[evlatests] correlator fault?

[Ray Ferraro]

Yes, that's probably what I am going to do. I'm just waiting for a 
period of time when the array is in a stable continuum observation so 
that I can look things over and have the operators check something for 
me. Thank.
			Ray

Ken Sowinski wrote:
> On Thu, 2 Aug 2007, 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.
> 
> There is definitely a problem with 5-23 IF A right now.
> I have not examined many baselines, but 1-23 and 1-5 both
> look normal.  It is likely a sampler problem, but I can't
> explain why other baselines to antenna 5 are not affected.
> 
> Looking at 'rawish' data from the correlator it looks like
> 5Acos*5Acos is sometimes not very stable.  Let's replace
> the sampler and see what happens.
> 
>