Log entry time 16:01:34 on December 09, 2011

Entry number 359680

The EDTM modules have been setup for the left and right HRS for the 
electronic deadtime measurement.  Both arms have one EDTM module as a
master.  This was done by setting

int master_arm = EDTM_EITHER;

int master_slotL = LEFT_SLOT1;  
int master_slotR = RIGHT_SLOT2;

in the header file: edtm.h

We then rerouted the cabling so that both S1 and S2m would have EDTM
pulses to create either a T1 or a T3 on the right or left arms, 
respectively.  The delays between the S1 and S2m EDTM pulses were 
adjusted in the edtmsetup file with

DRIGHT_S2M=50
DLEFT_S2M=60

This sets DELAY1 and DELAY2 appropriately for the left and right arms
respectively.  With these delays, the S2M EDTM pulse comes about 30 ns
after the S1 EDTM pulse, which is very close to the real trigger timing.

We do have one problem; we see double pulsing from S1 with the EDTM
 pulse.  This double pulsing is not seen from the EDTM modules
themselves, but after the signal passes through the LeCroy 4413 
discriminators.  The analog output going to the ADCs also does not show
a double pulse.  However, it is seen in the ECL output signal.