[evlatests] antenna status

[Ken Sowinski]

As Michael reported a few minutes ago there are a few problems.
I can confirm what he wrote and escribe a few other problems.

The ea24-l302-1 MIB is not responding; hence AC is dead.

The ea18-l302-1 fails to lock at L band (14368.1).  Neither
retuning nor a reboot helped.  It looks at all the other
bands used.

Antenna 18 has no power at C band.  The M301 broke or something
has been disconnected.

Antenna 13 reports very low (~0.3 V) SD voltages, but the T_sys
appears to be OK because the amplitudes are very large.

Antenna 16 reports SD voltage of 0.0 at Q band.  No fringes either.
The F320 claims that the noise tubes are on and switchning.



A few minutes were spent looking at relative G/T to see how
the EVLA antennas compare with the VLA antennas.  Michael will
be able to preapre a more comprehensive report from his observations
this morning.

C band
14 is among the best
13, 16 are OK
18 was dead

L band
18 is among the best; but AC is dead; see above.
14, 16 are OK
13 is poor

X band
16 is the best
13, 14 are OK
18 is very bad; about 1/3 the expected power repsonse.

K band should not be taken seriously because pointing was
not checked, but...
13, 14, 18 are all comparable to VLA antennas
16 was a little worse