Figure 3-6. Transceiver (Uhf1 / Uhf2) Block Diagram (Power And Control Omitted); Figure 3-7. Transceiver (Uhf2 / 7/800) Block Diagram (Power And Control Omitted) - Motorola APX 7000 Detailed Service Manual

Theory of Operation: Transceiver Board
Main antenna
Aux port
SP2T
Aux

Figure 3-6. Transceiver (UHF1 / UHF2) Block Diagram (Power and Control Omitted)

Main antenna
Aux port
SP2T
Aux

Figure 3-7. Transceiver (UHF2 / 7/800) Block Diagram (Power and Control Omitted)

Log
Amp
SP3T Rf Switch
Digital
RF Atten
SP3T
GPS Di-
coupler
Plexer
Rev
Power
Detector
ND
2 HARMONIC FILTER
*
16.8MHz
TRIDENT IC
LOGIC PRESCALAR
EXPANDER
BUFFER
16.8MHz
BUFFER
UHF1
UHF2
Log
Amp
SP3T Rf Switch
Digital
RF Atten
SP3T
GPS Di-
coupler
Plexer
Rev
Power
Detector
ND
2 HARMONIC FILTER
*
÷ 2
16.8MHz
TRIDENT IC
PRESCALAR
LOGIC
EXPANDER
BUFFER
16.8MHz
BUFFER
7/800
UHF2
Switch
FET
UHF2
Harmonic Driver
Filters Amplifier
FET
UHF1
LOOP
UHF2 TX
FILTER
UHF1 TX
UHF1/UHF2 RX
PRE
BUFFER
RX LO
mixer
Switch
FET
UHF2
Harmonic Driver
Filters Amplifier
FET
7/800
LOOP
FILTER
7/800/UHF2 TX
7/800/UHF2 RX
PRE
BUFFER
RX LO
mixer
FGU
Transmitter
Receiver
Indicates Sub-shield
*
TX
BUFFER
TX LO
RX SSI Data
Abacus RX SSI Clock
RX SSI Frame Sync
2nd
LO
FGU
Transmitter
Receiver
Indicates Sub-shield
*
TX
BUFFER
TX LO
RX SSI Data
Abacus
RX SSI Clock
RX SSI Frame Sync
2nd
LO
3-5