Table 3-1. Battery Connector J3; Figure 3-6. Transceiver (900 Mhz) Block Diagram (Power And Control Omitted) - Motorola APX 1000 Detailed Service Manual

Theory of Operation: Main Board
GPS
Rev
Power
Detector
*
LNA
900

Figure 3-6. Transceiver (900 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
Digital
RF Atten
coupler
15dB Step Attn
16.8MHz
TRIDENT IC
PRESCALAR
BUFFER
16.8MHz
BUFFER
LNA
900

Table 3-1. Battery Connector J3

Signal
DC_BATT
Dig_Battery_Data
Ground
Antenna Switch
FET
LOOP
RX VCO
FILTER
PRE
TX VCO
BUFFER
IF Filter
Mixer
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 SSI Data
Abacus
RX SSI Frame Sync
2nd
LO
3-7
FGU
Transmitter
Receiver
RX SSI Clock