i am facing a unusual problem in a site BTS is 2964,configuration is 6+4+6.1.5 yrs before i faced a rx diversity problem and i cleared that one,again today i am facing RX path imbalance fault code is 2A:57 i have checked VSWR,connectors and DRU’s still problem persist.i swapped that antenna and feeder cable with another cabinet now problem shifted to another cabinet.we are using 1800Mhz Band