Re: fadc dynamic range of FCAL

["Mark M. Ito" <marki@jlab.org>]

If you have a 10-bit flash, and your pulses show up in 4 time slices, 
then you have roughly a 12-bit dynamic range. That is a factor of 4096. 
If you set the top at 9 GeV then the least count is 2 MeV. So you 
measure your 30 MeV in about 4-bits, which is not bad.

9 GeV is probably more than you will ever see, so that spec can probably 
be relaxed. Plus there is the trick Elliott mentions for the rare whopper.

Note also that we are not talking about firing a discriminator with a 
threshold. The FADC info will be there, it is just a matter of how quiet 
the pedestal is.