Figure 3-7. Receiver Block Diagram (Uhf2 And 700-800 Mhz); Figure 3-8. Receiver Block Diagram (Uhf2 And Vhf) - ASTRO APX 7000 Basic Service Manual

Basic Theory of Operation: Analog Mode of Operation
RMT Port
AUX
RMT Port
AUX
PER SW
DPLXR
SP3T 2:1
To
RF/Vocon
Connector
Figure 3-7. Receiver Block Diagram (UHF2 and 700–800 MHz)
PER SW
DPLXR
SP3T 2:1
To
RF/Vocon
Connector

Figure 3-8. Receiver Block Diagram (UHF2 and VHF)

700/800
UHF2
2nd
LO
UHF2
VHF
2nd
LO
Sec 1: 3-5
SW
2:1
SSI
ΣΔ ADC Dec.
Filter
18Mhz
LO CLK
CLK
Abacus III
SW
2:1
SSI
ΣΔ ADC Dec.
Filter
18Mhz
LO CLK
CLK
Abacus III