User's Manual

Table Of Contents
BTS Redundancy/Alarm Testing
68P09255A61-4
Aug 2002
1X SC 4812T BTS Optimization/ATP Software Release 2.16.1.x
FIELD TRIAL
3-96
Table 3-51: BBX Redundancy Alarms
Step Action
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, & LFR/HSO Redundancy/Alarm Tests
Follow the procedure in Table 3-52 to verify the manual redundancy of
the CSM, GPS, and LFR/HSO boards. Verification of alarms reported is
also covered.
NOTE
DO NOT perform the procedure in Table 3-52, unless the site is
configured with a LORAN-C or HSO timebase as a backup for
the GPS.
Table 3-52: CSM, GPS, & LFR/HSO, Redundancy/Alarm Tests
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 BBXs assigned to ANT 1 by selecting the BBX and
Device>BBX/MAWI>Key.
2 Disconnect the GPS antenna cable, located on top of the BTS frame (see Figure 3-26).
This forces the LORAN-C LFR or HSO board timebase to become the CDMA timing source.
3 Observe a CDMA timing reference alarm and source change is reported by the alarm monitor.
4 Allow the LFR/HSO to become the active timing source.
Verify the BBXs remain keyed and INS.
Verify no other modules went OOS due to the transfer to LFR/HSO reference.
Observe the PWR/ALM LEDs on the CSM 1 front panel are steady GREEN.
5 Reconnect the GPS antenna cable.
6 Allow the GPS to become the active timing source.
Verify the BBXs remain keyed and INS.
Verify no other modules went OOS due to the transfer back to the GPS reference.
Observe the PWR/ALM LEDs on CSM 1 are steady GREEN.
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