User Manual

BTS Redundancy/Alarm Testing – continued
3-96 1X SC4812T–MC BTS Optimization/ATP 5/21/04
DRAFT
Table 3-43: BBX Redundancy Alarms
Step Action
n WARNING
Any BBXs enabled will immediately key-up. Before enabling any BBX, always verify that the TX
output assigned to the BBX is terminated into a 50 W non-radiating RF load! Failure to do so could
result in serious personal injury and/or damage to the equipment.
1 Enable the primary, then the redundant BBX assigned to ANT 1 by selecting the BBX and
Device>BBX/MAWI>Key.
2 Observe that primary BBXs key up, and a carrier is present at each respective frequency.
3 Remove the primary BBX.
4 Observe a carrier is still present. The Redundant BBX is now the active BBX for Antenna 1.
5 Replace the primary BBX and reload the BBX with code and data.
6 Re-enable the primary BBX assigned to ANT 1 and observe that a carrier is present at each respective
frequency.
7 Remove the redundant BBX and observe a carrier is still present.
8 The Primary BBX is now the active BBX for ANT 1.
9 Replace the redundant BBX and reload the BBX with code and data.
10 Re-enable the redundant BBX assigned to ANT 1 and observe that a carrier is present at each
respective frequency:
11 De-key the Xcvr by selecting Device>BBX/MAWI>Dekey.
12 Repeat Steps 1 through 11 for additional BBXs/antennas, if equipped.
CSM, GPS, & HSO
Redundancy/Alarm Tests
Follow the procedure in Table 3-44 to verify the manual redundancy of
the CSM, GPS, and HSO boards. Verification of alarms reported is also
covered.
DO NOT perform the procedure in Table 3-44, unless the
site is configured with a HSO timebase as a backup for the
GPS.
NOTE
3