[evlatests] Widar data over the weekend.

[Michael Rupen]

> Some comments:
>
> On Mon, 8 Feb 2010, Vivek Dhawan wrote:
>
>> 1. WIC loops C and X band, Friday evening. 24 antennas in the array, not all
>>   fringing, not always the same ones:
>>
>>   WIC loop C band starting at MJD 55233.041
>> 13 R,L dead. 11 OK. 15 ? . 25 R, 26 L, 27 L dead.
>>
>>   XWIC loop at 55233.062
>> 11 R,L dead. 13 OK. 15 R dead. 25 R absent, L dead. 26 R,L dead. 27 L dead.
>
> ea13 has no C band receiver; ea11 amd ea26 have no X band receiver.
> ea25-A station board is declaring all data invalid.
> ea27-C not fringing at X band; to be investigated.
> ea15-A deformatter misbehaving.

ea15-C deformatter was misaligned though that should have left (odd looking)
   fringes.


>> 2. X-band delay setting: 2 files from Sunday afternoon,  Xdelay 55234.873
>>   and 55234.896,  each had 3 subbands of 128chan, RR & LL. In both,
>>   RCP is fine but LCP has a phase rate; this is a polarization pair,
>>   the rate cannot arise at the antenna since they share the same LO,
>>   so its likely in the correlator. We saw this in a short file last week,
>>   I think Ken had some ideas but I forget what he said then - we hoped
>>   it would never appear again -alas.  The new factoid is that the rate
>>   changed when sources changed 3C345 to 3C84. It looked like a steady
>>   rate for ~20min on 3C84. I have not had a chance to look at the delays
>>   that were found from this data.
>
> I had no idea except for the obvious thought that it must be
> in the correlator.  Did this not appear in the WICloop data?
> If so, then the Xdelay script must be tickling something.  It
> is probably worth doing a Cdelay script to see if it is related
> to sideband.
>
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