User's Manual

5-7
Figure 5-3 Troubleshooting DS1/E1 Radio XMT Alarms (Sheet 1 of 2)
TRANSMITTER
XMT OnLine
STATUS
A
XMT Provisioning
Common Loss
PA Temperature
PA Power
Transmit Power
ATPC High Power
ATPC Timeout
Sync Loss
LMW-1027-sm
(Page 1 of 2)
05/17/03
SILENT FAILURE (NO ALARM ACTIVATED) AT TRANSMITTER. THE COMMON LOSS ALARM, GENERATED BY
THE AE-37Y CONTROLLER, TRIGGERS WHEN BOTH A SIDE AND B SIDE DOWNSTREAM RECEIVERS HAVE A
RADIO FRAME LOSS OR CHANNEL FAILURE. IN A HOT-STANDBY HOP, LOSS OF BOTH RECEIVERS INITIATES
A REQUEST TO SWITCH TO STANDBY TRANSMITTER, EVEN THOUGH NO TRANSMIT ALARMS ARE PRESENT.
IF THE PATH IS NOMINAL, THE TRANSMITTER SWITCHES IN 5 SECONDS. IF THE PATH IS IN A FADE (APC IS IN
ACTIVE RANGE), THE TRANSMITTER SWITCHES IN 30 SECONDS. IF THE DOWNSTREAM ALARMS CLEAR
WITHIN 5 SECONDS, A CLA IS INITIATED ON THE OFF-LINE SIDE TO INDICATE A SILENT TRANSMIT FAILURE.
IF ALARMS STILL EXIST, THE TRANSMITTER CONTINUES TO SWITCH EVERY 30 SECONDS. THIS PROCESS
CONTINUES UNTIL THE RECEIVE ALARMS CLEAR, BUT NO CLA IS ACTIVATED.
PA TEMPERATURE LIMITS
EXCEEDED. CHECK
MOUNTING SCREWS.
ATPC HAS BEEN ACTIVE
FOR 5 MINUTES WITHOUT
RETURNING TO NORMAL
(DROPS BACK TO LOW
POWER ONLY IF ATPC
HAS BEEN ENABLED WITH
TIMEOUT).
In order to clear a CLA, it must be acknowledged locally
(at radio indicating alarm) using front panel control on
controller module.
Note