Motorola Gm Series Detailed 6864115b62 B Manual
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Professional Radio GM Series VHF (136-174MHz) Service Information Issue: August 2002
ii 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 in this manual may not be copied or reproduced in any manner without the express written permission of Motorola. Furthermore, the purchase of Motorola products shall not be deemed to grant, either directly or by implication, estoppel or otherwise, any license under the copyrights, patents or patent applications of Motorola, except for the normal non-exclusive royalty- free license to use that arises by operation of law in the sale of a product.
iii 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 ...................................................................................... 1-3 Chapter 2 THEORY OF OPERATION 1.0 Introduction .......................................................................................................... 2-1 2.0 VHF (136-174MHz) Receiver............................................................................... 2-1 2.1 Receiver Front-End ....................................................................................... 2-1 2.1 Front-End Band-Pass Filters & Pre-Amplifier ................................................. 2-2 2.2 First Mixer and High Intermediate Frequency (IF) .......................................... 2-2 2.3 Low Intermediate Frequency (IF) and Receiver Back End ............................. 2-2 3.0 VHF (136-174MHz) Transmitter Power Amplifier (PA) 25 W..................... 2-3 3.1 First Power Controlled Stage .......................................................................... 2-3 3.2 Power Controlled Driver Stage ....................................................................... 2-4 3.3 Final Stage...................................................................................................... 2-4 3.4 Directional Coupler......................................................................................... 2-4 3.5 Antenna Switch............................................................................................... 2-5 3.6 Harmonic Filter ............................................................................................... 2-5 3.7 Power Control ................................................................................................. 2-5 4.0 VHF (136-174MHz) Frequency Synthesis ........................................................... 2-6 4.1 Reference Oscillator ....................................................................................... 2-6 4.2 Fractional-N Synthesizer ................................................................................ 2-6 4.3 Voltage Controlled Oscillator (VCO) ............................................................... 2-7 4.4 Synthesizer Operation .................................................................................... 2-8 5.0 VHF (136-174MHz) Transmitter Power Amplifier (PA) 45 W.................... 2-9 5.1 Power Controlled Stage .................................................................................. 2-9 5.2 Pre-Driver Stage ........................................................................................... 2-10 5.3 Driver Stage .................................................................................................. 2-10 5.4 Final Stage.................................................................................................... 2-10 5.5 Directional Coupler....................................................................................... 2-10 5.6 Antenna Switch............................................................................................. 2-11 5.7 Harmonic Filter ............................................................................................. 2-11 5.8 Power Control ............................................................................................... 2-11
iv 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) ......................... 3-3 3.0 Troubleshooting Flow Chart for 45W Transmitter (Sheet 1 of 2) ......................... 3-4 3.1 Troubleshooting Flow Chart for 45W Transmitter (Sheet 2 of 2) ......................... 3-4 4.0 Troubleshooting Flow Chart for Synthesizer........................................................ 3-5 5.0 Troubleshooting Flow Chart for VCO ................................................................... 3-6 Chapter 4 VHF PCB/SCHEMATICS/PARTS LISTS 1.0 Allocation of Schematics and Circuit Boards ....................................................... 4-1 1.1 Controller Circuits ................................................................................................ 4-1 2.0 VHF 1-25W PCB 8486172B04 / Schematics....................................................... 4-3 2.1 VHF 1-25W PCB 8486172B04 Parts List ......................................................... 4-10 3.0 VHF 1-25W PCB 8486172B06 / Schematics..................................................... 4-13 3.1 VHF 1-25W PCB 8486172B06 Parts List .......................................................... 