User name R. Michaels
Log entry time 16:09:30 on December31,2007
Entry number 222444
keyword=EDTM delay offsets
In the summer 2007 the EDTM modules were refurbished to have a
larger dynamic range. Ideally they would also have the same offset
delay (doesn't matter what it is because it cancels), but I notice
they do not. Here are the propogation delays out of the units
L-arm slot 1 (S1) = 133 nsec
L-arm slot 10 (S2) = 130 nsec
R-arm slot 1 (S1) = 166 nsec
R-arm slot 13 (S2) = 424 nsec !!!
This needs to be accounted for when setting up coinc. trigger.
And I'll try to get it fixed in the Feb down.
I did verify that the calibration is the same for each module:
2.2 nsec per bit.