Table 3-1. Battery Connector J3; Figure 3-4. Transceiver (700/800 Mhz) Block Diagram (Power And Control Omitted) - Motorola APX 3000 Detailed Service Manual

Theory of Operation: Main Board
Digital
RF Atten
GPS
Rev
Power
Detector
*
800
LNA
700

Figure 3-4. Transceiver (700/800 MHz) Block Diagram (Power and Control Omitted)

3.1.1 Interconnections
This section describes the various interconnections for the main board.
3.1.1.1 Battery Connector M101
Battery connector M101 solders to the transceiver printed circuit board. The connector has 5 gold
plated contacts that mate with the battery, two contacts for positive, two for negative and one for the
Dig_Battery_Data. Signal descriptions are in
Pin No.
1
2
3
Log
Amp
Harmonic
Filter
coupler
15dB Step Attn
16.8MHz
TRIDENT IC
PRESCALAR
BUFFER
BUFFER
800
LNA
700

Table 3-1. Battery Connector J3

Signal
DC_BATT
Dig_Battery_Data
Ground
Antenna Switch
FET
VCO 1 (740-776 MHz)
LOOP
FILTER
VCO 2 (794-824 MHz)
VCO 3 (851-885 MHz)
PRE
BUFFER
IF Filter
Mixer
HPF
Table 3-1.
Description
Battery positive terminal, nominally 7.5 Vdc
Battery status, from battery to controller
Battery negative terminal, tied to PCB ground
Indicates Sub-shield
Driver
Amplifier
*
TX
TX
BUFFER
TX LO
RX
RX LO
RX SSI Data
Abacus
RX SSI Frame Sync
2nd
LO
3-5
FGU
Transmitter
Receiver
RX SSI Clock