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User name D.Wang/X.Deng
Log entry time 04:10:21 on November 05, 2009
Entry number 297466
This entry is a followup to: 297377
Followups:
keyword=RHRS Shower ADC problem found
We took the opportunistic controlled access to check the RHRS shower ADC
signals. And found that the ribbon cable for channel 16-31 of one ADC
(23rd slot in ROC 1) is unplugged. This explains the missing histograms
for shower ADC spectrum. From the database, the correspondence between
histograms and the ADC channels is as following:
histogram number v.s. ADC channel
16 16
19 19
21 21
23 23
25 25
27 27
30 30
45 29
49 18
51 20
53 22
55 24
57 26
59 28
We plugged back in that ribbon cable so from now on we should see those
histograms.
And the reason we don't see histogram 7 is simply because this channel is
empty.
The reason why we don't see histogram 34 is not understood yet. It may be
due to a bad channel. We'll check later.
A copy of this log entry has been emailed to: vasulk, rsubedi, xiaochao, reimer