[evlatests] Standing Wave in IF 'A'
Eric Chavez
echavez at nrao.edu
Tue Apr 19 15:21:36 EDT 2011
I just came from ant 22 and swapped the entire signal path between D301
and D302. We wiggled cables connectors etc and the problem was always in
IF-A. I talked to Kerry Shores while doing this test and I am convinced
that the problem is between the input to the D301 and the correlator. No
matter what I tried in the LO/IF path, the ripple always stayed the same
in IF-A.
Rob Long
Rick Perley wrote:
> Bandpass solutions at L, S, and X bands show a 32 MHz-period
> periodicity, of amplitude 1.5 dB, in IF 'A' only. Presumably, a bad
> match in the T304?
>
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