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    User name V. Sulkosky

    Log entry time 20:28:43 on March 21, 2008

    Entry number 228717

    This entry is a followup to: 228697

    keyword=R-HRS Gas Cerenkov and T2

    I have completed the cabling for the gas Cerenkov "or" of 10 PMTs. This
    signal is plugged into channel # 11 of the LeCroy 4413 discriminator in
    Crate # 2, slot 6.
    In preparation for forming the T2 efficiency trigger, I have sent a copy
    of this signal from the LeCroy 4518 delay module used for the gas
    Cernknov in slot 7 from output # 3, channel # 11 into another delay
    module in slot 11, channel # 15.
    The following table shows
    the input signals to the 4518 delay module: LeCroy 4518 Delay Module
    Slot # 11 
    Input Signal         Input Channel       Input Channel to MLU
-------------------------------------------------------------
"or" of S1 paddles       14                      0
"or" of S2 paddles       15                      1
"or" of Cer 10 PMTs      16                      2
T1 trigger                1                      ?
    There seem to be multiple inputs into the delay module, which do not
    seem to go anywhere. However, I was reluctant to disconnect them, since I
    wasn't sure about their purpose.
    I also verified the location of the TDC and ADC for the gas Cerenkov. Currently the HVs for S1, S2 and the gas Cerenkov are on in the R-HRS.

    A copy of this log entry has been emailed to: camsonne@jlab.org,rom@jlab.org