[evlatests] EVLA Misbehavior Last Nigh

[Barry Clark]

Oh, I forgot to mention.  Antenna 24 was also doing that during the day
yesterday.  It was totally freaking out Telcal, which I was using heavily,
so I stopped including it.

>     1) Antenna 24 is seriously misbehaving.  The A and C IFs have 
> perhaps a dozen abrupt drops in amplitude, by about 30%.  The drops are 
> simultaneous in both IFs, but are always 'single' -- the next 1.67 
> second record is at the proper level.  The B and D IF behavior shows the 
> same drops (simultaneously with the A and C), *** and in addition*** 
> have major and long-lasting changes in amplitude -- by a factor of two.  
> The phase behavior of this antenna is terrible -- large (> 50 degree) 
> jumps, probably coincident in time with the amplitude jumps.  The phase 
> jumps are never 'single' -- the jump in phase is retained for tens of 
> seconds until another jump -- which rarely returns to the same phase.
>