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User name R. Subedi
Log entry time 23:19:39 on November 07, 2009
Entry number 298194
keyword=Controlled access work
One of the outputs of RHRS gas-cerenkov signal from the first quad of the
veto part of PS755 which went upstairs was not plugged in anywhere; and
it was causing a reflection to the other signal that was going to the
fastbus TDC for pvdis setup. I unplugged that unused output, there is no
reflection now. This also made possible to see the pion veto there. We
now see both electron and pion vetos in the RHRS. I also removed a 16 ns
cable from T1 which goes to the second quad of the veto part of PS755 so
as to make gas-cer input in the first quad there is 10 ns earlier than T1.
No T1 reflection found anywhere. Verified that the L1A was plugged in
into the normalization scaler of RHRS in ch12 and moved the strobe from
ch28 to ch29.
Verified that RHRS pvdis narrow path was 30 ns wide and wide path was 100
ns wide (Kai did the same in LHRS).
I did not see any any double-pulsing in Elecron Narrow signal in group3
Verified that all the offsets in LeCroy 428F were zero in LHRS pvdis
setup. Except in the 1st (counting from left) module's 4th quad had to be
decreased by 10 mV and the third module's also 4th quad had to be
increased by 15 mV.