[evlatests] Other problems noted ...

[Rick Perley]

    Some other problems found from last night's check, primarily from 
P-band ...

    1)  EVLA antennas 1, 2, 4, and 5 are not yet fringing at P-band.  
But 1C and 5D are not being flagged!  

    2)  Antenna 21 is low in sensitivity at P-band by a factor of at 
least 15 in IF#1 (IFs A and C), and is low by a factor of about 5 in IF#2. 
    3)  Antenna 26 is low in sensitivity at P-band by a factor of at 
least 25 in IF#1.  It is normal in IF #2. 

    4)  Antenna 17 shows occasional large (80 degree) phase jumps, in 
IFs B and D only.  The jumps are of the same magnitude for both IFs, and 
last 10 seconds.  This was seen in all bands.   Other than this, phase 
behavior was normal for all EVLA antennas. 

    5)  The first L-band continuum scan (which followed a P-band 
spectral line scan), showed large amplitude and phase changes, for all 
antennas and IFs, for the first 10 seconds.  The changes are suggestive 
of subreflector motion -- but the data were not flagged. 

    6)  The usual SSDs ('short shallow drops') were seen in abundance on 
most EVLA antennas, particularly at C-band.