Procedure

Table 4-1 Quiescent Current Alignment

1.3

RF-Band

Target

UHF
VHF / 300-390MHz

440mA±10%
150mA±15%

Battery Threshold
The radio uses 2 battery threshold levels Tx High and Tx Low to determine the battery condition.
The Program buttons must only be activated when the power supply is set to the indicated voltage. If
the DPS detects that the voltage is not within the expected range for the threshold in question then a
message will be displayed to warn that the radio may not be set up correctly for the alignment
operation.
CAUTION:

1.4

Inadvertant use of the program buttons may result in radio failure.

From the Service menu, select Transmitter Alignment.

Select Battery Threshold to open the battery threshold tuning window. The current softpot
values are displayed for information only and cannot be edited.

Set the supply voltage to the value indicated for TX High.

Click the TX High Program button to store the softpot value for TX High.

Set the supply voltage to the value indicated for TX Low.

Click the TX Low Program button to store the softpot value for TX Low.

Close the window by clicking Cancel.

Transmitter Power
The radio has two power level settings, a high power level setting, and a low power level setting.
IMPORTANT: To set the transmitter power for customer applications use the Common Radio
Parameters window under the Edit menu and set the “Low Power Level” and “High Power Level”
powers to the desired values. Only if the transmitter components have been changed or the
transmitter does not transmit with the power set in the Common Radio Parameters window the
following procedure should be performed.
CAUTION:

When setting the Transmitter Power DO
RECOMMENDED POWER SET LIMITS of 25W.

NOT

EXCEED

THE

The advanced power setting technology employed in the radio makes use of two reference power
level settings along with parameters describing the circuit behaviour. To determine these parameters
the DPS requires the power values measured for two different settings.

Radio Tuning Procedure

4-3

GM1200E Tuning Procedure

From the Service menu, select Transmitter Alignment.

Select RF Power Tuning to open the RF power tuning window. The window will indicate the
transmit test frequencies to be used.

Select Point 1 value of the first frequency.

Click Toggle PTT to key the radio. The status bar will indicate that the radio is transmitting.

Measure the transmitter power on your power meter.

Enter the measured value in the box Point 1.

Select Point 2 value of the first frequency.

Measure the transmitter power on your power meter.

Enter the measured value in the box Point 2.

10. Click Toggle PTT to dekey the radio.
11. Repeat steps 3 - 10 for all test frequencies shown in the window.
12. Click Program to store the softpot values.

1.5

Reference Oscillator
Adjustment of the reference oscillator is critical for proper radio operation. Improper adjustment will
not only result in poor operation, but also a misaligned radio that will interfere with other users
operating on adjacent channels. For this reason, the reference oscillator should be checked every
time the radio is serviced. The frequency counter used for this procedure must have a stability of 0.1
ppm (or better).
1.

From the Service menu, select Transmitter Alignment.

Select Reference Oscillator to open the reference oscillator tuning window. The tuning window
will indicate the target transmit frequency.

Click Toggle PTT to key the radio. The status bar will indicate that the radio is transmitting.

Measure the transmit frequency on your frequency counter.

Adjust the reference oscillator softpot in the tuning window to achieve a transmit frequency
within the limits shown in table 4-2.

Click Toggle PTT again to dekey the radio and then press Program to store the softpot value.
Table 4-2 Reference Oscillator Alignment

1.6

RF-Band

Target

All bands

±150 Hz

Front-End Pre-Selector
Alignment of the front-end pre-selector is normally not required on these radios. Only if the radio has
poor receiver sensitivity or the pre-selector parts has been replaced the following procedure should
be performed. The softpot value sets the control voltage of the pre-selector. Its value needs to be set
at 7 frequencies across the frequency range.

4-4

Set the test box (GTF180) meter selection switch to the "Audio PA" position and connect a
SINAD meter to the "METER" port.

From the Service menu, select Receiver Alignment.

Select Front End Filter to open the pre-selector tuning window. The window will indicate the
receive test frequencies to be used.

