[evlatests] Global Phase Jumps, continued ...

[Rick Perley]

    'Stress' tests done yesterday indicate that the 'global' EVLA-VLA 
phase jumps appear to be triggered only by changing the BW (or Fluke 
synthesizer). 

    Yesterday's test used the following sequence of observations:

    a) Three consecutive scan of the same source at L-band, BW=50 MHz, 
standard frequencies. 

    b) A single observation of the same source at P-band, BW = 3.125 MHz. 

    c) A single observation of the source at C-band, BW = 50 MHz

    d) A pair of observations of the source at X-band, BW = 50 MHz. 

    e) Single observations at K and Q bands, with BW = 50 MHz. 

     This sequence was run three times. 

    Results:

    There are no global phase jumps between the consecutive observations 
at L-band or X-band. 

    There are global jumps  between the sequences.  The value of the 
jumps are different between AC and BD IFs, and are different for each 
band.