[evlatests] More on noise from spectral line

[Ken Sowinski]

On Tue, 15 Apr 2008, Rick Perley wrote:

>    I recommend re-doing the test, but at X-band (where the background
> is less a problem, and the X-pol of the antennas much lower), and not
> including PA at 50 MHz.  Use 25 MHz instead.

Agreed, but I would like to keep the 50 MHz observation because
that is distinguished from the otheres by not using the
recirculators.  If four channels are to few include a single
IF observation at 12.5 MHz and 50 MHz.