[evlatests] Ka-band super-birdie

[Rick Perley]

    Ken ran the 'rfisurvey' script twice, using different LO settings, 
as noted below. 

    The 'superbirdie' moves with the LO:  the frequencies at which it is 
seen are as listed below in the setup description. 

    Along with this, we find a pair of weak birdies, seen only in RCP, 
and at both tunings in the same place:

    29492.7 and 29507.7 MHz. 

    What makes these interesting is that they are (almost) symmetrically 
placed about the subband boundary lying at 29500 MHz.  The first of 
these lies in subband 4, and second lies in subband 5, each about 7 MHz 
from the boundary.  It looks like an alias, but probably isn't, as they 
are of equal strength (about 3dB above the noise). 



-------- Original Message --------
Subject: 	Ka band super birdie
Date: 	Tue, 29 Mar 2011 15:12:59 -0600 (MDT)
From: 	Ken Sowinski <ksowinsk at aoc.nrao.edu>
To: 	Rick Perley <rperley at aoc.nrao.edu>, Michael Rupen 
<mrupen at aoc.nrao.edu>



Rick,

I run the Ka band part of the RFI survey twice.  The first should be
a repeat of what we have done before, the second should be with a
different tuning for the L301-1.

the first setting is  14720*2 = 29440
the second setting is 14976*2 = 29952

The file was called rfiKabirdie and should be available now in
the archive.

Ken