Motorola MTR2000 T5544 Instruction / Field Service Manual page 57

Description
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/DC POWER SUPPLY with DC Backup Connector
AC TRANSFORMER
INPUT and PFC
REGULATOR
CIRCUITRY
DC
INPUT
Figure 3. MTR2000 Station Functional Block Di-
agram (Sheet 1 of 2)
14
68P81096E36-H
06/28/05
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 BUS
HOST DATA BUS
SPI BUS
EIA-232
HOST
INTERFACE MICROPROCESSOR
68356
+14.2 VDC
+5.1 VDC
+28.6 VDC
(HIGH POWER
DSP
PA ONLY)
DSP DATA BUS
24 KHz CODEC BUS
SSI
WIRELINE INTERFACE BOARD
(4-WIRE VERSION SHOWN)
LINE 1 IN
INBOUND
WIRELINE AUDIO
FROM
LANDLINE
TO
STATION
PCM CODEC BUS
(8 KHz PCM)
DIFFERENTIAL DATA
2.1 MHz REF
2.1 MHz
REFERENCE
OSCILLATOR
HOST
MEMORY
CURRENT-TO-
VOLTAGE
CONVERTER
PROCESSING/
INTERFACE
PCM CODEC BUS
DSP ADDRESS BUS
CIRCUITRY
DSP
ASIC
20 KHz CODEC BUS
24 KHz CODEC BUS
DSP
RSSI DATA
MEMORY
CIRCUITRY
(OPTION DEPENDENT)
LINE 2 OUT
WIRELINE AUDIO
LINE LINE
RX TX
CODEC #3
AUXILIARY I / O BOARD
GENERAL
PURPOSE INPUTS
INPUT OUTPUT
FROM
BUFFERS LATCHES
AUXILIARY
EQUIPMENT
2.1 MHz REF
A
VCO & REF MOD AUDIO
SPI BUS
SPI BUS
B
SPI BUS
EXTERNAL SPEAKER
MICROPHONE AUDIO
DISC AUDIO
AUDIO
AUXILIARY TX AUDIO
TRUNKING AUDIO
MRTI AUDIO
RSSI RECEIVER SIGNAL
STRENGTH INDICATOR
OUTBOUND
FROM
STATION
TO
LANDLINE
GENERAL
PURPOSE
OUTPUTS TO
AUXILIARY
EQUIPMENT