[evlatests] Failures to tune, in spectral line

[Rick Perley]

    I've reviewed the data quality in the spectral line mode.  There 
were 315 separate observations, each one minute long, at ten different 
frequencies, all in 12.5 MHz BW, in correlator mode 'PB'. 

    Of these 315 observations, we had only 6 scans in which one antenna 
failed to provide good data.  Five of these were with antenna 14, the 
other with antenna 24.  For all six instances, the system flagger caught 
the problem -- hence it appears these failures are not the same as those 
which afflict the A and C IFs (which I reported on from the continuum 
observations, earlier this morning). 

    On curiosity in the flagged data -- for 5 of the six instances, one 
single bad record -- at the beginning of the scan -- escaped flagging.