Re: a few pretty tracks / suggested test

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

> 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.

Dear Peter and Steve,

May I ask you to do the following: on each TDC400 (or at least a few of them), 
look at the "W1" and "W2" outputs from the TDC on the scope, comparing them 
against the CAEN enable signal.  These signal are outputs from the TDC that
indicate when it is enabled for storing data into RAM1 and RAM2, respectively.
They are ECL signals on one of the ribbon cable connectors; I think that their
position is labeled on at least one of the TDCs, and it's listed in the 
manual (which I don't have with me right now--just let me know if you can't 
find it, though).

All of this, of course, assumes that you haven't yet found a source for
the current data truncation problem.

Thanks,

-- 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 --