User Manual

ADCP-75-192 • Issue 1 • December 2005 • Section 6: Autonomous Software Functionality
Page 6-4
 2005, ADC Telecommunications, Inc.
8 PA OVERPOWER PROTECTION
PA Overpower Protection (POP) is a software function that prevents damage to the PA as well
as preventing the PA from exceeding FCC spurious output limits.
POP measures the PA Output Power once per second from the RUC/PA MIB. If the PA
Output Power exceeds a determined threshold, then POP will deactivate the FGC process for
the tenant-sector in question, add attenuation to the RUC, and set a fault in the FGC MIB.
Once the PA Output Power returns to a value that is less than a determined threshold, then the
POP fault will be cleared and normal operation will resume.
The limits are set to 1 dB above the rated output for a given Power Amplifier. For 10 watt PAs
(40 dBm), the limit is 41 dBm. For 20 watt PAs (43 dBm), the limit is 44 dBm.
See the “SNMP Agent and Fault Isolation Guide” guide for details.
9 HUB OVERPOWER PROTECTION
Hub Overpower Protection (HOP) is a software function to control the output levels of the
FSC. HOP periodically measures the FSC output power. If the power exceeds a target level (-
3.5 dBFS), HOP will decrease the FSC output gain until the power level is below the allowable
threshold. HOP will continue to monitor the FSC Output Power until the level drops
sufficiently to allow the gain level to be returned to normal.
If HOP is required to take autonomous action on any of the FSC output, a HOP Status field in
the FSC MIB will be set such that the NMS report the condition and an operator can take
corrective action. This MIB entry can be found as follows:
transceptFscHopTable.transceptFscHopModeRms
Status values include hopActive and hopInactive. See the “SNMP Agent and Fault Isolation
Guide” guide for details.