Theory of Operation:
Transceiver Board
3-15
Figure 3-15. Transmitter Block Diagram (VHF / 7/800)
Figure 3-16. Transmitter Block Diagram (UHF1 / 7/800)
To Antenna
To RMT Port
To RX
Log amp Power Detector
Digital RF Attenuator
FET 700/800
Driver Amplifier
FET VHF
VCO Module
VCO Module
VCO Module
Trident IC
SP3T RF Switch
Switch
TX SSI from Vocon
TX Buffer Amp
RF Switch
Harmonic Filters
Loop Filter
Ref. Oscillator
Coupler
Rev Power Detection
RF Switch Matrix
SP2T RF Switch
To Antenna
To RMT Port
To RX
Log amp Power Detector
Digital RF Attenuator
FET 700/800
Driver Amplifier
FET UHF1
VCO Module
VCO Module
VCO Module
Trident IC
SP3T RF Switch
Switch
TX SSI from Vocon
TX Buffer Amp
RF Switch
Harmonic Filters
Loop Filter
Ref. Oscillator
Coupler
Rev Power Detection
RF Switch Matrix
SP2T RF Switch
VCO Module
Summary of Contents for ASTRO APX 7000
Page 1: ......
Page 4: ...iv Document History Notes ...
Page 24: ...2 4 Radio Power DC Power Routing VOCON Board Notes ...
Page 98: ...3 74 Theory of Operation Global Positioning System GPS ...
Page 163: ...Troubleshooting Charts PA Failure 5 59 ...
Page 164: ...5 60 Troubleshooting Charts PA Failure ...
Page 276: ...7 58 Troubleshooting Tables List of Board and IC Signals Notes ...
Page 318: ...8 42 Schematics Boards Overlays and Parts Lists Transceiver RF Boards VHF 700 800 Notes ...
Page 380: ...8 104 Schematics Boards Overlays and Parts Lists Transceiver RF Boards UHF1 700 800 MHz Notes ...
Page 432: ...8 156 Schematics Boards Overlays and Parts Lists Transceiver RF Boards UHF1 VHF Notes ...
Page 458: ...8 182 Schematics Boards Overlays and Parts Lists Transceiver RF Boards UHF1 UHF2 Notes ...
Page 498: ...8 222 Schematics Boards Overlays and Parts Lists Transceiver RF Boards UHF2 700 800 MHz Notes ...
Page 546: ...8 270 Schematics Boards Overlays and Parts Lists Transceiver RF Boards UHF2 VHF Notes ...
Page 606: ...8 330 Schematics Boards Overlays and Parts Lists VOCON Boards Notes ...
Page 638: ...Glossary 10 Glossary Notes ...
Page 643: ......