User's Manual

5-8
Figure 5-3 Troubleshooting DS1/E1 Radio XMT Alarms (Sheet 2 of 2)
LMW-1027
(Page 2 of 2)
10/27/99
TRANSMITTER
A STATUS
Transmit Power
ATPC High Power
ATPC Timeout
Sync Loss
PA Temperature
PA Power
XMT On Line
XMT Provisioning
Common Loss
LOSS OF XMT SIGNAL DETECTED AT OUTPUT OF PA. IF ANY OTHER
ALARMS ARE RED, GO TO 1. IF NOT GO TO 2.
1. IF OFF NORMAL ALARM IS LIT, CHECK 10.5 V SWITCH
ON POWER SUPPLY IS ON. IF NOT REMOVE/REPLACE PA MODULE.
2. MEASURE RF LEVEL AT RF MON CONNECTOR ON
XMTR MODULE. IF LEVEL IS LOW, GO TO 3. IF NOT, GO TO 4.
3. MEASURE FREQUENCY AT XTAL MON CONNECTOR ON XMTR
MODULE. IF FREQUENCY IS CORRECT, REMOVE/REPLACE XMTR
MODULE. IF NOT REMOVE/REPLACE XTAL OSCILLATOR SUBBOARD.
4. REMOVE/REPLACE I/O INTERFACE MODULE.
LOSS OF XMT SIGNAL DETECTED AT
OUTPUT OF XMTR. IF I/O COMMON
ALARM AND XMT SYNC LOSS ALARM ARE
RED, GO TO 1. IF NOT GO TO 2.
1. REMOVE/REPLACE I/O INTERFACE
MODULE.
2. MEASURE RF LEVEL AT RF MON
CONNECTOR
ON XMTR MODULE. IF LEVEL IS LOW,
GO TO 3. IF NOT, GO TO 4.
3. MEASURE FREQUENCY AT XTAL MON
CONNECTOR ON XMTR MODULE. IF
FREQUENCY IS CORRECT,
REMOVE/REPLACE XMTR MODULE.
IF NOT, REMOVE/REPLACE XTAL
OSCILLATOR SUBBOARD.
4. REMOVE/REPLACE I/O INTERFACE
MODULE.
IN PROTECTED SYSTEMS, INDICATES FAILURE IN
SYNCHRONIZATION BETWEEN I/O INTERFACE
MODULES. IF I/O INTERFACE MODULE IN-SERVICE
IS NOT ACTIVE ON ALARMED SIDE, FAILURE IS
BETWEEN A
AND B I/O INTERFACE MODULES. IF
I/O INTERFACE MODULE IN-SERVICE IS ACTIVE,
FAILURE IS BETWEEN REPEATER RACKS OF
SYNCHRONOUS REPEATER.
1. REPLACE A-SIDE I/O INTERFACE MODULE.
2. REPLACE B-SIDE I/O INTERFACE MODULE.