[evlatests] L-band EVLA

[Rob Long]

The operator complained about ant 4 L-band (on IFs B/D) this morning and 
when I took a look, the RMS values for both B and D were high (48 and 24 
respectively).  When I adjusted the T304 B and D attenuators, levels 
came into line and the antenna started working.  After looking at 
several antennas, it appears that B/D RMS levels are high on most 
antennas.  RFI looked about normal so I assume that the difference is 
that we are not using default LO freqs.

I also saw a couple of L302's that didn't seem to like the freq. 
14087.772 as they would not stay locked reliably.  I will look into the 
L302s today.

Rob