[evlatests] P-band

[Rick Perley]

    The standard 'EVLA stress test' was run yesterday afternoon.  The 
system works well in general, but at P-band, there are many poorly 
functioning antennas:

    1)  13 and 16 are of course non-fringing (not yet fully equipped). 

    2) 25 is not fringing at all, but is equipped, so I think it 
should.  (Data are properly flagged). 
   
    3) 26B and 26D (IF #2) are not fringing -- and are not flagged. 

    4) 21B and 21D are very weak -- sensitivity about a factor of 100 
too low! 

    5) Antennas 11, 21, 23, 24, and 26 are all far too low -- 
sensitivities down by a factor of 2 to 100 from where they should be.  
(These factor vary by IF -- 23A and 23C are close to nominal). 

    In general, all EVLA antennas show degraded sensitivity at P-band -- 
by about a factor of two -- compared to the best VLA antennas.  Even the 
best performing ones (14, 17, 18, 19) are notably poorer by a factor of 
1.5 or so.