[evlatests] correlator fault?

[Rick Perley]

    The phenomenon is a bit 'richer' than this.  My data show:

    1) It only occurs in IF 'A'. 
    2) It does consist of two, alternating states, but ...
          2a)  The period is 0.832 seconds (two integrations, in my test)
         2b) The amplitude is not necessarily 180 degrees -- depending 
on band:
                P:  100 degrees
                L:  35 degrees
                C:  180 degrees
                X:  70 degrees
                K:  160 degrees
                Q:  160 degrees.

    I haven't checked all baselines -- that's a lot of work! 

Claire Chandler wrote:
> I have seen a bi-stable phase state, with phases flipping 180 degrees on 
> alternate integrations, on baseline 5-23.  It occurs in multiple datasets 
> recently, at all frequency bands.  I think it must be a correlator 
> problem.
>
> Claire
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