[evlatests] P-band Switched Cal situation

[Rick Perley]

    From the test last night, and looking only at a middle spectral 
window (344 MHz).  PSum values were arranged to be at 14 counts. 

    1)  Cals not switching (or non-functioning noise diode):  ea13 and 
ea25 on both polarizations. 

    2) Cals very weak (< 0.2 counts):  ea02 in LCP, ea19 in LCP, ea06 in 
RCP, ea12 in RCP.  Note that ea06 and ea12 have very weak fringes also, 
so the cals are probably o.k.   ea02 in LCP is the worst of these by far 
(barely above zero), so should get priority. 

    3) Cals very strong (> 1.5 counts):  ea04 in both polarizations, 
ea18 in LCP, ea02 in RCP.  (Note that ea02 has nearly no cal in LCP, so 
perhaps all the cal power is getting into RCP ...)