[evlatests] Ku-band switched power status

[Ken Sowinski]

.>     1) ea19, in IF 'A' only:  Here we have a most peculiar multiplicity
> of states, different in PDiff and PSum.  This is not a simple gain
> effect -- this must involve the switched power synchronization, or some
> such.  I attach png plots for PSum, PDiff, and their ratio, Tsys.  A
> pure gain effect would not affect the ratio.

It is pretty clear in this case that power out of the requantizer was
much too high.  Without further evidence I would attribute what you
report to that.  It looks like set-and-remember failed here.

No comment on the ea20 probelms.