System Description

500-Watt VHF Transmitter Table of Contents
425A, Rev. 0 ii
TABLE OF CONTENTS (continued)
5.7 Calibration of the Forward Output Power Level of the Transmitter...............5-5
5.8 Calibration of the Reflected Output Level of the Transmitter.......................5-5
5.9 2-Way Combiner Assembly ....................................................................5-6
5.10 Bandpass Filter Assemblies ..................................................................5-6
5.11 600-Watt High-Band VHF Amplifier Tray ................................................5-6
5.11.1 AGC Control Board .....................................................................5-6
5.11.2 Phase Shifter Board....................................................................5-7
5.11.3 VHF Filter/Amplifier Board...........................................................5-7
5.11.4 High-Band VHF Amplifier Board ...................................................5-7
5.11.5 Overdrive Protection Board .........................................................5-7
5.11.6 VHF High-Band Amplifier Board ...................................................5-7
5.11.7 4-Way Splitter Board..................................................................5-8
5.11.8 High-Band Amplifier Board..........................................................5-8
5.11.9 4-Way Combiner Board...............................................................5-8
5.11.10 Calibration of the Visual Plus Aural Output
Power and VSWR Cutback.........................................................5-8
5.12 Board Level Alignment Procedures ........................................................5-9
5.12.1 (Optional) 4.5-MHz Composite Input Kit .......................................5-9
5.12.2 Delay Equalizer Board...............................................................5-10
5.12.3 Composite 4.5-MHz Filter Board.................................................5-10
5.12.4 (Optional) 4.5-MHz Bandpass Filter Board...................................5-10
5.12.5 IF Carrier Oven Oscillator Board.................................................5-11
5.12.6 Sync Tip Clamp/Modulator Board ...............................................5-11
5.12.7 Aural IF Synthesizer Board, 4.5 MHz ..........................................5-13
5.12.8 ALC Board (Part 1 of 2).............................................................5-14
5.12.9 IF Phase Corrector Board ..........................................................5-15
5.12.10 ALC Board, NTSC (Part 2 of 2) .................................................5-15
5.12.11 Channel Oscillator Board, Dual Oven ........................................5-16
5.12.12 x4 Multiplier Board .................................................................5-16
5.12.13 VHF Filter/Mixer Board............................................................5-16
5.12.14 High-Band VHF Filter/Amplifier Board .......................................5-17
APPENDICES
APPENDIX A SYSTEM SPECIFICATIONS
APPENDIX B SAMPLE LOG REPORT SHEET
APPENDIX C ASSEMBLY DRAWINGS
APPENDIX D SUBASSEMBLY DRAWINGS