Log entry time 23:00:20 on March16,2008

Entry number 228640

Khem continued calibration of the hadron package scintillators with sources.

Xin investigated sources of noise/double pulsing in the bigbite chamber signals.

I investigated using various CAMAC delay/gate modules for use in timing the 
LHRS/BigBite coincidence.  I found that the CAEN 469 module we have is 
unacceptable (FSR is much too large).  I think we'll need to use analog delay 
for the hadron package triggers (~150ns)... but the LeCroy 4518 with the JLab 
programmable width module should be good for the LHRS triggers.

Also:
  o rerouted the RG-8/58 and RS-485 cables from the LHRS so that they were less 
of a trip hazard.
  o sent down the 1024Hz pulser through rg-58 (1)
  o moved the signal Bob used on rg-58 (5)...
     On the LHRS side... connected the TM module to RG-8 L1A/L 
     On the BB side, connected this cable to L1A.
     rg-58 (5) is not currently used.
  o Reran TWOARM config... and verified it still worked.
  o Performed a simple rate test with the 1024Hz pulser.
      Both BigBiteOnly and TS_Hadron (trigger plane only) configurations had 
~950Hz L1A.  The TWOARM config had about ~200Hz.  The LHRS crates may be 
running without ped suppression.
  o Removed the hack to sync the dE and E triggers... and replaced it with 
analog delay.
  o Remeasured the E trigger timing (everything is comparable to previous 
measurements).