[evlatests] K band at antenna 23

[Charles Kutz]

The K-Band's F14 module in antenna 18 croaked. It has been replaced.
A work order was opened and is now closed.

Chuck

Ken Sowinski wrote:
> Antenna 23 works at K band.  It did not at first because
> there was an FRM fault at the subreflector was in the
> wrong position; a reset fixed that.  Delays, focus and
> pointing are all in reasonable shape.  Pointing should
> be could enough for the next collimation pointing run.
> Relative G/T is at least as good as the best VLA antennas.
> Better pointing would not make it any worse.  If B power
> level might not be as stable as we would like.  Walter
> set the attenuator levels yesterday, but today it was
> inappropriate.  I saw TP and SD varying by a factor of
> two over seconds, but later it settled down.  We should
> watch it for a while to see if it was merely a burble or
> is a chronic problem.
> 
> Antenna 18 works at K band, but seems to have lost its
> noise diodes.  SD is 0.0 for all four IFs.  I have turned
> off the Tsys correction for K band until it works again.
> 
> 
> _______________________________________________
> evlatests mailing list
> evlatests at listmgr.cv.nrao.edu
> http://listmgr.cv.nrao.edu/mailman/listinfo/evlatests