[evlatests] T304 attenuator changes

[Michael Rupen]

Hi Rob --

On Mon, 22 Jun 2009, Rob Long wrote:

> Hi folks,
>
> I read about the attenuator settings problem you appear to be having while I 
> was on vacation.  Has anyone noticed if the T304 attenuator values are 
> actually changing after each scan?  If I have an exact time period, I can go 
> into the archives and tell what the attenuator settings are doing during this 
> file.
>
> Rob


We can see the amplitude going up and down at scan boundaries, so that
seems pretty clear.  We intend a test tomorrow spending some time
with attenuators fixed, to see whether or not the same effect occurs;
that should show definitively whether we've correctly diagnosed the problem.

              Michael