[evlatests] Tests, March 9 2006

[Ken Sowinski]

                       EVLA Recovery, March 9 2006

Most of the time was spent recovering from all the work that was done
on Wednesday.

1.  Antennas 14 and 16 did not fringe at all because an old ANTENNAS
file was in use that still had them on their old pads.  That was 
easily corrected.

2.  Once all antennas were available it was clear that phases were
not stable and that all three did the same thing at the same time.
Investigation showed that time in mchost (and mcmonitor and mc?)
was off by around 12 seconds and had been so since the OS upgrade
yesterday.  This, too, was easily fixed, but not by me.

3.  With stable phases it was clear that 14A and 14B were not working
right.  Large apparant delay errors and cross correlation spectra
that were garbage.  This was cured by cycling pwer on the sampler
and formatter modules in the DTS.

4.  There was about a -15 ns change in delay for 14C since Tuesday.
Jim told me that Mike said that there is something funny about that
DTS module.

The third problem was probably a result of turning off power at 
antenna 14 yesterday.  Besides these two modules misbehaving, the MIB 
in T304-D did not come up after power was restored and the module
was reset this morning.


After some semblence of orderliness was restored the last 2-1/2 hours
will be spent in another attempt at pointing on the grounds that the
pointing is so far off for the moved antennas that it is worth measuring 
even on a windy day.


If the pointing run cooperates the antennas should be in good shape
for test and astronomical observations this weekend.