[evlatests] L302 dropouts explained...

[Walter Brisken]

I should have clarified about antenna 24 that for EVLA files produced 
using obs2script (where all things of importance happen on IAT 10 second 
ticks) the value of the walsh function for 24 is 0 at the critical instant 
within the walsh function cycle.  For EVLA scripts not aligned to IAT 10 
second ticks a different (perhaps random) phase of the walsh function is 
pertanent.  In some cases the first scan of a file is different in that 
the executor's 10 second interval is not yet tied to the VLA (IAT) 10 
second phase until a stop time is reached.

During today's tests we continued to see at varying intervals the n*60 
degree jumps that Barry mentioned yesterday.

-Walter

On Fri, 7 Jul 2006, Ken Sowinski wrote:

> The remainder of the time was devoted to a long observation
> of 3c273 with short integration time.  The intent was to
> provide more information about the ten second dropout, but
> Walter's announcement may make that moot.  I note that,
> in contradiction to Walter's explanation, that 24AC was glitching
> when this observation began.  In any case this may provide
> useful data with five EVLA antennas for Rick to examine EVLA
> closure properties.
>
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