- This topic has 33 replies, 1 voice, and was last updated 16 years ago by ali qaiser.
22nd December 2005 at 05:15 #43429TagGuest
Any one know the details of Difference in TRX level of main & diversity means?
Thanks22nd December 2005 at 07:11 #43430joodGuest
for wich system GSM or UMTS?22nd December 2005 at 09:28 #43431DurbenGuest
TRX means that it’s 2G.
Try NED…22nd December 2005 at 12:22 #43432TagGuest
What i means is that if i c this alarm on my report,what does this alram means,izzit that my Rx main and Rx diversity has problem??22nd December 2005 at 13:30 #43433joodGuest
As i know ,as you get difference between them the better the estimated signal => (un correletion function).
the difference depends on the type of diversity, & the propagation environment.
#what alarm you see, in what vendor??22nd December 2005 at 15:39 #43434TagGuest
The alarm show this:
Difference in TRX level of main & diversity for TRX122nd December 2005 at 15:40 #43435MandyGuest
What does correletion means?24th December 2005 at 06:29 #43436joodGuest
Naturally they always have diff level, Cuz of diff propagation plane (space or polarization).
I don’t have experience on nokia.
BUT it may related to the antenna damage OR HW problem (may your duplexer or splitter is not ok) or it relate to sw.
But frankly I didn’t meet this alarm yet.27th December 2005 at 14:42 #43437PatrickGuest
This exist on
when you make a TRX loop test. Choose both separetly.
you have 2 results:
rx path 1= a
rx path 2= b
normally a=b, the alarm appear if a is different b, the difference is more over 4.
in the menu, you have comparaison RSSI value.
You can see the diffrence with a number.
In all that case, the problem can be from antenna, feeder, TRX, câble, …27th December 2005 at 15:11 #43438TagGuest
Thanks patrick !!!28th December 2005 at 06:10 #43439joodGuest
different 4, is it dB.
& is it constant for all diversity types in nokia.6th January 2006 at 14:45 #43440MichaelGuest
I have seen this alarm many times i Orange GSM network i Switzerland. It was always the MHA (Masthead Preamplifier) which caused the problem.6th January 2006 at 14:49 #43441TagGuest
Thanks for the advice,
IS this alram service affecting?9th January 2006 at 11:15 #43442PatrickGuest
I don’t know if it is db or dbm but in NED it is explain.
I forgot but it must be a internal TRX failure.
With this problem you can have: silence call, cut call, … Bad quality.9th January 2006 at 17:06 #43443TagGuest
However i thought this alram only tell us that the Rx path and the rx diversity path,have some difference in the receive level?