Motorola MTR2000 T5544 Instruction / Field Service Manual page 287

RECEIVE
ANTENNA
RECEIVER MODULE
RF INPUT/OUTPUT
CONNECTOR BRACKET
(REAR OF STATION)
LOW PASS FILTER/
PRESELECTOR/
IMAGE FILTER
RSS TERMINAL
(IBM-PC LAPTOP
TYPICAL)
POWER SUPPLY MODULE
AC POWER SUPPLY with DC REVERT
AC
REGULATOR
TRANSFORMER
INPUT
CIRCUITRY
1ST
CUSTOM
MIXER
RECEIVER
1ST I-F IC
BANDPASS
FILTERING
(2ND INJECTION,
AMPLIFICATION,
A/D CONVERSION)
1ST LO INPUT
SPI BUS
SYNTHESIZER/
VCO
2.1 MHz REF
STATION CONTROL MODULE
HOST ADDRESS
HOST DATA BUS
SPI BUS
EIA-232 HOST
INTERFACE MICROPROCESSOR
68356
DSP
+14.2 VDC
+5.1 VDC
24 KHz CODEC BUS
SSI
DIFFERENTIAL DATA
PCM CODEC BUS
2.1 MHz REF
HOST
MEMORY
CURRENT-TO-
VOLTAGE
CONVERTER
PCM CODEC BUS
DSP ADDRESS BUS
DSP
DSP DATA BUS
ASIC
20 KHz CODEC BUS
24 KHz CODEC BUS
DSP
RSSI DATA
MEMORY
WIRELINE INTERFACE BOARD
(4-WIRE VERSION SHOWN)
LINE 1 IN
INBOUND
WIRELINE AUDIO
FROM LINE
LANDLINE
RX
TO
STATION
CODEC #3
(8 KHz PCM)
AUXILIARY I / O BOARD
GENERAL
PURPOSE
INPUT
INPUTS FROM
BUFFERS
AUXILIARY
EQUIPMENT
2.1 MHz
REFERENCE
OSCILLATOR
SPI BUS
SPI BUS
SPI BUS
EXTERNAL SPEAKER
MICROPHONE AUDIO
DISC AUDIO
AUDIO
PROCESSING/
AUXILIARY TX AUDIO
INTERFACE
CIRCUITRY
TRUNKING AUDIO
MRTI AUDIO
RSSI RECEIVER SIGNAL
CIRCUITRY STRENGTH INDICATOR
(OPTION DEPENDENT)
68P81096E44-E
09/30/05
Satellite/Second Receiver
LINE 2 OUT
OUTBOUND
WIRELINE AUDIO
LINE FROM
STATION
TX
TO
LANDLINE
GENERAL
PURPOSE
OUTPUT
OUTPUTS TO
LATCHES
AUXILIARY
EQUIPMENT
Figure 5. MTR2000 Satellite Receiver
Functional Block Diagram
5