Frequency Issue in IBS

[070057r]

Dear Experts,

we have a serious issue in our 2G IBS. Whatever ever the frequency we used the adjacent frequencies are amplified too. Can someone experience such incident or know the issue reply please. we are using 529 as BCCH and 536 as TCH. We changed the hardware and check the RRU output directly from the antenna without connecting to DAS. but issue exists still

Frequncy List.jpg