Re: tpc

[Fred Gray <fegray@socrates.berkeley.edu>]

> The FADCs are set up in a "common stop" mode: they run until they receive
> a trigger, going circularly through the memory (when they get to the end, they
> start again at the beginning).  Consequently, you will have the 4096 samples
> immediately _before_ your trigger.  However, there's currently a problem:
> the DAQ reads the memory starting at sample 0 and going through sample 4095
> without regard to where the trigger came.  I need to change it to read the
> samples in the proper order, which I will do today/tonight.

Peter,  

I wasn't able to get to this today.  Sorry, I will do it tomorrow.

BTW, I've been working here on lossless compression of TPC data.  So far the
best I've gotten is a compression factor of about 3.5 at a rate of about 
10 MB/s of input data.  I suspect that my next version will do considerably
better if I can ever get it debugged...

-- Fred

-- Fred Gray / Visiting Postdoctoral Researcher                         --
-- Department of Physics / University of California, Berkeley           --
-- fegray@socrates.berkeley.edu / phone 510-642-4057 / fax 510-642-9811 --