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    User name V. Sulkosky

    Log entry time 19:22:51 on April 25, 2009

    Entry number 268432

    This entry is a followup to: 268034

    keyword=Re: 1024 Hz clock fixed on R-HRS

    I found that the eighth channel of the LeCroy 4616 was being used as a
    fan out. Besides the input for the normalization scaler, one copy was
    going to the PVDIS setup and the other copy I will give details on below.

    I decided to remove both of these outputs. I have found in the past, that
    it is best not to use all the NIM outputs on these modules as fan-outs,
    hence the bad scaler clock. I sent a copy of the clock for PVDIS from the
    PS 757, which is used as a fan-out. I completely removed the other copy.

    More details;

    The second copy of the clock was being sent to a level translator. From
    this module the clock was connected back to the normalization scaler 4616
    module in channel 5, which would normally be T5. I have no clue what
    someone was trying to do, but they created a loop from and back to the
    4616. As soon as I unplugged this loop, the clock returned to normal.

    A copy of this log entry has been emailed to: rom,brads,zhaobo,rsubedi