[evlatests] ANtennas 13, 14, and 16 on Sunday/Monday -- L Band

[Rick Perley]

    I'm reviewing the EVLA antenna performance over the long weekend run. 

    For L-band, I find (all times are local -- add 7 hours to get to IAT): 

    The array came up at 16:00 Sunday with 13, 14 and 16 all working, 
nominally.
   
    But, antenna 13's L-band amplitudes are a factor of 7 too low from the
beginning until 23:30 , when it went off the air (the limit problem).   
13 was
then dead until 8:30 the following morning, when it came back *with
proper amplitudes!*.   Why was it so weak at the beginning? 

    Antennas 14 and 16 were o.k. at the beginning.  Both were dead from
19:15 through 19:45 PM. 

    Antenna 14 went out at 22:10 until 8:30 the following morning, 
presumably
 because it was in a limit. 

     Antenna 16 came and went all night long:  Off from 20:20 to 20:35,
off from 21:10 through 21:15, off from 21:56 through 00:30, off from
04:38 through 04:56, from 6:27 through 6:28, from 7:50 through 8:30
(note, 13, 14 and 16 all came back together at 08:30), and finally 16 was
off for the final 3 hours of the run, 18:00 through 20:15 (last night). 

    Sadly, that doesn't leave much time when all three were working well
at L-band:  from 8:30 yesterday morning through 18:00 last evening. 

    I'll check X-band next, the other frequency where all 3 EVLA antennas
work.