[evlatests] Broken switched power

[Rick Perley]

     A short calibration run was made early Tuesday morning.

     Some antennas/bands have non-functional switched power.  The list 
is short:

     1) At Ku-band, ea11D has all negative PDif.  The other IFs are 
fine.  The PSum value shows that this IF has a value about 100 times 
larger than it should be!  Other IFs are fine.

     2) At Ka-band, ea10, both C and D (i.e., left polarization) are 
'wild and crazy' values of PDif.  The PSum values are also completely wild.

     3) At Ka-band, ea27C has zero (noise only) values of PDif. Other 
IFs are fine.  The digital power PSum for all four IFs are normal.  
(This antenna/IF has been like this for quite some time ...)

     Overall, the usual characteristics for the high frequency bands are 
seen -- high variability in PDif (and gain) -- tens of percent,  over 
timescales of seconds to minutes due to my changing bands continuously.  
The low frequency bands (L through X) do not show this characteristic.