[evlatests] Q-band results

[Rick Perley]

    .. and finally, Q-band. 

    Only antenna 14 has a Q-band receiver.

    In short, it works very, very well indeed!

    A)  Fast Continuum:

       10-second amplitude drops (of the 50% loss flavor) were seen on 3C84.

       There were no phase spins.

       Phase stability was exactly as expected for atmospherics, judging 
by the
phase of the neighbor antenna,  *except* that we had a  150 degree phase
jump on IFs 14B and 14D. 

       Amplitude gain stability was as good or better than the VLA 
antennas. 

       The back-end system temperature was fixed at 6.3K -- it never changed
throughout. 

       Sensitivity:  The rms noise on cold sky, following calibration on 
3C84,
showed a loss by the usual 10 to 20% compared to good VLA antennas. 
       *** This loss factor seems universal to all bands ***

    B) Line Mode: 

    Everything behaved normally.  No spins, no drops.  Good stuff.