Radio Tuning Procedure

GM1200E Tuning Procedure

Select the first test frequency shown, and set the corresponding value to the start value shown
in table 4-4.

Set the RF test generator to the receive test frequency, and set the RF level to 10µV modulated
with a 1 kHz tone at the normal test deviation shown in table 4-3.

Measure the RSSI voltage at accessory connector pin 15 with a dc voltmeter capable of 1 mV
resolution.

Change the softpot value by the stepsize shown in table 4-4 and note the RSSI voltage.The
target softpot value is achieved when the measured RSSI voltage change between step 6 and
step 7 is lower than the tuning target for the first time. The tuning target, shown in table 4-4, is
expressed as the percentage of the measured RSSI voltage and must be recalculated for every
tuning step. If the measured RSSI voltage decreases before the target value has been
achieved, approximation should be stopped and the current softpot value should be used as
target value. Set test box (GTF180) audio switch to the “SPKR” position. The 1 kHz tone must
be audible at the target value to make sure the radio is receiving.

Repeat steps 4 - 7 for all test frequencies shown in the window.

Click the Program button to store the softpot values.
Table 4-3 Normal Test Deviation.
Channel Spacing

Deviation

12.5 kHz
20 kHz
25 kHz

1.5 kHz
2.4 kHz
3 kHz

Table 4-4 Start Value for Front-End Pre-selector Tuning.

1.7

RF-Band

Target

Stepsize

Start Value

UHF
VHF
300-350MHz
336-390MHz

0.42%
0.5%
0.84%
0.31%

-2
+2
-2
-2

Maximum
Minimum
Maximum
Maximum

Rated Volume
The rated volume softpot sets the volume at normal test modulation.
1.

Set test box (GTF180) meter selection switch to the “AUDIO PA” position and the speaker load
switch to the "MAXAR" position. Connect an AC voltmeter to the test box meter port.

From the Service menu, select Receiver Alignment.

Select Rated Volume to open the rated volume tuning window. The screen will indicate the
receive test frequency to be used.

Set the RF test generator to the receive test frequency, and set the RF level to 1mVolt
modulated with a 1 kHz tone at the normal test deviation shown in table 4-3. Set test box
(GTF180) audio switch to the “SPKR” position. The 1 kHz tone must be audible to make sure
the radio is receiving.

Adjust the value of the softpot to obtain rated audio volume (as close to 3.87 Vrms).

Note:
6.

The voltage at the meter port of the testbox GTF180 is only half the voltage at the speaker.

Click the Program button to store the softpot value.

Radio Tuning Procedure

4-5

GM1200E Tuning Procedure

1.8

Squelch
The squelch softpots set the signal to noise ratio at which the squelch opens. The squelch value
needs to be set at 7 frequencies across the frequency range.

1.9

Set the test box (GTF180) meter selection switch to the "Audio PA" position and connect a
SINAD meter to the "METER" port.

From the Service menu, select Receiver Alignment.

Select Squelch Attenuation to open the squelch attenuation tuning window. The window will
indicate the receive test frequencies to be used.

Select the first test frequency shown, and set the corresponding value to 0.

Set the RF test generator to the test frequency and modulate the signal generator at the normal
test deviation shown in table 4-3, with 1 kHz tone. Adjust the generator for a 8-10 dB SINAD
level (weighted with psophometric filter).

Adjust the softpot value until the squelch just closes.

Monitor for squelch chatter; if chatter is present, repeat step 6.

When no chatter is detected, select the next softpot and repeat steps 4 - 7 for all test
frequencies shown in the window.

Click the Program button to store the softpot values.

Transmit Voltage Limit
The transmit control voltage limit softpot sets the maximum power control voltage. All 7 voltage limit
softpots are tuned and programmed automatically when the Program button is clicked.

1.10

From the Service menu, select Transmitter Alignment.

Select Voltage Limit to open the voltage limit tuning window.

Set the Power Factor to 1.3.

Click the Program button to store the softpot values.

