[evlatests] Bad SPW
Rick Perley
rperley at nrao.edu
Fri Jun 30 16:23:16 EDT 2023
And I can confirm the problem (no correlations in SPW44, in Ku-band, for
ea17 only, on all polarizations) is still with us.
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
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