[evlatests] P-band status

[Rick Perley]

     Some P-band data were taken earlier this week.  Frank asked me to 
check on the quality:

     I extracted the four scans of 3C147, and used five spectral windows 
(5 through 9).  I find:

     1) Antenna 28 was in the barn, and antennas 13 and 14 were both out 
of service during these observations.

     2) Antenna 23 was in a peculiar state -- the 'Y' channel oscillated 
in delay on a fast (few seconds) timescale.  The 'X' channel also had 
irregular delays, but only for the first two calibrator scans -- it 
seemed fine for the last two (two hours later).

     3) Requantizers seemed to be working (meaning, they changed level 
between the second and third calibrator observation).

     4) CALIB gains (after applying the RQ correction) showed a wide 
range of antenna correlated power -- a factor of four between highest 
and lowest for a given SPW.

     5) The 3 MHz bandpass ripple is strong on:  7X (2dB, pk-pk in 
power), and 17X (2 dB).  All others are less than 1dB.

     6) With respect to 'golden antenna 24', the cross-polarization is 
high (above 10%) on:  ea03, ea10, ea14, ea16, ea17, ea18, ea19, ea21, 
ea22, ea27.  These are likely to to dipole orientation.  A confirmation 
check would be useful.

     Rick