[evlatests] Strange Tcals and Switched Power behavior

[Barry Clark]

To look at Tcals in the evlaparm database, the easiest way is
~bclark/mcme/genexecq commons.util.CalSpectrum <receiver> <antenna> 
<polariz>
Example
~bclark/mcme/genexecq commons.util.CalSpectrum 6GHz ea15 R

I can make a simpler launch script if needed.

Ken Sowinski wrote:
> On Sun, 31 Oct 2010, Rick Perley wrote:
> 
>>    At L-band:  Most of the values are quite nonsensical.  Typical
>> values are 20 to 50 K.  Some of them are over 200K.  One antenna (24, on
>> all IFs) has *negative* values of Tcal.
>>    A S-band,  the antennas with receivers have at least reasonable
>> values in the table.  I note that antennas without receivers have
>> reasonable values also -- one wonders how this can be ...
>>    At C-band, three antennas, which produce decent fringes, have Tcal =
>> 0.000  (Antenna 14 and 23 on all IFs, and antenna 16 on B and D IFs).
>>    At X-band, all values look reasonable (but are they right?)
> 
> Rich has been working on this in mcaf and we should look at
> it again when he has deplyed a new version.  Independently
> Vivek is looking at how to verify that we have correct Tcals
> in the parameters database.
> 
>>    I also note that antennas 10 and 24 are not detecting the
>> synchronous power -- either the noise diodes are not switching, or the
>> synchronous detection system is broken.  The reported values are all
>> uniformly distributed about zero.  This is the case on all IFs, and at
>> all bands.
> 
> Evidence is that the noise tubes are not turned off because
> the are detected in the downconverters.  (I just checked this.)
> That means that the antenna timing must be off by exactly
> 10 msec, or something is wrong with timing in all four station
> boards connected to each of these antennas.  Rob, Bruce???
> 
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