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

[Rick Perley]

    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.