[evlatests] phase jumps at scan boundaries

Eric Chavez echavez at nrao.edu
Tue Mar 20 12:57:13 EDT 2012


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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