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Section 12: i
Section 12: UHF Band 1 (403–470 MHz) 25–40 W LDMOS
Service Information
Model Charts and Technical Specifications
1.0 UHF Band 1 (403–470 MHz) 25–40 W LDMOS Model Charts.......................12:1-1
1.1 CDM Series Model Chart ..........................................................................12:1-1
1.2 PRO Series Model Chart...........................................................................12:1-2
Theory of Operation
2.1 Receiver Front-End ...................................................................................12:2-1
2.2 Front-End Bandpass Filters and Pre-Amplifier..........................................12:2-2
2.3 First Mixer and High Intermediate Frequency (IF).....................................12:2-2
2.4 Low Intermediate Frequency (IF) and Receiver Back-End .......................12:2-3
3.0 UHF Band 1 (403–470 MHz) 25–40 W LDMOS Transmitter Power Amplifier
3.1 First Power Controlled Stage ....................................................................12:2-4
3.2 Power Controlled Driver Stage..................................................................12:2-4
3.3 Final Stage ................................................................................................12:2-4
3.4 Directional Coupler....................................................................................12:2-4
3.5 Antenna Switch .........................................................................................12:2-4
3.6 Harmonic Filter ..........................................................................................12:2-5
3.7 Power Control............................................................................................12:2-5
4.0 UHF Band 1 (403–470 MHz) 25–40 W LDMOS Frequency Synthesis ..........12:2-5
4.1 Reference Oscillator..................................................................................12:2-6
4.2 Fractional-N Synthesizer ...........................................................................12:2-6
4.3 Voltage Controlled Oscillator (VCO)..........................................................12:2-7
4.4 Synthesizer Operation...............................................................................12:2-8
Troubleshooting Charts
1.0 Troubleshooting Flow Chart for Receiver .......................................................12:3-1
2.0 Troubleshooting Flow Chart for 40 W Transmitter..........................................12:3-3
3.0 Troubleshooting Flow Chart for Synthesizer...................................................12:3-5
4.0 Troubleshooting Flow Chart for VCO..............................................................12:3-6
5.0 Troubleshooting Flow Chart for PassPort.......................................................12:3-7
Summary of Contents for PRO Series
Page 1: ...CDM Series and PRO Series Two Way Mobile Radios Detailed Service Manual 6881091C63 F ...
Page 4: ...Notes ...
Page 6: ...Notes ...
Page 8: ...Section 1 ii 6881091C63 F Notes ...
Page 12: ...Section 1 1 4 Radio Model Information 6881091C63 F Notes ...
Page 22: ...Section 1 2 10 Notes For All Schematics and Circuit Boards 6881091C63 F Notes ...
Page 46: ...Section 2 4 2 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Page 78: ...Section 3 1 20 Controller Board Audio and Signaling Circuits Section 6881091C63 F Notes ...
Page 80: ...Section 3 2 2 Troubleshooting Flow Chart for Controller 6881091C63 F Notes ...
Page 84: ...Section 3 3 4 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Page 146: ...Section 3 3 66 Controller T6 T7 Schematics and Parts Lists 8471235L06 Notes 6881091C63 F ...
Page 152: ...Section 4 1 4 Technical Specifications 6881091C63 F Notes ...
Page 168: ...Section 4 3 8 Troubleshooting Flow Chart for VCO 6881091C63 F Notes ...
Page 172: ...Section 4 4 4 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Page 232: ...Section 5 1 4 Technical Specifications 6881091C63 F Notes ...
Page 242: ...Section 5 2 10 UHF Band 1 403 470 MHz 1 25 W Frequency Synthesis 6881091C63 F Notes ...
Page 296: ...Section 6 1 4 Technical Specifications 6881091C63 F Notes ...
Page 306: ...Section 6 2 10 UHF Band 2 450 512 527 MHz 1 25 W Frequency Synthesis 6881091C63 F Notes ...
Page 316: ...Section 6 4 2 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Page 352: ...Section 7 3 6 Troubleshooting Flow Chart for VCO 6881091C63 F Notes ...
Page 356: ...Section 7 4 4 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Page 458: ...Section 8 1 4 Technical Specifications Section 6881091C63 F Notes ...
Page 474: ...Section 8 4 2 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Page 496: ...Section 9 1 4 Technical Specifications Section 6881091C63 F Notes ...
Page 512: ...Section 9 4 2 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Page 530: ...Section 10 1 4 Technical Specifications Section 6881091C63 F Notes ...
Page 546: ...Section 10 4 2 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Page 564: ...Section 11 1 4 Technical Specifications 6881091C63 F Notes ...
Page 580: ...Section 11 3 8 Troubleshooting Flow Chart for VCO 6881091C63 F Notes ...
Page 582: ...Section 11 4 2 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Page 608: ...Section 12 1 4 Technical Specifications 6881091C63 F Notes ...
Page 624: ...Section 12 3 8 Troubleshooting Flow Chart for PassPort 6881091C63 F Notes ...
Page 626: ...Section 12 4 2 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Page 654: ...Section 13 1 4 Technical Specifications 6881091C63 F Notes ...
Page 672: ...Section 13 4 2 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...