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Thread: EXTERNAL CLOCK REFERENCE PROBLEM

  1. #1
    Junior Member Reputation: 10
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    2014-04-17
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    1


    Default EXTERNAL CLOCK REFERENCE PROBLEM

    Please I need help on how to clear external clock reference alarm on TDM and IP clock failure on IP site for 2G sites

  2. #2
    Users Awaiting Email Confirmation Reputation: 332
    Join Date
    2009-01-25
    Posts
    348


    Default Re: EXTERNAL CLOCK REFERENCE PROBLEM

    SET BTSIPCLKPARA: IDTYPE=BYID, BTSID=94, CLKPRTTYPE=PTP, CLKTOPOMODE=PTPOVERUDP, ISCLKREDUCY=UNSUPPORT, MASTERIPADDR="xxx.xxx.xxx.xxx";
    with xxx is your ip clock server

  3. #3
    Junior Member Reputation: 10
    Join Date
    2010-05-04
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    11


    Default Re: EXTERNAL CLOCK REFERENCE PROBLEM

    you must check the frequency deviation by DSP CLKTST:SN=7; make sure all is locked not Free Running

  4. #4
    Member Reputation: 80
    Join Date
    2009-12-28
    Posts
    33


    Default Re: EXTERNAL CLOCK REFERENCE PROBLEM

    Dear if all are not lock then what to do...?????????


    Br

  5. #5
    Junior Member Reputation: 10
    Join Date
    2010-05-04
    Posts
    11


    Default Re: EXTERNAL CLOCK REFERENCE PROBLEM

    you need to check on U2000 for clocking connection & Quality
    if those are good, you have to "tune" the Center DA by add/reduce until deviatioin is around -11dB.
    to get clock calculation :
    A : (Freq Discremination/1000)*1667
    B : A (+/-) Current DA

    Note : (+) for -A and (-) for +A
    B : Center DA

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