User's Manual
28
68P80801H45-1 1/20/2002
800/900/1500 MHz Base Radios EBTS System Manual - Vol 2
Base Radio Overview
16.8MHz
2.4MHz
48MHz
Host SPI
Host SPI
16.8MHz
STATUS
PORT
RS-232
5 MHZ
EXTERNAL
REFERENCE
ETHERNET
1PPS & SLOT TIMING
RX1 DATA
RX2 DATA
RX3 DATA
RX4 DATA
Rx1&2
Rx3&4
POWER AMPLIFIER MODULE
Tx_I Tx_Q
EXCITER-BASE RADIO
CONTROLLER
HOST
u’P
SDRAM
RECEIVE
DSP
ETHERNET
EEPROM
FLASH
PLL/VCOs
TRANSMIT
DSP
TISIC
TX RECLOCK
BUFFERS
RX SPI
BASE RADIO
CONTROLLER
Exciter
IO LATCHES
RECEIVE
DSP
INTERFACE
ADDRESS DECODE,
MEMORY, ADC
SPI BUS
LINEAR
DRIVER
FINAL
LINEAR
AMPS
COMBINER
SPLITTER
RF OUT
TO RFDS
(TX ANTENNA)
DAC
VCOs/Synths
I
Q
ODCT
LINEAR RF
AMPLIFIER
RF IN
RF FEEDBACK
DC POWER SUPPLY MODULE
I
NPUT
F
ILTER
START-UP
INVERTER
CIRCUITRY
EXTERNAL
DC INPUT
41 - 60 VDC
CLOCK
GENERATOR
133 KHZ
267 KHZ
133 KHZ
14.2 V
CONVERTER
3.3 V
CONVERTER
+28 VDC
TO BACKPLANE
+14.2 VDC
TO BACKPLANE
+3.3 VDC
TO BACKPLANE
Main Converter
MIXER
IF FILTER
AMP, AGC
ABACUS
RECEIVER
IC
LPF, AMP,
FILTER
MIXER
IF FILTER
AMP, AGC
ABACUS
RECEIVER
IC
LPF, AMP,
FILTER
MIXER
IF FILTER
AMP, AGC
ABACUS
RECEIVER
IC
LPF, AMP,
FILTER
RX INTERFACE,
ADDRESS DECODE.
MEMORY, DIAGNOSTICS
PREAMPLIFIER
SPLITTER
/ BYPASS
VCO SYNTH
SPLITTER
RF IN
FROM RFDS
(BRANCH 2)
MIXER
IF FILTER
AMP, AGC
ABACUS
RECEIVER
IC
LPF, AMP,
FILTER
MIXER
IF FILTER
AMP, AGC
ABACUS
RECEIVER
IC
LPF, AMP,
FILTER
MIXER
IF FILTER
AMP, AGC
ABACUS
RECEIVER
IC
LPF, AMP,
FILTER
RX INTERFACE,
ADDRESS DECODE.
MEMORY, DIAGNOSTICS
PREAMPLIFIER
SPLITTER
/ BYPASS
VCO SYNTH
SPLITTER
RF IN
FROM RFDS
(BRANCH 3)
MIXER
IF FILTER
AMP, AGC
ABACUS
RECEIVER
IC
LPF, AMP,
FILTER
MIXER
IF FILTER
AMP, AGC
ABACUS
RECEIVER
IC
LPF, AMP,
FILTER
MIXER
IF FILTER
AMP, AGC
ABACUS
RECEIVER
IC
LPF, AMP,
FILTER
RX INTERFACE,
ADDRESS DECODE.
MEMORY, DIAGNOSTICS
PREAMPLIFIER
SPLITTER
/ BYPASS
VCO SYNTH
SPLITTER
RF IN
FROM RFDS
(BRANCH 1)
RECEIVER 2
RECEIVER 3
RECEIVER 4
RECEIVER 1
MIXER
IF FILTER
AMP, AGC
ABACUS
RECEIVER
IC
LPF, AMP,
FILTER
MIXER
IF FILTER
AMP, AGC
ABACUS
RECEIVER
IC
LPF, AMP,
FILTER
MIXER
IF FILTER
AMP, AGC
ABACUS
RECEIVER
IC
LPF, AMP,
FILTER
RX INTERFACE,
ADDRESS DECODE.
MEMORY, DIAGNOSTICS
PREAMPLIFIER
SPLITTER
/ BYPASS
VCO SYNTH
SPLITTER
SPI BUS
SPI BUS
SPI BUS
ADDRESS DECODE,
MEMORY, ADC
QUAD RX IN DISTRIBUTION
16.8MHz
Figure 6 800 and 900 MHZ QUAD Channel Base Radio Functional Block Diagram
RECEIVER 4