pwrc is used to remove the samples of DL RXLEV measured while the TS is hpoping on the BCCH frequency.
This is only useful if cell is BBH.
the ms is on trx3, ts2.
there are 3 trx in the cell.
the cell is hopping on 3 frequencies (that’s bbh !)
everytime the trx3/ts2 is hopping on frequency 1 (rather than f2 or f3), then the rxlev is high (becauser there is no dl pc on the DL for the f1)
to avoid getting a crazy average (f1 good, f2 and f3 low because of dl pc), then you should use PWRC.