[evlatests] ea28 L-band Polarizer

[Wes Grammer]

That definitely sounds like a receiver issue, either with the OMT or 
(more likely) the quad hybrid coupler that immediately follows it. This 
L-band should come back to the lab for evaluation and repair.

On 3/12/2022 12:40 PM, Frank Schinzel via evlatests wrote:
> I second this observation. I have been seeing this behavior of ea28 at 
> L-band in 5 independent observations since February 26.
>
> On 3/12/2022 12:19 PM, Rick Perley via evlatests wrote:
>> Something is seriously amiss with the L-band polarizer in ea28.
>>
>> Normal cross-polarizations are typically 5%, and never more than 
>> 10%.  For ea28, these values are seen above 1300 MHz, but below this, 
>> the cross-polarization rises quickly to more than 50% at 1050 MHz.
>>
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