[evlatests] Antenna 2, IF B, at 7885 MHz
Rick Perley
rperley at nrao.edu
Tue Apr 14 12:32:12 EDT 2009
Deep C-band polarimetry observations were made Sunday night.
Detailed results (which are all very good) will be presented elsewhere.
In calibrating the data, a single oddity was noted. Observations
were made at 8 frequencies, from 4385 through 7885 MHz. For all
wideband antennas (2 3 9 15 21 24 28), at all frequencies and IFs, the
sensitivities were as expected, *** with a single notable exception ***
Antenna 2, in IF 'B', at 7885 MHz, had an effective Tsys nearly
three times too high (125 K, rather than the expected 45). The Tsys
(switched power) table indicates nothing unusual.
I have no ready explanation for this oddity.
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