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 prod. Hello everyone, I'm having a bit of trouble with programming my Motorola GM 338 uhf 450-525MHz. I can edit/ change the frequency of the current channels but I cannot add anymore channels, I've only got about 20 channels and there's.
UHF 25-40W PCB / Schematics / Parts List4-13. Motorola Depot Servicing only Reference designators with an asterisk indicate components which are not field replaceable because they need to be calibrated with specialized factory equipment after installation. Radios in which these parts have been replaced in the field will be off frequency at temperature extremes. 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. I Table of Contents Section 1 Model Chart and Technical Specifications 1.0 GM338 Model Chart. 1-1 2.0 Technical Specifications. 1-1 Section 2 Theory of Operation 1.0 Introduction. 2-1 2.0 UHF (450-520 MHz) Receiver. 2-1 2.1 Receiver Front-End.
2-1 2.2 Front-End Band-Pass Filters & Pre-Amplifier. 2-2 2.3 First Mixer and High Intermediate Frequency (IF). 2-2 2.4 Low Intermediate Frequency (IF) and Receiver Back End. 2-3 3.0 Transmitter Power Amplifier (PA) 40W. 2-3 3.1 Power Controlled Stage.
2-4 3.2 Pre-Driver Stage. 2-4 3.3 Driver Stage.
2-4 3.4 Final Stage. 2-4 3.5 Bi-Directional Coupler. 2-4 3.6 Antenna Switch. 2-5 3.7 Harmonic Filter. 2-5 3.8 Power Control.
2-5 4.0 Frequency Synthesis. 2-6 4.1 Reference Oscillator. 2-6 4.2 Fractional-N Synthesizer. 2-6 4.3 Voltage Controlled Oscillator (VCO). 2-8 4.4 Synthesizer Operation. 2-9 Section 3 Troubleshooting Charts 1.0 Troubleshooting Flow Chart for Receiver. 3-1 2.0 Troubleshooting Flow Chart for 40W Transmitter.
3-3 3.0 Troubleshooting Flow Chart for Synthesizer. 3-4 4.0 Troubleshooting Flow Chart for VCO. Ii Section 4 UHF PCB/Schematics/Parts Lists 1.0 Allocation of Schematics and Circuit Boards. 4-1 1.1 Controller Circuits. 4-1 2.0 UHF Band 2 25-40W PCB / Schematics / Parts List. 4-3 UHF Band 2 (450-520 MHz) 40W 8480645Z04 Top Side. 4-3 UHF Band 2 (450-520 MHz) 40W 8480645Z04 Bottom Side.
4-4 UHF Band 2 (450-520 MHz) Power Amplifier 40W. 4-5 UHF Band 2 (450-520 MHz) FRACN. 4-6 UHF Band 2 (450-520 MHz) Voltage Controlled Oscillator. 4-7 UHF Band 2 (450-520 MHz) Receiver Front End. 4-8 UHF Band 2 (450-520 MHz) IF.
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4-9 UHF Band 2 PCB 8480645Z04 Parts List 25-40W.