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Thread: UMTS900 RTWP Issue

  1. #1
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    Question UMTS900 RTWP Issue

    Dears,

    after activating UMTS 900 RTWP increased on existing UMTS2100 all sites, any justification !!!



    Thanks

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  3. #2
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    Default Re: UMTS900 RTWP Issue

    Quote Originally Posted by gunpowder View Post
    Dears,

    after activating UMTS 900 RTWP increased on existing UMTS2100 all sites, any justification !!!



    Thanks
    I think this interference froms existed GSM900.

  4. #3
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    Default Re: UMTS900 RTWP Issue

    There are diplexers? or other elements sharing the same irradiate system?

  5. #4
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    Default Re: UMTS900 RTWP Issue

    yes there are diplexers (Indoor site)

  6. #5
    Junior Member Reputation: 13
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    2011-06-13
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    Default Re: UMTS900 RTWP Issue

    I think may be power consumption more than first equipments. the equipments are saturated. (you check power maximun for diplexer)

  7. #6
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    Default Re: UMTS900 RTWP Issue

    Dear All,

    Can you elaborate more how can duplexer affect UMTS2100 when existing with UMTS900

    Thanks

  8. #7
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    Default Re: UMTS900 RTWP Issue

    if the power going through the duplexer is too much to handle then all sort of intermodulatory products & internal power reflections could occur.When troubleshooting try by passing duplexer & directly connecting to antenna using a long jumper.If it goes down duplexer is the issue.
    Add me Rep to become a Senior Member :)

  9. #8
    Member Reputation: 29
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    2010-05-04
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    Default Re: UMTS900 RTWP Issue

    Dear
    what is the configuration of U900 cabinet, is it Mixed mode or Stand alone?, is there TMA co sharing?, what is the gain of this TMA?

  10. #9
    Senior Member Reputation: 322
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    2012-03-21
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    Default Re: UMTS900 RTWP Issue

    Dears

    I need the formula of getting RTWP in E******* oss please!

    Thanks
    Khaldounh

  11. #10
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    Default Re: UMTS900 RTWP Issue

    Here it is:

    Counter PMSUMULRSSI/PMSAMPLESULRSSI. To be found in table CELLSTATS_DELTA. The range of the value is 0-621. The formula you need to calculate the real value in dBm is: dBm = -112 + value*0.1

    Two bits of information: Due to the E*** system architecture, RTWP sohuld be calculated as the minimun in very low traffic conditions. This is normally attained in the small hours of the morning. A normal (and fairly healthy value) is -104 dBm. Anything above -100 dBm should be considered wrong (But, please, do not forget is a daily minimum. It is not relevant if the counter is -80 dBm at full traffic)

    Regards

  12. Thanks khaldounh thanked for this post

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