[evlatests] More on L-Band Jumps
Rick Perley
rperley at nrao.edu
Tue Feb 20 19:27:50 EST 2007
The experiment run today was identical to that run Feb 7, except
that I cycled amongst 5 frequencies today, and 7 frequencies on Feb 7.
The results for the AC IF pair are identical for these two tests:
The phase advances by 72 (plus/minus 1) degrees upon returning to the
same frequency. Occasionally, 180 degrees is added to this.
But, the results of the BD IF pair are *not* the same. On Feb 7,
the phase was retarded by -40 degrees upon returning to the same
frequency (once every 7 minutes), while today, the phase was retarded by
-72 degrees. (As for AC, there is an occasional 180 degree jump
added). I have reviewed the Feb 7 data, and the difference is real!
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