Figure 3-3. Transceiver (Uhf1 And Uhf2) Block Diagram (Power And Control Omitted); Figure 3-4. Transceiver (7/800) Block Diagram (Power And Control Omitted) - Motorola APX 5000 Service Manual

3-4
SP2T
Aux
GPS GPS

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

SP2T
Aux
GPS
700
800

Figure 3-4. Transceiver (7/800) Block Diagram (Power and Control Omitted)

Log
Amp
SP3T Rf Switch
Digital
RF Atten
SP3T
Atten
coupler
Rev
Power
Detector
*
16.8MHz
TRIDENT IC
LOGIC PRESCALAR
EXPANDER
BUFFER
16.8MHz
BUFFER
UHF LNA
Log
Amp
SP3T Rf Switch
Digital
RF Atten
SP3T
Atten
coupler
Rev
Power
Detector
*
16.8MHz
TRIDENT IC
LOGIC PRESCALAR
EXPANDER
BUFFER
16.8MHz
BUFFER
7/800 LNA1
LNA2
Theory of Operation: Transceiver Board
FET
UHF
Driver
Amplifier
Harmonic
Filter
LOOP
UHF TX
FILTER
UHF RX
PRE
BUFFER
RX LO
Mixer
FET
7/800
Driver
Amplifier
Harmonic
Filter
LOOP
7/800 TX
FILTER
7/800 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