Transmit Deviation Balance (Compensation)
Compensation alignment balances the modulation sensitivity of the VCO and reference modulation
(synthesiser low frequency port) lines. Compensation algorithm is critical to the operation of
signalling schemes that have very low frequency components (e.g. DPL) and could result in
distorted waveforms if improperly adjusted. The compensation value needs to be set at 7
frequencies across the frequency range.

4-6

From the Service menu, select Transmitter Alignment.

Select Modulation Attenuation to open the deviation balance tuning window. The window will
indicate the transmit test frequencies to be used.

Set the Test Box (GTF180) meter selector switch to the “GEN” position, and inject a 80 Hz tone
at 200 mVrms into the "Audio In" port. (The deviation measured at step 6 should be about
1-4kHz.) Connect an AC meter to the meter port to insure the proper input signal level.

Select the first test frequency shown in the window.

Click Toggle PTT to key the radio. The status bar will indicate that the radio is transmitting.

Measure the transmitter deviation.

Radio Tuning Procedure

GM1200E Tuning Procedure

Change the input tone to 3 kHz, 200 mVrms.

Adjust the deviation to within ±2% of the value recorded in step 6.

Check the deviation at 80 Hz again and repeat step 7-8, if it has changed since step 6.

10. Click the Toggle PTT to dekey the radio.
11. Repeat steps 3 - 10 for the remaining test frequencies.
12. Click the Program button to store the softpot values.
Note:

1.11

The step size change for step 8 is approximately 2.5% softpot value.

Transmit Deviation Limit
The transmit deviation limit softpot sets the maximum deviation of the carrier. The deviation value
needs to be set at 7 frequencies across the frequency range.
1.

From the Service menu, select Transmitter Alignment.

Select Reference Attenuation to open the reference attenuation tuning window.

Set the maximum value and press Program to store the softpot value.

From the Service menu, select Transmitter Alignment.

Select VCO Attenuation to open the deviation limit tuning window. The window will indicate the
transmit test frequencies to be used.

Set the Test Box (GTF180) meter selector switch to the “GEN” position, and inject a 1 kHz tone
at 800 mVrms into the "Audio In" port. Connect an AC meter to the meter port to ensure the
proper input signal level.

Select the first test frequency shown in the window.

Click the Toggle PTT to key the radio. The status bar will indicate that the radio is transmitting.

Adjust the transmitter deviation to the value shown in table 4-5.

10. Click the Toggle PTT to dekey the radio.
11. Repeat steps 8 - 10 for the remaining test frequencies.
12. Click the Program button to store the softpot values.
Table 4-5 Transmitter Deviation

1.12

Signalling Alignments

1.12.1

MPT RSSI Threshold Level

Channel Spacing

Deviation

12.5 kHz

2.2-2.3 kHz

20 kHz

3.4-3.6 kHz

25 kHz

4.3-4.6 kHz

The Program buttons must only be activated when the required signal is input to the radio and the
radio is receiving. If the DPS detects that the input signal is not within the expected range for the
RSSI level in question then a message will be displayed to warn that the radio may not be set up
correctly for the alignment operation.

Radio Tuning Procedure

4-7

GM1200E Tuning Procedure

CAUTION:

1.12.2

Inadvertant use of the program buttons may result in radio failure.

Set test box (GTF180) meter selection switch to the “AUDIO PA” position and the speaker load
switch to the "MAXAR" position.

From the Service menu, select Receiver Alignment.

Select RSSI to open the RSSI tuning window. The screen will indicate the receive test
frequency to be used.
The softpot values are displayed for information only and cannot be edited.

Set the RF test generator to the receive test frequency, and set the RF level to the value
indicated for RSSI Level 0, modulated with a 1 kHz tone at the normal test deviation shown in
table 4-3. Set test box (GTF180) audio switch to the “SPKR” position. The 1 kHz tone must be
audible to make sure the radio is receiving.

Click the Program button to store the softpot value for RSSI Level 0.

Repeat steps 4 - 5 for the remaining RSSI levels.

Click the Cancel button to close the window.

