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    User name R. Michaels

    Log entry time 19:59:47 on October25,2007

    Entry number 209615

    keyword=L-arm trigger restored, EDTM not working

    I checked out the L-arm triggers T3 and T4. Looks good.
    I found that because of the minimal time delay on T3 (for NaI gate)
    there was a too-large split between T3 & T4 at the retiming.
    But the NaI gate had some overhead, so we delayed T3 50 nsec and
    compensated at the gate generator for NaI.

    Another issue is that the R-arm trigger refused to download. I
    power cycled the CAMAC and VME there, and it still got hung up.
    (It gets hung up after the 2nd MLU download). Just as I was
    continuing to chase it, it started working again, i.e. it completes
    the download.

    Two things on my to-do list which are not done:

    1) Check pedrun L-arm. Alex is using DAQ so I didn't try it.

    2) EDTM system isn't working on R-arm. Works on L-arm.
    I checked that signals are sent out ok, but I guess the
    jumpers are wrong (the units had been serviced this summer
    and maybe I didn't check the jumpers carefully).
    Investigating this takes 2 hours to pull out cables, etc.
    Will leave R-arm EDTM disabled for now.