[evlatests] phase jumps at scan boundaries
Eric Chavez
echavez at nrao.edu
Wed Mar 28 12:37:42 EDT 2012
We did some cable installs in to these antennas. Can anyone tell me if
the problem still exists? If the problem is still there, we can swap the
synthesizer next.
Eric
Eric Chavez wrote:
> Jim,
>
> That would be great,
>
> Thank you,
>
> Eric
>
> Jim Ogle wrote:
>> Do you want a maint form generated for it?
>>
>> Jim
>>
>>> LO/IF will install some cabling to prevent this on maintenance day.
>>>
>>> Eric
>>>
>>> Bryan Butler wrote:
>>>> josh also reported phase jumps on the same antennas & IFs at scan
>>>> boundaries at C-band on 12 march. from his JIRA ticket:
>>>>
>>>> Summary: ea04, ea09 AC, ea02 BD.
>>>>
>>>> so, looks like this is consistent. is this written up into a
>>>> mainsaver ticket? the engineers should go out and have a look.
>>>>
>>>> -bryan
>>>>
>>>>
>>>> Emmanuel Momjian wrote, On 3/20/12 10:42 AM:
>>>>> The following antennas and IF pairs are showing phase jumps at scan
>>>>> boundaries (as seen in L-band and C-band data taken on March 13):
>>>>>
>>>>> Antenna ea02 IFs BD
>>>>> Antenna ea04 IFs AC
>>>>> Antenna ea09 IFs AC
>>>>>
>>>>>
>>>>> Emmanuel
>>>>>
>>>>>
>>>>>
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