Motorola Uhf Manual

 Professional Radio
GM Series
UHF (403-470MHz)
Service Information
Issue: September 2000 

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Computer Software Copyrights
The Motorola products described in this manual may include copyrighted Motorola computer programs stored 
in semiconductor memories or other media. Laws in the United States and other countries preserve for 
Motorola certain exclusive rights for copyrighted computer programs, including the exclusive right to copy or 
reproduce in any form, the copyrighted computer program. Accordingly, any copyrighted Motorola computer 
programs contained in the Motorola products described...

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Table of Contents
Chapter 1 MODEL CHART AND TECHNICAL SPECIFICATIONS
1.0 GM140/GM160 Model Chart ................................................................................ 1-1
2.0 GM340/GM360/GM380 Model Chart ................................................................... 1-1
3.0 GM640/GM660/GM1280 Model Chart ................................................................. 1-2
4.0 Technical Specifications...

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Chapter 3 TROUBLESHOOTING CHARTS
1.0 Troubleshooting Flow Chart for Receiver (Sheet 1 of 2) ..................................... 3-1
1.1 Troubleshooting Flow Chart for Receiver (Sheet 2 of 2) ..................................... 3-2
2.0 Troubleshooting Flow Chart for 25W Transmitter (Sheet 1 of 3) ......................... 3-3
2.1 Troubleshooting Flow Chart for 25W Transmitter (Sheet 2 of 3) ......................... 3-4
2.2 Troubleshooting Flow Chart for 25W Transmitter (Sheet 3 of 3)...

Chapter 1
MODEL CHART AND TECHNICAL SPECIFICATIONS
1.0 GM140/GM160 Model Chart
GM Series UHF 403-470 MHz
Model Description
MDM25RKC9AA1_EGM140, 403-470 MHz, 25-40W, 4 Ch
MDM25RKF9AA5_E GM160, 403-470 MHz, 25-40W, 128 Ch
Item Description
XGCN6112_Control Head GM140
X GCN6114_ Control Head GM160
XIMUE6024_SField Replaceable Unit (Main Board) GM140
X IMUE6024_S Field Replaceable Unit (Main Board) GM160
XXENBN4056_Packaging, Waris Mobile Radio
X X GLN7324_ Low Profile Mounting Trunnion
XXHKN9402_12V Power...

1-2 MODEL CHART AND TECHNICAL SPECIFICATIONS
2.0 GM340/GM360/GM380 Model Chart
GM Series UHF 403-470 MHz
Model Description
MDM25RHC9AN1_EGM340, 403-470 MHz, 1-25W, 6 Ch
MDM25RHF9AN5_E GM360, 403-470 MHz, 1-25W, 255 Ch
MDM25RHN9AN8_EGM380, 403-470 MHz, 1-25W, 255 Ch
Item Description
X GCN6112_ Control Head GM340
XGCN6120_Control Head GM360
X GCN6121_ Control Head GM380
XIMUE6015_SField Replaceable Unit (Main Board) GM340
X IMUE6015_S Field Replaceable Unit (Main Board) GM360
XIMUE6038_SField Replaceable...

GM640/GM660/GM1280 Model Chart1-3
3.0 GM640/GM660/GM1280 Model Chart
GM Series UHF 403-470 MHz
Model Description
MDM25RHC9CK1_EGM640, 403-470 MHz, 1-25W, 6 Ch
MDM25RHF9CK5_E GM660, 403-470 MHz, 1-25W, 255 Ch
MDM25RHN9CK8_EGM1280, 403-470 MHz, 1-25W, 255 Ch
Item Description
X GCN6112_ Control Head GM640
XGCN6120_Control Head GM660
X GCN6121_ Control Head GM1280
XIMUE6009_SField Replaceable Unit (Main Board) GM640
X IMUE6009_S Field Replaceable Unit (Main Board) GM660
XIMUE6009_SField Replaceable Unit...

1-4 MODEL CHART AND TECHNICAL SPECIFICATIONS
4.0 Technical Specifications
Data is specified for +25°C unless otherwise stated.
General Specifications
Channel Capacity
GM140
GM160
GM340
GM360
GM380
GM640
GM660
GM1280
4
128
6
255
255
6 
255
255
Power Supply 13.2Vdc (10.8 - 15.6Vdc)
Dimensions:  H x W x D (mm)  Depth excluding knobsGM140/340/640
56mm x 176mm x 177mm (1 - 25W)
56mm x 176mm x 189mm (25 - 45W)
(add 8mm for Volume Knob)
Dimensions:  H x W x D (mm)  Depth excluding knobsGM160/360/660
59mm x 179mm x...

Technical Specifications1-5
*Availability subject to the laws and regulations of individual countries.
Transmitter UHF
*Frequencies - Full BandsplitUHF 403-470 MHz
Channel Spacing12.5/20/25 kHz
Frequency Stability
(-30°C to +60°C, +25° Ref.)±2.0 ppm
Power 1-25W/25-40W
Modulation Limiting±2.5 @ 12.5 kHz 
±4.0 @ 20 kHz
±5.0 @ 25 kHz
FM Hum & Noise-40 dB @ 12.5kHz
-45 dB @ 20/25kHz
Conducted/Radiated Emission (ETS)-36 dBm 1 GHz
Adjacent Channel Power-60 dB @ 12.5 kHz
-70 dB @ 25 kHz
Audio Response (300 -...

1-6 MODEL CHART AND TECHNICAL SPECIFICATIONS