Frequency Hopping Reduce interference.Synthesizer frequency Hopping(sfh) is suitible for big cities or where you face with low frequency beam width.it is suitble for configuration higher than 2 Trx per sector.most BTS equipments support BBH but maybe some BTS’s do’nt support SFH.In BSC AND MSC you must have software that support hopping and tune some parameters.
there is a lot of things that i do’nt know how i describe it for you.
good luck