From wagner@fnal.gov Mon Nov 19 06:57:24 2001
Date: Sun, 18 Nov 2001 18:18:39 -0600
From: Bob Wagner <wagner@fnal.gov>
To: ambrose@fnal.gov
Cc: Morris Binkley <binkley@fnal.gov>
Subject: Looked at SL5-165 noise


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Dave,
    Morris and I looked at the SL5-165 noise.  All channels have a 100%
double pulse at about 70ns.  When we first looked at it, the inner
channels particularly also had some "random" noise.  A second look after
turning off the HV and pressing around some F-cages showed no random
noise on the inner channels and a little on chs 8-11.  We could not get
the double pulsing or the remaining noise to budge by tightening grounds
on the HVDBs or reseating the F-cages. 
    At the moment, the random noise is gone or extremely small on all
channels.  The double pulse is still there.  I would just let this one go
for now.  We will check the noise again after turning on the high votage
this evening.
                                                         Bob