[evlatests] Correlator problem

[Drew Medlin]

I looked at the pipeline output from a few SBs from last night (still working through the long weekend) and I can see ea04 has issues, but no sign of this for ea03 in the pipeline results I've checked so far ( S band, C band 3bit). 3bit in C band shows nothing apparently bad given the plot resolution for ea04, though. Plots from an S band observation last night for ea03 and ea04, normalized bandpass solutions. 



Cheers,
Drew




Drew Medlin
dmedlin at aoc.nrao.edu

Scientific Data Analyst - VLA Scientific User Support Group
National Radio Astronomy Observatory

> On Nov 30, 2020, at 12:54 PM, Rick Perley via evlatests <evlatests at listmgr.nrao.edu> wrote:
> 
> Tests run last night show that the bandpasses in the LCP, 'BD' IF are bad in ea03 and ea04.  The amplitudes show a sawtooth pattern, with period equal to two channels, and a larger-scale 'beat' with period 16 channels.  ea04 is by far the worse of the two.  This is seen at all bands.
> 
> 
> 
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