MPT1327 Transmit Deviation / DTMF Transmit Deviation
The MPT1327 Deviation Softpot is used to tune the FFSK signalling deviation. Tuning is performed
at one frequency. The radio generates an alternating bit pattern for tuning. Values for other
frequencies are calculated by the radio software.
The DTMF Deviation Softpot is used to tune the DTMF signalling deviation. Tuning is performed at
one frequency. The radio generates a DTMF signal for tuning. Values for other frequencies are
calculated by the radio software.
1.

From the Service menu, select Transmitter Alignment.

Select Signalling Deviation to open the signalling deviation tuning window.

Select the MPT value and click the Toggle PTT to key the radio. The status bar will indicate that
the radio is transmitting.

Adjust the transmitter deviation to the value shown in table 4-6.

Click the Toggle PTT to dekey the radio.

Repeat steps 3 - 5 for DTMF deviation.

Click the Program button to store the softpot value.
Table 4-6 Signalling Deviation

4-8

Channel Spacing

MPT 1327

Deviation

12.5 kHz

1.4-1.6 kHz

1.5-1.8 kHz

20 kHz

2.2-2.6 kHz

2.4-2.8 kHz

25 kHz

2.8-3.2 kHz

3.0-3.4 kHz

Radio Tuning Procedure

Table of Contents

Appendix A
PL/DPL Codes
Table of Contents
Paragraph

Page

1.0

PL Codes and Digital PL (DPL) Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.1
1.2

PL Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Digital PL (DPL) Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

PL (CTCSS) Codes

A-i

Table of Contents

A-ii

PL (CTCSS) Codes

PL Codes and Digital PL (DPL) Codes

1.0

PL Codes and Digital PL (DPL) Codes
The following have been tested and are acceptable for programming into any transmit or receive
frequency.

1.1

PL Codes
GROUP A

1.2

GROUP B

GROUP C

Code

Freq

Code

Freq

Code

Freq

XZ
XB
YB
1Z
1B
2A
3Z
3B
4A
5Z
6A
7Z
M1
M3

67.0
77.0
88.5
100.0
107.2
114.8
123.0
131.8
141.3
151.4
173.8
186.2
203.5
218.1

XA
YZ
ZA
1A
2Z
2B
3A
4Z
4B
5A
6Z
6B
7A
M2

71.9
82.5
94.8
103.5
110.0
118.8
127.3
136.5
146.2
156.7
167.9
179.9
192.8
210.7

WZ
WA
WB
YA
ZZ
ZB
5B
8Z

69.3
74.4
79.7
85.4
91.5
97.4
162.2
206.5

026
051
073
125
152
174
243
255
274
332
365
431
455
506
565
632
723

031
053
074
131
155
205
244
261
306
343
371
432
462
516
606
654
731

032
054
114
132
156
212
245
263
311
346
411
445
464
523
612
662
732

036
065
115
134
162
223
246
265
315
351
412
446
465
526
624
664
734

Digital PL (DPL) Codes:
023
043
071
116
143
165
225
251
266
325
356
413
452
466
532
627
703
743

PL (CTCSS) Codes

025
047
072
122
145
172
226
252
271
331
364
423
454
503
546
631
712
754

A-1

PL Codes and Digital PL (DPL) Codes

A-2

PL (CTCSS) Codes

Table of Contents

Appendix B
NPD Application Notes
Table of Contents
Paragraph

Page

1.0

Non Prescribed Data (NPD) Calls............................................................. 1

2.0

Calls with DTE connected to External Data Connector
(Radio Accessory Connector) .................................................................. 1

2.1
2.2

DTE Initiated Call (Outgoing Calls).............................................................. 1
Calls Initiated by another Radio Unit (Incoming Calls) ................................ 1

3.0

Calls with DTE connected to Internal Data Connector
(Radio Option Connector)......................................................................... 1

3.1
3.2

DTE Initiated Call (Outgoing Calls).............................................................. 1
Calls Initiated by another Radio Unit (Incoming Calls) ................................ 2

4.0

Other Calls.................................................................................................. 2

4.1
4.2
4.3

Voice Calls................................................................................................... 2
Status Calls.................................................................................................. 2
Mixed Calls .................................................................................................. 2

NPD Application Notes

B-i

Table of Contents

B-ii

NPD Application Notes

Non Prescribed Data (NPD) Calls

1.0

Non Prescribed Data (NPD) Calls
Non Prescribed Data calls utilising external Data Terminal Equipment (DTE) can be made using the
GM1200E Databox radio as the carrier.
Call protocol is by a combination of control line handshakes, the complexity of which depends on the
intelligence of the DTE.

