Analog Mode Of Operation; Figure 3-1. Apx 5000/ Apx 6000/ Apx 6000Li Overall Block Diagram - Motorola APX 5000 Service Manual

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Figure 3-1. APX 5000/ APX 6000/ APX 6000Li Overall Block Diagram

3.2

Analog Mode of Operation

This section provides an overview of the analog mode receive and transmit theory of operation.
3.2.1 Receiving
The RF signal is received at the antenna and is routed through the Auxiliary and Multi Switch (SP3T) ICs
the UHF1, UHF2 and 7/800MHz designs. The latter contains a switchable attenuator that is enabled at
predetermined RF power thresholds present at the antenna port. The VHF design does not include the
Auxiliary switch and thus RF is routed directly to the SP3T switch
Antenna
40
Transceiver
Board
Basic Theory of Operation: Analog Mode of Operation
Bluetooth
Antenna
16
Expansion
Board
80
22
20
VOCON
Board
50 20
30
.
See Figure
External Accessory Connector
External Antenna
Front Display
Keypad
Top Display
Controls Top
.
3-2and Figure 3-5
on