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    User name R. Michaels

    Log entry time 14:21:46 on November12,2009

    Entry number 299223

    keyword=scaler/EPICS added for Compton

    Per request of Alex, there are 4 new scaler channels for the
    scaler-to-EPICS for Compton to allow addition of new diagnostics.

    The NIM/ECL is in the bottom-most NIM crate in rack 1H75B19
    (note, there is a CAMAC beneath this) and it's the 5th unit
    from right.

    The 13th to 16th channel of this NIM/ECL map onto the
    9th to 12th chan of scaler.

    Note, there are 5 free scaler channels. The only thing stopping
    us from using them is we need 3-foot twisted-pair ECL cables.

    Scheme is described in compton:~compton/bob/README sect. II.

    Also noted, the NIM/ECL at the far right of the NIM crate in
    rack 1H75B20 has many defective channels. At least 5 chan that
    I checked. The crate itself is ok. Does it matter for anything ?