[evlatests] A few other SY issues

[Rick Perley]

    (I promise to stop bombarding this list with these things for the 
rest of the day ...)

    A few other oddities were noted in today's short test:

    L-Band:

    Antennas 6 and 15, in the BD IFS had very low power (both PSum and 
PDif).  The former about half of normal, the latter about 1/30 of normal. 

    C-Band:

    Antenna 4, IF 'C' has power about 1/10 of the normal value.
    Antenna 16, IF 'D' changed its power level by a factor of 5 midway 
through the test.  This also happened -- twice -- at X-band (data taken 
at a different time).  Were we not in 'set and keep' mode (and even if 
we weren't how could these power levels change so often and by such 
large amounts?
    Antenna 18, IFs 'A' and 'C'.  Both PSum and PDif are too noisy -- by 
factors of hundreds, if not thousands!!!!!

    X-Band:

    Antenna 11:  A very strange situation -- the PSum values are too 
noisy by a factor of at least 100.  But the PDif values look perfectly 
good... 
    Antenna 13:  The noise diodes did not go on and off for this antenna 
as they did for all others.  Instead of a half dozen transitions (seen 
on all other antennas), this one transitioned only once...