[evlatests] EVLA during AR570: Sun. 26feb06

[Michael Rupen]

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AR570 run: 26feb06 11:46-13:46 IAT
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M. Rupen 27feb06

Mostly low dec (Galactic Center region)

L C X bands

Summary:
   - ant. 14 IF 2R missing entirely
   - ant. 16 mostly random phases at C,X bands, except during short periods
     within a couple scans.
   - some odd behavior at X band: a phase jump in IF 1 for all EVLA antennas,
     but only in ant. 16 in IF 2

L band:
   ant. 14: missing IF 2R throuhgout
   ant. 13,14,16: simultaneous amp. suckout and phase jump on VLA-EVLA
     baselines for 6 seconds -- EVLA-EVLA baselines are fine.  Note that
     phases are consistent, just not the same as before or after (this is
     within one scan).

C band:
   ant. 13 mostly OK
   ant. 14 missing IF 2R throughout
   ant. 16 random phases and low amp. on most scans with VLA antennas
           EXCEPT an 8-minute period *within* a fast-switching scan,
           and the very last scan (on 3C286)
           - EVLA baselines (between 13,14,16) fine throughout
           - ant. 13,14 go away similarly in a couple scans, but
             not for the bulk of the run

X band:
   ant. 14 missing IF 2R throughout
   ant. 16 random phases and low amp. throughout, EXCEPT one 17s period
      (in all IFs).
      During that period (which is at the end of a scan):
      - EVLA ant. 13/14 IF 1 phases jump at the beginning; their amps. also
          go up, but for only 3-6s at the end of this period
      - EVLA ant. 13/14 show NO ph.jump in IF2, except wrt. EVLA ant. 16.

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