Deadtime estimates and false asymmetries:

Measure the product of the electronic and DAQ livetimes by counting the
number of T7 (pulser) events are recorded as T3 (physics) events.

Measure the DAQ deadtime by comparing the number of record T3 events to the
total number counted by the scalers.

For run 4456 (He3 production run at 8 microamps):

    T7's as T3's :              14449
 of T7's in scalers:            19848   -->  72.8 %  = DAQlt*ELlt


    T3's in datafile:         1772363
 of T3's in scalers:          2166012   -->  81.8 %  = DAQlt

So the electronic livetime is     89.0 %  = ELlt


Given that the run was at a T1 rate of 2.5 MHz, with the pulse from the
ND 50ns wide, gives an electronic deadtime estimate of 12%.