[evlatests] Bandpass shapes for antennas 6 and 11, in IF 'B'

[Michael Rupen]

It would be interesting to check this for the other floppy bandpasses...
right, Laura? :)

           Michael

On 
Thu, 8 Apr 2010, Rick Perley wrote:

>    In my previous report, and in today's meeting, I noted that:
>
>    a) Baseline 6 x 11, in IF 'B' only, has a essentially perfectly
> sinusoidal amplitude variation, of period ~2.5 minutes.
>    b) Antennas 6 and 11, individually, in this same IF, showed variable
> bandpass solutions, but only on the ~5 channels at the two edges of that
> band.  (Floppy edges).
>
>    Lorant wondered if there might be some connection here.  It was good
> that he asked ...
>
>    The variable bandpasses which showed up the the BPLOT display are
> indeed *not* due to the antennas involved, but are generated by the
> bandpass of baseline 6 x 11 alone.  All  other baselines to both
> antennas are fine.
>
>    Unfortunately, the sinusoidal cross-correlation amplitude is visible
> in all channels, independent of bandpass shape.  And, the 'square wave'
> amplitude seen in 6 on that same IF is present on all baselines to that
> antenna.
>
>
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