No major degradation = no degradation at all ?
Only Qual HO are degraded ?
You know that when you enable frequency hopping, you must also tune your HO QUALITY threshold by “+1”.
Instead of 4, you should use 5.
In ALU system, it is done automatically : an offset “Offset_Hopping_HO” is added to both thresholds “L_RXQUAL_DL_H” & “L_RXQUAL_UL_H”
Maybe in your system, you should do it manually.
The TRX1800 are all hopping..? there is no BCCH in 1800 ? So that’s the inner zone of a multiband cell ? (trx900 = outer zone, trx1800 = inner zone ?)