User's Manual

Alarms Testing – continued

08/01/2001

3-87

1X SCt4812ET Lite BTS Optimization/ATP

PRELIMINARY

AC Fail Alarm

Table 3-50 gives instructions on testing the AC Fail Alarm.

Table 3-50: AC Fail Alarm

Step Action

* IMPORTANT

S Back–up batteries must be installed when performing this test.

S To prevent inadvertently shutting down the RF compartment electronics, the batteries should be

charged before performing this test.

Set the ACLC MAIN circuit breaker to OFF.

S The CDMA LMF should report an alarm for an AC Fail condition as BTS Relay #21, BTS Relay

#23, BTS Relay #24, and BTS Relay #29 contacts, respectively.

S On the MAP, the MAJOR ALARM (red), MINOR ALARM (amber), and RECTIFIER FAIL (red)

LEDs should light.

S On the rectifiers, the DC and PWR LEDs should light red.

2 Set the ACLC MAIN circuit breaker to ON.

S On the CDMA LMF, the AC Fail alarm should clear.

S On the MAP, the MAJOR ALARM, MINOR ALARM, and RECTIFIER FAIL LEDs should

extinguish.

S On the rectifiers, the DC and PWR LEDs should change to green.

Minor Alarm

Table 3-51 gives instructions on performing a test to display a minor

alarm.

Table 3-51: Minor Alarm

Step Action

1 Set the TCP switch on the MAP to OFF. This will generate a minor alarm.

S The CDMA LMF should report the minor alarm as BTS Relay #24 contacts.

S The TC DISABLE (red) and MINOR ALARM (amber) LEDs on the MAP should light.

2 Set the TCP switch to ON. The alarm condition indications should clear.

Rectifier Alarms

The following series of tests are for single rectifier modules in a multiple

rectifier system. The systems include a three rectifier and a four rectifier

system.

Single Rectifier Failure

(Three Rectifier System)

Table 3-52 gives instructions on testing single rectifier failure or minor

alarm in a three (3) rectifier system (single–carrier system). Procedures