[evlatests] 25 MHz correlator offset poblem

[Gustaaf van Moorsel]

Michael Rupen wrote:

(I wrote earlier:)

>> As an aside, just like last time, an effect reminiscent of the
>> correlator offset problem was seen, but disappeared after flagging
>> antenna 23, stokes 'RR', IF 1.  Note that the 'real' offset problem
>> was not antenna specific.
> 
> This sort of antenna-specific problem has in the past been fixed by 
> futzing with the sampler.  It might be worth checking with Ray Ferraro 
> about this.

Some time last week Ray swapped samplers, and I did a test observation
this weekend to see if the problem moved with the sampler.  It does not.
The off-set-like problem stays with IF A (IF 1, Stokes 'RR').

Gustaaf