[evlatests] Strange Phase Behavior for ea22

Rick Perley rperley at nrao.edu
Thu Feb 27 16:47:01 EST 2020


     We'll be doing a few more beam cuts in the near future, so I'll 
have the opportunity to see if this solves the problem.

     Rick

On 2/27/20 2:25 PM, Vivek Dhawan via evlatests wrote:
> Thanks,
>
> ea22 looks stable now. But it was not misbehaving continuously
> even before that. We will keep and eye on it.
>
> Vivek.
>
> On Thu, February 27, 2020 12:59, Leon Abeyta via evlatests wrote:
> | I just had Jerry back off by 6 dB. Delays will need to be set. Hope this
> | helps the problem.
> |
> | Leon
> |
> | On 2/27/2020 10:26 AM, Vivek Dhawan via evlatests wrote:
> |> Thanks Leon,
> |>
> |> Today is a test, day if someone is available. Monday or Wednesday next
> |> week also would work.
> |>
> |> On 2/27/20 9:13 AM, Leon Abeyta via evlatests wrote:
> |>> I noticed that the L305 in ea22 is being over-driven by a few dB. If
> |>> anyone is interested, I can investigate fixing that on a maintenance day.
> |>>
> |>> Leon Abeyta
> |>>
> |>> On 2/26/2020 10:34 AM, Rick Perley via evlatests wrote:
> |>>>  Â Â Â  Beam cuts were taken last night, as part of our optics
> |>>> alignment program.    Bands observed were from X through Q.
> |>>> Stability was exceptional (as we might expect on a cold, clear, calm
> |>>> night).
> |>>>
> |>>>  Â Â Â  All antennas behaved exceptionally well, except one.ÂÂ
> |>>> ea22
> |>>> has phase oscillations many times larger than they should be.
> |>>>
> |>
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