4-20 4.0 VHF 1-25W PCB 8486172B07 / Schematics..................................................... 4-23 4.1 VHF 1-25W PCB 8486172B07 Parts List .......................................................... 4-27 5.0 VHF 1-25W PCB 8486172B08 / Schematics..................................................... 4-31 5.1 VHF 1-25W PCB 8486172B08 Parts List .......................................................... 4-38 6.0 VHF 25-45W PCB 8486140B12 / Schematics................................................... 4-41 6.1 VHF 25-45W PCB 8486140B12 Parts List ........................................................ 4-44 7.0 VHF 25-45W PCB 8486140B13 / Schematics................................................... 4-47 7.1 VHF 25-45W PCB 8486140B13 Parts List ........................................................ 4-49 8.0 VHF 25-45W PCB 8486140B15 / Schematics................................................... 4-52 8.1 VHF 25-45W PCB 8486140B15 Parts List ........................................................ 4-59
Chapter 1 MODEL CHART AND TECHNICAL SPECIFICATIONS 1.0 GM140/GM160 Model Chart GM Series VHF 136-174 MHz Model Description MDM25KKC9AA1_EGM140, 136-174 MHz, 25-40W, 4 Ch MDM25KKF9AA5_E GM160, 136-174 MHz, 25-40W, 128 Ch MDM25KHC9AA1_EGM140, 136-174 MHz, 1-25W, 4 Ch MDM25KHF9AA5_E GM160, 136-174 MHz, 1-25W, 128 Ch Item Description XXGCN6112_Control Head GM140 X X GCN6114_ Control Head GM160 XIMUD6011_Tanapa, GM140 X IMUD6011_ Tanapa, GM160 XIMUD6010_Tanapa, GM140 X IMUD6010_ Tanapa, GM160 XXXXENBN4056_Packaging, Waris Mobile Radio XXXXGLN7324_ Low Profile Mounting Trunion XXHKN9402_12V Power Cable, 25-45W X X HKN4137_ 12V Power Cable, 1-25W XXXXMDRMN4025_Enhanced Compact Microphone X X 6864110B86_ User Guide, GM140 XX6864110B87_User Guide, GM160 X = Indicates one of each is required
1-2 MODEL CHART AND TECHNICAL SPECIFICATIONS 2.0 GM340/GM360/GM380 Model Chart GM Serie s V HF 13 6-174 MHz Model Description MDM25KHC9AN1_EGM340, 136-174 MHz, 1-25W, 6 Ch MDM25KHF9AN5_E GM360, 136-174 MHz, 1-25W, 255 Ch MDM25KHC9AN8_EGM380, 136-174 MHz, 1-25W, 255 Ch M DM 25K HA9A N 0_E Datab ox, 1 36-1 74 MHz, 1-2 5W , 16 C h Item Description XGCN6112_Control Head GM340 X GCN6120_ Control Head GM360 XGCN6121_Control Head GM380 X GCN6116_ Databox Radio Blank Head XIMUD6013_SField Replaceable Unit (Main Board) GM340 X IMUD6013_S Field Replaceable Unit (Main Board) GM360 XIMUD6024_SField Replaceable Unit (Main Board) GM380 X IM UD 601 5_A S/T 1 36-1 74 M Hz 1 -25 SEL5 XXXXENBN4056_Packaging, Waris Mobile XXXXGLN7324_ Low Profile Mounting Trunnion XXXXHKN4137_12V Power Cable 1-25W X X X MDRMN4025_ Enhanced Compact Microphone X6864110B80User Guide GM340 X 6864110B81 User Guide, GM360 X6864110B82User Guide, GM380 X = Indicates one of each is required
GM640/GM660/GM1280 Model Chart1-3 3.0 GM640/GM660/GM1280 Model Chart GM Series VHF 136 -174 M Hz Model Description MDM25KHC9CK1_EGM640, 136-174 MHz, 1-25W, 6 Ch MDM25KHF9CK5_E GM660, 136-174 MHz, 1-25W, 255 Ch MDM25KHN9CK8_EGM1280, 136-174 MHz, 1-25W, 255 Ch M DM 25K HA9C K7_E Dat ab ox, 13 6-1 74 MHz, 1-2 5W , 16 C h Item Description XGCN6112_Control Head GM640 X GCN6120_ Control Head GM660 XGCN6121_Control Head GM1280 X GCN6116_ Databox Radio Blank Head XIMUD6018_SField Replaceable Unit (Main Board) GM640 X IMUD6018_S Field Replaceable Unit (Main Board) GM660 XIMUD6018_SField Replaceable Unit (Main Board) GM1280 X IM UD 6018_ S S/T 136-174 MHz 1 -25 S EL5 XXXXENBN4056_Packaging, Waris Mobile Radio XXXXGLN7324_ Low Profile Mounting Trunnion XXXXHKN4137_12V Power Cable, 1-25W X X X MDRMN4025_ Enhanced Compact Microphone X6864110B83_User Guide, GM640 X 6864110B84_ User Guide, GM660 X6864110B85_User Guide, GM1280 X = Indicates one of each is required
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 Databox 4 128 6 255 255 6 255 255 16 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 186mm (1 - 25W) 59mm x 179mm x 198mm (25 - 45W) (add 9mm for Volume Knob) Dimensions: H x W x D (mm) Depth excluding knobsGM380/1280 188mm x 185mm x 72mm (add 8mm for Volume Knob) Dimensions: H x W x D (mm) Depth excluding knobsDatabox 44mm x 168mm x 161mm Weight GM140/340/640 1400gr Weight GM160/360/660 1400gr Weight GM380/1280 1500gr Weight Databox 1220gr Sealing:Withstands rain testing per MIL STD 810 C/D /E and IP54 Shock and Vibration:Protection provided via impact resistant housing exceeding MIL STD 810-C/D /E and TIA/EIA 603 Dust and Humidity:Protection provided via environment resistant housing exceeding MIL STD 810 C/D /E and TIA/EIA 603
Technical Specifications1-5 *Availability subject to the laws and regulations of individual countries. Transmitter VHF *Frequencies - Full BandsplitVHF 136-174 MHz Channel Spacing12.5/20/25 kHz Frequency Stability (-30°C to +60°C, +25° Ref.)±2.5 ppm Power 1-25W / 25-45W 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 - 3000Hz)+1 to -3 dB Audio Distortion @1000Hz, 60% Rated Maximum Deviation 65 dB Base Mode: >70dB (1-25W model only) Adjacent Channel Selectivity (ETS)65 dB @ 12.5 kHz 75 dB @ 20 kHz 80 dB @ 25 kHz Spurious Rejection (ETS)75 dB @ 12.5 kHz 80 dB @ 20/25 kHz Rated Audio3W Internal 13W External Audio Distortion @ Rated Audio