Motorola APX 7000 - Identifying Radio Controls; Keypad

3-10 Theory of Operation: Transceiver Board
Figure 3-10. Receiver Block Diagram (UHF1 / 7/800)
Figure 3-11. Receiver Block Diagram (UHF1 / VHF)
SW
2:1
700/800
UHF1
Abacus III
2nd
LO
18Mhz
CLK
CLK
Dec.
Filter
LO
ADC ΣΔ
SW
2:1
PER
SP3T
AUX
DPLXR
To
RF/Vocon
Connector
GPS
SSI
SW
2:1
UHF1
VHF
Abacus III
2nd
LO
18Mhz
CLK
CLK
Dec.
Filter
LO
ADC ΣΔ
SW
2:1
PER
SP3T
AUX
DPLXR
To
RF/Vocon
Connector
GPS
SSI