[evlatests] Scan change stuff

[Ken Sowinski]

On Thu, 29 Oct 2009, Barry Clark wrote:

> I ran a file which cycles around three slightly different frequencies:
> 4616.00, 4616.05, 4616.15.  On scan changes, fringes vanish for a while
> on the transitions 4616.05->4616.15 and 4616.15->4616.00, but not on
> the transition 4616.00->4616.05.  This happens on all baselines.
>
> They are usually gone for ten seconds, but sometimes twenty.
>
> Some sort of shenanigans either in the Executor or Station Board
> software.

Is it possible that the L302s and the phase calculation on the
station board disagree about when the freuqency changes?