Datron PRC1099A - Power Knob Operation

2: System Overview
2-14 PRC1099A-MS
Figure 2-2 PRC1099A System Block Diagram
Whip
Antenna
50 Ohm
Antenna
Audio/Filter Board
Antenna Tuner Board
Tuning
Network
Detector
Low Pass
Filters
High Pass
Filter
VOGAD
TX
Balanced
Modulator
Product
Detector
Audio
Amp
Squelch
1650 kHz IF Board
AGC
RX AmpRX Amp
XTAL
Filter
TX Amp
RX Path
TX Path
Oscillator Path
Power
Amp
Power Amplifier
Board
Processor
Control
Processor Board
Microphone
Mixer Board
RX
Mixer
TX Amp
75 MHz
Filter
RX Amp
BAL.
Mixer
Filter
RX Amp
TX
Mixer
TX Amp
BFO
Synthesizer
Reference
Oscillator
Synthesizer Board
Audio/Filter Board
Speaker
or Handset
First LO
(76.6–105 MHz)
Second LO
(73.35 MHz)
ALC
ALC
(1650 kHz
1647 kHz)
Channel Frequency
(1.6 to 30 MHz)
T
X
R
X
TX
RX
TX
RX
TX
RX
(1650 kHz or 1647 kHz)
(1650 kHz or 1647 kHz)
AGC
(Dual sideband)
(Single sideband)