Re: a few pretty tracks / suggested test

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

> Good luck. I am waiting for some good news tomorrow. Please

Hi, Peter,

No really good news yet.  Some information, though.  

1. I calculated the data rate implied by taking successive differences between
consecutive TDC400 time words (the distributions of time differences are 
nicely exponential as expected).  It is an order of magnitude higher than the
observed data rate.

2. I looked at the last time seen in each TDC in each event.  It is typically
about 0.01 seconds, and it varies from one TDC to another within the same
event.  However, typical event lengths were probably more like 0.05 seconds.

Consequently, I conclude that the TDC data is being truncated somewhere.
Now, is that because of a DAQ software mistake, or is it in the logic?  
I don't know.  I've been poring over the software, and the mistake certainly 
doesn't leap up from the page at me.

I will check e-mail regularly tomorrow during the day, and please feel free 
to call my cell number. 

-- 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 --