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    User name R. Michaels

    Log entry time 14:32:37 on April22,2003

    Entry number 98032

    keyword=prl2 missing channels

    Here's what I found about prl2 data (2nd layer preshower on Left HRS).

    slot 23, chan 48-63 --> looks ok (similar to prl1, some data above pedestal)
    slot 22, chan 32-35 --> missing (Xiadong says these 4 blocks missing)
    slot 24, chan 34-47 --> missing (probably a cabling / detmap problem)

    I presume there is a miscabling or other problem in slot 24. It is unlikely
    a DAQ problem since pedestals appear and are normal. Also, some of
    the prl1 data are in slot 24 and look ok. Still, you could try moving that
    flat cable in slot 24 to another ADC, and you could try putting a DC level
    (from a battery) onto one channel and see if it saturates that channel in software.
    You could also look on scope to check the gate timing, but since prl1 and
    VDC-T0 look ok, I think gate timing is ok.