combined o/p of TRX is fluctuating This topic has 5 replies, 1 voice, and was last updated 10 years, 6 months ago by amit. Viewing 6 posts - 1 through 6 (of 6 total) Author Posts 25th May 2012 at 05:08 #68262 AmitGuest Hi Guys, Urgent help required. In a IBS site RBS 2111v2 is running. from past 4-5 days we have observed that combined output signal of 2 RRUs are fluctuating alot(tested by directly connecting an antenna to rru o/p). signal is fluctuating from -12 to -30 while making calls. when 1 rru is kept in local mode. signal is stable, same in reverse versa. Uncombined output of both RRUs are OK. We have found no E1 slip errors. TCH drop is increased alot.. Pls suggest.. Thanks in advance 25th May 2012 at 05:11 #68263 AmitGuest Its a single sector 4 TRX site amit/- 25th May 2012 at 05:42 #68264 BijoyGuest Hi Amit Replace the combiner/duplexer & check. Br\\ Bijoy 25th May 2012 at 07:33 #68265 AmitGuest we have swapped combiner/duplexers, rru, mu, Jumpers. Same complete hardware works fine when b sector CDD loaded and tested for 4 trx config. 25th May 2012 at 08:33 #68266 BijoyGuest Hi Pls replace the antenna & check. Br\\ Bijoy 25th May 2012 at 09:15 #68267 amitGuest Dear Bijoy, Thanks for your prompt reply… Same harwares are working fine when B sector is loaded.. Note : all hardwares are replaced. problem is occuring only in A sector.. issue occuring only when two RRUs output is combined.. Both RRU are working fine in Uncombined Mode. rgds Amit Author Posts Viewing 6 posts - 1 through 6 (of 6 total) The forum ‘Telecom Design’ is closed to new topics and replies.