[evlatests] [Fwd: next installment of 3 bit data]

[Rick Perley]

    Ken swapped the data paths in the station board. 

    The result of this is that the noise statistics swapped 
polarizations -- the rms noise in LCP is now much higher, the noise in 
RCP is much lower.  The problem then lies upstream of this swap. 

    What's next?

    Rick

-------- Original Message --------
Subject: 	next installment of 3 bit data
Date: 	Fri, 3 Sep 2010 14:16:39 -0600 (MDT)
From: 	Ken Sowinski <ksowinsk at aoc.nrao.edu>
To: 	Vivek Dhawan <vdhawan at aoc.nrao.edu>, Rick Perley 
<rperley at aoc.nrao.edu>



This time I adjusted the downconverter attenuators to achieve
optimal smapler RMS, and then swapped the data paths in the
station board input chips.  This has the effect of sending
IF A data down the path formerly used by IF C and vice versa.

ea27 was working this time!

1939  begin script
1948  finished adjusting gains
1951  finished swapping paths
2011  stopped script


Ken