[evlatests] Bad SPW

[Ken Sowinski]

On Fri, 30 Jun 2023, Rick Perley wrote:

> And I can confirm the problem (no correlations in SPW44, in Ku-band, for ea17 
> only, on all polarizations) is still with us.

Just to be clear, does "all polarizations" means both pols of all If pairs
or just both pairs of one IF pair?

Ken


> On 6/30/23 12:03, Ken Sowinski wrote:
>>  On Thu, 29 Jun 2023, Rick Perley via evlatests wrote:
>>
>>>  In reducing some data  taken over the past week or so, I note that a
>>>  single spectral window, at Ku, K, and Ka bands, gives only noise -- no
>>>  coherent signal visible in either polarization.
>>>
>>>  The SPW is:  #44 in Ku band
>>>
>>>  and              #21 in both K and Ka bands.
>>>
>>>  The problem is not need in the low frequency bands (L though Ku).  Q-band
>>>  was not observed.
>>>
>>>  The problem was in every database taken since june 22.
>>
>>  This didn't get as much attention as your complaint about ea27.
>>
>>  If, as it appears, this affects all antennas then it sounds like
>>  a bad, or misconfigured, baselineboard.  Other possibilities are
>>  the network switch or CBE, but a bad blb is much more likely.
>>
>>  Ken
>
>