Log entry time 20:52:01 on February 10, 2011

Entry number 346324

I have updated the edtmsetup script to include the programmable delay
module on BigBite.  The update includes a call to a new script called
edtm_delay, which takes two parameters LDELAY and RDELAY.  In the case
of a proton in left HRS and electron in right HRS, LDELAY represents
the TOF difference between the proton and electron.  RDELAY represents
the time difference between EDTM pulses arriving at the trigger logic.  

Currently RDELAY is equal to 94 ns and probably should not change.  From 
my measurements for the cables and module delays I estimated this number
 to be about 70 ns.  Hence, I was not far off from reality.

 RDELAY is determined by the cable lengths to carry the EDTM signals
 from the weldment to the HRS's and become injected into the trigger
electronics.  This parameter removes the time difference between when
the EDTM signal arrives at the left and right HRS.  Most of this time 
difference is due to the slower cable used for the left arm 260 ns 
versus 190 ns.