User's Manual Part 3

BTS Redundancy/Alarm Testing – continued
Mar 2001
3-91
68P09253A61
SCt4812T CDMA BTS Optimization/ATP
DRAFT
BBX Redundancy
Follow the steps in Table 3-49 to verify redundancy of the BBXs in the
C–CCP shelf. Alarms reported by the master GLI (displayed via the
alarm monitor) are also verified. This test can be repeated for additional
sectors at the customer’s discretion.
Table 3-49: 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>Key Xcvr.
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>Dekey Xcvr.
12 Repeat Steps 1 through 11 for additional BBXs/antennas, if equipped.
3