[evlatests] AL693 -- Modcomp-Free

[Rick Perley]

    A quick look at the data from this first astronomical run under 
modcomp-free control shows things are in fairly good shape:

    I filled the data with system flags applied, and without, to permit 
direct comparison. 

    The 'slew' flags are working fine.  The first unflagged record might 
be marginally low, but one has to squint hard to see it ...

    At L-band:

    *   Antennas 6, 7, 15, and 22 are being flagged bad, when in fact 
the data appear to be fine.   Of these, antenna 15 was stowed this 
morning for cryo work -- so there must be something amiss, but which is  
not sufficient to make data bad. 
    *  Antenna 18 was good in the beginning, then went dead.  This was 
correctly caught by the flagger.
   
    Otherwise, data quality looks good.  Phases are doing what we would 
expect to see with these baselines and configuration. 

    At C-Band:

    *  Antennas 19 and 21 don't have receivers -- this has been 
correctly caught by the flagger.
    *  Antenna 18's demise (noted above) was *not* caught by the flagger 
at this band! 
    *  Whatever caused the flagger to dump on 6, 7, and 22 for L-band 
didn't do so at C-band.  Data are good, and are flagged as such. 
    * Antenna 14 is dead, and is correctly flagged as such. 
    * Antenna 13 comes and goes -- and the flagger appears to be 
tracking this.