[evlatests] Origin of Antenna Polarization

[Ken Sowinski]

On Tue, 19 Apr 2022, Rick Perley via evlatests wrote:

> There is broad similarity in the traces, but also remarkable differences of 
> up to 4% in amplitude, and perhaps 20 degrees in phase.  Presumably, 
> different reflections within the T304's signal paths for 3 and 8 bit are 
> responsible for the polarization differences.

Or in the sampler.  Remember that both polarizations of each baseband
pair are processed in the same sampler module.


> Note also the very high cross-polarization -- about 12% at the lower 
> frequencies.