[evlatests] antenna 17 first fringes

[Ken Sowinski]

Yet another antenna that worked immediately when pointed.
Delays and focus have been set.  Pointing may be about
right.  The uncertainty is because G/T is down about a
factor of ten from what we expect.  I don't suspect pointing
yet because the beamwidth is about right and I find sidelobes
where I expect to see them.

That leaves high T_sys, which is not in disagreement with
the low SD voltages, or added noise somewhere along the way.
The antenna does not appear to be out of sync, and re-syncing
it did not change anything.

A pointing run, if we could find the time, would make clear
whether pointing is OK.