User's Manual

10 68P80801E35-B 5/1/2002
800/900/1500 MHz Base Radios EBTS System Manual - Vol 2
DC Power Supply
A/D
CONVERTER
COOLING
FAN
THERMISTOR
MOUNTED ON
HEATSINK
SPI BUS
REF
REF
REF
MOD FAIL
INPUT FAIL
HEATSINK DIAG
+5.1 V
+14.2V DIAG
+5.1 V DIAG
+28.6 V DIAG
REF
REF
HEATSINK STATUS
DETECT
HI-TEMP
DETECT
BULK DETECT
FROM STARTUP
INVERTER
CIRCUITRY
FROM
DETECT
CIRCUITRY
A
B
INPUT GOOD
(GREEN)
MODULE
FAIL
(RED)
3
SPI BUS
TO/FROM
STATION CONTROL
MODULE
ADDRESS DECODE CIRCUITRY
ADDRESS
DECODE
CIRCUITRY
FROM
STATION
CONTROL
BOARD
9
P/O ADDRESS BUS
ENABLE
ENABLE
DIAGNOSTICS CIRCUITRY
T°
EBTS324
012097JNM
J300
REF
Figure 4
DC Power Supply Functional Block Diagram (Sheet 2 of 2)