2.0

Calls with DTE connected to External Data Connector
(Radio Accessory Connector)

2.1

DTE Initiated Call (Outgoing Calls)
■
■

■
■

2.2

Call set-up is initiated on ‘Call 1’ which should be programmed with an address including the
‘Non Prescribed Data’ (NPD) call modifier (*31*).
When the traffic channel data path is set up, the radio will enable the audio input and output
lines (with the microphone and loudspeaker lines disabled) and then signal that the DTE is
Clear to Send (CTS).
The DTE will send and receive audio signals using the PTT line as direction control.
Call clear can be from either DTE or radio.
DTE will remove the signal from ‘Call 1’ or signal on ‘Call Clear’.
Radio will remove the CTS line signal.

Calls Initiated by another Radio Unit (Incoming Calls)
■
■
■

Incoming calls will be indicated by a signal on the CTS.
The call will be “answered” by the DTE signalling on ‘Call 1’.
The call will continue and clear as described above in section 2.1

3.0

Calls with DTE connected to Internal Data Connector
(Radio Option Connector)

3.1

DTE Initiated Call (Outgoing Calls)
It is possible for the radio to call up to 3 different destinations (addresses) by using a combination of
Call 1 and Call 2 lines to signal one of three possibilities (Call N).
■
■

■
■

Call set-up is initiated on ‘Call N’ which should be programmed with an address including the
‘Non Prescribed Data’ (NPD) call modifier (*31*).
When the traffic channel data path is set up, the radio will enable the audio input and output
lines (with the microphone and loudspeaker lines disabled) and then signal that the DTE is
Clear to Send (CTS).
The DTE will send and receive audio signals using the PTT line as direction control.
Call clear can be from either DTE or radio.
DTE will remove the signal from ‘Call N’ or signal on ‘Call Clear’.
Radio will remove the CTS line signal.

NPD Application Notes

B-1

Other Calls

3.2

Calls Initiated by another Radio Unit (Incoming Calls)
■
■
■

Incoming calls will be indicated by a signal on the CTS.
The call will be “answered” by the DTE signalling on ‘Call 3’ (i.e.Call 1 and Call 2 lines both
enabled).
The call will continue and clear as described above in section 3.1

4.0

Other Calls

4.1

Voice Calls
It is possible to set up voice calls internally or externally using the procedures described above by
omitting the NPD call modifier from the called address. In this case the audio paths will be set up to
use the external microphone and loudspeaker with the volume pre-set. It is not possible to adjust the
volume from inside the radio.

4.2

Status Calls
It is possible to signal status calls internally or externally.
■
■
■

4.3

Status is sent by signalling on ‘Call N’ to a pre-set address using the Status call modifier.
The radio will send the pre-set status call to the pre-programmed address.
Call “success” will be signalled with a pulse on the CTS line.

Mixed Calls
Due to the ambiguity necessarily introduced by the very simple handshaking techniques employed,
users should only consider mixing Data/Voice/Status calls if they are confident that their DTE is
capable of correctly interpreting the handshakes under all conditions for all incoming and outgoing
call types likely to be encountered.

B-2

NPD Application Notes

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Author                          : Colin Bullen / Motorola RPG EMEA
Create Date                     : 1998:06:02 09:00:00Z
Modify Date                     : 2011:06:28 11:42:30-04:00
Subject                         : Basic Service Manual  -  68P64115B12 [EN]
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Creator                         : Colin Bullen / Motorola RPG EMEA
Description                     : Basic Service Manual  -  68P64115B12 [EN]
Title                           : GM1200E Mobile Radio
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GM1200E Mobile Radio GM Series/GM1200E Service Manual 6864115B12

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