[evlatests] More 3-bit data

[Michael Rupen]

Rick, is it true that ea18 now looks just like all the other 3-bit antennas?
As Jim says that would be lovely.

         Michael

> In looking thru this one, I see one thing that we need to clarify.  EA18 does 
> not have "old" samplers on "new" boards.  It has the same samplers and 
> in-house assembled boards we were using before but with new firmware and 
> possibly installed in different modules.  If these now look the same as the 
> ACDI assembled boards, I would say our in house assembly techniques are 
> exonerated.
>
> Cheers,
> Jim
>
>
> At 04:39 PM 11/15/2011, Rick Perley wrote:
>>         Michael and Ken ran some more 3-bit tests.  Results are listed
>>         below.
>> 
>> Michael Rupen wrote:
>> >  Hi Rick --
>> > 
>> >    please have a look at:
>> > 
>> >  1- ku_switch_009.55880.84365119213
>> >    This is a single-subband experiment, switching back and forth
>> >  between 3- and
>> >    8-bit.  Key question is the stability of the gains (esp. bandpass)
>> >    throughout the run.
>> >    - The MIB software in the deformatter on ea14 was updated before
>> >  this run
>> >    -- at some point we should try this with all subbands, since the
>> >  problems
>> >      are sometimes confined to a few subbands
>>      Result:  No change of spectral shape or visibility amplitudes are
>> seen in this switching test, to an accuracy of 1% of so.
>> > 
>> >  2- ku3eq_sameFreqAll_3C345off_001.55880.8811090625
>> >    This is a 30-minute run, similar to the long run you've been looking
>> >  at on
>> >    3C84.  We claim that ea23-A is fixed, and ea18 is now working as a
>> >  3-bit
>> >    antenna (though we saw some oddities in ea18-A2 especially).  Please
>> >  have
>> >    a quick look to check both of these claims.
>> > 
>> >    Note that ea18 uses "old" samplers in new boards.  The state count
>> >    histograms are much nicer than they used to be!
>> >
>>      We have a working 7th 3-bit antenna!  All looks just fine:
>>
>>      1) ea23A1 is indeed looking like the others now.  It is giving
>> proper PSum and PDif now (it wasn't before).
>>      2) ea18 shows all the same features (both good and not-so-good) that
>> the other antennas show.
>> 
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