[evlatests] Bad SPW
Vivek Dhawan
vdhawan at nrao.edu
Sat Jul 1 19:03:01 EDT 2023
Rick, what is / are the project codes and dates - so we can track this
through
the various diagnostic records. this kind of thing: (random example here)
23A-043.sb44226372.eb44246734.60123.12411150463
there are some small broken things in WIDAR and CBE, details later. Fixes on
monday or next week anyway.
On 7/1/23 15:30, Ken Sowinski via evlatests wrote:
> 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
>>
>>
>
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