Figure 3-6. Receiver Block Diagram (Uhf2 And 700-800 Mhz) - Motorola APX 7000 Basic Service Manual

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Sec 1: 3-4
RMT Port
AUX
RMT Port
AUX
PER
SW
DPLXR
SP3T
2:1
To
RF/Vocon
Connector
Figure 3-5. Receiver Block Diagram (UHF1 and VHF)
PER
SW
DPLXR
SP3T
2:1
To
RF/Vocon
Connector
Figure 3-6. Receiver Block Diagram (UHF2 and 700–800 MHz)
Basic Theory of Operation: Analog Mode of Operation
UHF1
VHF
2nd
LO
700/800
UHF2
2nd
LO
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

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