[evlatests] EVLA K-band sensitivity revisited

[Gustaaf van Moorsel]

Some time ago, I showed preliminary results of EVLA sensitivity across
K-band.  Recently I did new tests specifially aimed at exploring the
band edges.  The attached plot summarizes the results.

Observations were done in spectral line mode, 16 channels, and the rms
was taken over the central 8 channels, for antennas 13, 14, 18, 24, and
26 (antenna 16 was not in the array at the time of observation).  The
plot shows the rms for each IF pair, at frequencies spaced 200 MHz apart.
To keep observing time to a minimum, intermediate frequencies were not
observed this time.  The flux scale is arbitrary, but identical across
the band.  Note that at the lowest frequency there were no valid sol-
utions for BB and DD, and at the second lowest frequency none for BB.

Gustaaf
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