[evlatests] Bad SPW

[Rick Perley]

In reducing some data  taken over the past week or so, I note that a 
single spectral window, at Ku, K, and Ka bands, gives only noise -- no 
coherent signal visible in either polarization.

The SPW is:  #44 in Ku band

and              #21 in both K and Ka bands.

The problem is not need in the low frequency bands (L though Ku).  
Q-band was not observed.

The problem was in every database taken since june 22.

Rick