Figure 3-3. Transceiver (Vhf) Block Diagram (Power And Control Omitted) - Motorola APX 3000 Detailed Service Manual
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Also See for APX 3000:
- Basic service manual (144 pages) ,
- User manual (104 pages) ,
- Manual (59 pages)
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3-4
GPS
Rev
Power
Detector
*
VHF
Figure 3-3. Transceiver (VHF) Block Diagram (Power and Control Omitted)
Log
Amp
Harmonic
Filter
Digital
RF Atten
coupler
15dB Step Attn
16.8MHz
TRIDENT IC
PRESCALAR
BUFFER
16.8MHz
BUFFER
LNA
VHF
Antenna Switch
FET
Driver
Amplifier
LOOP
RX VCO
FILTER
PRE
TX VCO
BUFFER
IF Filter
Mixer
Theory of Operation: Main Board
Indicates Sub-shield
*
TX
TX
BUFFER
TX LO
RX
RX SSI Data
Abacus
RX SSI Clock
RX SSI Frame Sync
2nd
LO
FGU
Transmitter
Receiver
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Troubleshooting
