1. Changed the discriminator high threshold from -60 mV to -120 mV.
2. Tested a veto signal; did not see gas-cherenckov signal. While tracing back, found that, in the 2nd floor, an ECL cable from discriminator to level translator was missing. Revived. Also noticed that a knob in the 3rd quad of PS 755 module (which forms the veto using two inputs) was in position "1" instead of being in position "2".
3. Added 8 cables (4ns each) from the tagger circuit ORing module (where tagger is ORed with pvdis signals) to 5th NIM-ECL module in channels 5-12.
4. Disconnected a ribbon cable from the back of the 2nd NIM-ECL module and connected it to the back of 5th NIM-ECL module. This ribbon cable goes to the 4th scaler top postion as before. This was a redundant ribbon cable that used to connect from the back of the 1st NIM-ECL module to the 4th scaler top position (there is already another ribbon cable that connects the 1st NIM-ECL module to the first scaler).
5. Redued 37 ns in shower part of the SUM8 to linear sum (PS 740) for
group2, group6 and group7.