User's Manual

Alarms Testing – continued
PRELIMINARY
1X SCt4812ET Lite BTS Optimization/ATP
08/01/2001
3-88
in this test are for a frame configured for single carrier operation with
rectifiers installed in rectifier shelf positions 2, 3, and 4, from left to
right when facing the frame.
Table 3-52: Single Rectifier Fail or Minor Alarm, Single–Carrier System
Step Action
1
! CAUTION
Only perform this test if the rectifier current load displayed on the AMP indicator on the MAP is
125 amps or less. Sufficient current capability to support a greater load may not be available when
one rectifier is removed from the bus.
On the ACLC, set the RECT. 2/4 circuit breaker to OFF.
S The DC and PWR LEDs should light red on the rectifier in shelf position 2.
S The MINOR ALARM (amber) and RECTIFIER FAIL (red) LEDs on the MAP should light.
S The CDMA LMF should report an alarm condition as BTS Relay #21 and BTS Relay #24
contacts, respectively.
2 Set the RECT. 2/4 circuit breaker on the ACLC to ON.
S All alarm indications should clear on the rectifier, MAP, and CDMA LMF.
Multiple Rectifier Failure
(Three Rectifier System)
Table 3-53 gives instructions on testing multiple rectifier failure or major
alarm in a three (3) rectifier system (single–carrier system). Procedures
in this test are for a frame configured for single carrier operation with
rectifiers installed in rectifier shelf positions 2, 3, and 4, from left to
right when facing the frame.
Table 3-53: Multiple Rectifier Failure or Major Alarm, Single–Carrier System
Step Action
1
! CAUTION
Only perform this test if the rectifier current load displayed on the AMP indicator on the MAP is 65
amps or less. Sufficient current capability to support a greater load may not be available when two
rectifiers are removed from the bus.
On the ACLC, set the RECT. 1/3 circuit breaker to OFF.
S The DC and PWR LEDs should light red on the rectifiers in shelf positions 1 and 3.
S The MAJOR ALARM (red), MINOR ALARM (amber), and RECTIFIER FAIL (red) LEDs on the
MAP should light.
S The CDMA LMF should report an alarm condition as BTS Relay #21, BTS Relay #24, and BTS
Relay #29 contacts, respectively.
2 Set the RECT. 1/3 circuit breaker on the ACLC to ON.
S All alarm indications should clear on the rectifiers, MAP, and CDMA LMF.
3