trx quality problem

ok mania :
so you what you suggest is:
1-swap trxs if still a problem then
2-swap combiner if still a problem then
3-verify antenna system if still a problem then
4-verify antenna orientation

Thanks,
and can you tell me about TRX 1 and TRX 2 as well ?

(i need to know how much traffic they are handling)

case 1
if they also take traffic but all is fine for them, then :
a) ANC problem : but here, path balance is good, so I don’t think so.
b) TRX swap : the TRX 3 and 4 are probably connected to the wrong ANC. Check if other TRX in the BTS are also having poor efficiency (but if they don’t carry traffic, you won’t get a proper eficiency evaluation)

case 2
if they do not take traffic :
lock TRX 3 and TRX 4, wait tomorrow to see if they take traffic, and what’s their efficiency and Path Bal.

IMO, it is a case of TRX swap. TRX1 and TRX2 are connected to one ANC, while TRX3 and TRX4 are connected to the ANC of another sector.

Because of sector coverage overlap, it is not always easy to detect…
Check the avg DL RXLEV and the avg Time Advance, for each of the 4 tRX of that cell. Are they identical, or not ?

Cheers
pix

hi Campus,

ok then you have your answers from Mania… I can’t see anything more from your indicators that would indicate another problem.
either TRX swap or ANC failed or antenna problem (rare 🙂 )

let us know how it turns out,
pix