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Difference in TRX level of main & diver

Viewing 15 posts - 1 through 15 (of 34 total)
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  • #43429 Reply
    Tag
    Guest

    Hi Guys,

    Any one know the details of Difference in TRX level of main & diversity means?

    Thanks

    #43430 Reply
    jood
    Guest

    for wich system GSM or UMTS?

    #43431 Reply
    Durben
    Guest

    Duhhh,

    TRX means that it’s 2G.

    Try NED…

    #43432 Reply
    Tag
    Guest

    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??

    #43433 Reply
    jood
    Guest

    Hi
    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??

    #43434 Reply
    Tag
    Guest

    Hi jood,

    Nokia BTS,

    The alarm show this:

    Difference in TRX level of main & diversity for TRX1

    #43435 Reply
    Mandy
    Guest

    Hi guys,

    What does correletion means?

    #43436 Reply
    jood
    Guest

    hi
    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.

    #43437 Reply
    Patrick
    Guest

    This exist on

    CITYTALK

    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.

    ULTRA SITE

    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, …

    #43438 Reply
    Tag
    Guest

    Thanks patrick !!!

    #43439 Reply
    jood
    Guest

    Hi Patrick
    different 4, is it dB.
    & is it constant for all diversity types in nokia.

    #43440 Reply
    Michael
    Guest

    I have seen this alarm many times i Orange GSM network i Switzerland. It was always the MHA (Masthead Preamplifier) which caused the problem.

    #43441 Reply
    Tag
    Guest

    Hi all,

    Thanks for the advice,

    IS this alram service affecting?

    #43442 Reply
    Patrick
    Guest

    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.

    #43443 Reply
    Tag
    Guest

    Thanks patrick,

    However i thought this alram only tell us that the Rx path and the rx diversity path,have some difference in the receive level?

    Pls advice

Viewing 15 posts - 1 through 15 (of 34 total)
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