[evlatests] correlator fault?

[Claire Chandler]

Hi Ray,

It is definitely only on baseline 5-23, IFA.  I have not tested all modes, 
this just comes from examining the astronomical data from the last few 
days, most recently, yesterday.  But it is clearly there in continuum 
mode.  The only spectral line mode dataset I have looked at was at P-band, 
3MHz bandwidth, 4-IF with Hanning smoothing, and that did *not* show the 
problem.

Claire

On Thu, 2 Aug 2007, Ray Ferraro wrote:

> Claire,
> 	There was a problem with the sampler for Ant. 5, IFA (IF1, RCP) that 
> was resolved last Wed. However, it should have affected all baselines derived 
> with this antenna, IF. Could you report what IFs this is occurring in for 
> each observing mode this has been observed in. Thanks.
> 			Ray Ferraro
>
> Claire Chandler wrote:
>> I have seen a bi-stable phase state, with phases flipping 180 degrees on 
>> alternate integrations, on baseline 5-23.  It occurs in multiple datasets 
>> recently, at all frequency bands.  I think it must be a correlator problem.
>> 
>> Claire
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>> 
>