[evlatests] X-band

Rick Perley rperley at aoc.nrao.edu
Fri Feb 10 14:35:47 EST 2006


    From last night's data (10 Feb 06):

    Antennas 13 and 16 dead, as at all other bands.

    Antenna 14 worked well -- except it vanished at 12:11:21 (and the
reported Tsys went sky-high at the same time). 

    When on source, antenna 14 amplitude stability was excellent.  No
odd behavior noted. 

    14AB sensitivity slightly worse than VLA antennas.  14CD
sensitivity *much* worse than VLA antennas. 

    Reported Tsys for 14AB normal.  Reported Tsys for 14CD very
high -- 4 x normal.  This would account for poor sensitivity reported
above.  Expected step in Tsys from source to cold sky was seen on
14AB, not seen (or barely seen) on 14CD.  Looks like the reported
values are reasonable. 

    Not much else to report. 



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