[evlatests] Alerts for T304 TPD levels

Rob Long rlong at nrao.edu
Tue Apr 5 11:24:18 EDT 2011


Problems with RFI at lower bands could still wreak havoc on the alert 
system possibly driving the operators crazy.

ROb

Keith Morris wrote:
> There is certainly the possibility of false alarm, but the cost of such 
> an alarm is quite low.  The TPD monitor point message field reports the 
> ALC status-- target reached, attenuator out of range, etc.  The alert 
> would inform the operator that such a situation exists; there may or may 
> not be any action the operator can take.  But in the cases where the 
> attenuators failed to set up properly, the benefit of having a second 
> chance of dialing in proper levels may outweigh the inconvenience of 
> false alarms.
> 
> 
> 
> Steven Durand wrote:
>> Is there the possibility of many false alarms.  The x-band receivers 
>> still have very low output.  Also at the edges of each band some of 
>> the receivers have low output that can not be adjusted to the proper 
>> level.
>>
>>
>>
>> Rob Long wrote:
>>> I discovered several T304 attenuators set incorrectly (again) this 
>>> morning. I wonder if we should setup alert levels on the TPD monitor 
>>> points in order to warn operators of a potential ALC problem. If the 
>>> operators knew of the problem, they might have been able to take 
>>> corrective action.
>>>
>>> I spoke with Dave who informed me that they didn't even realize the 
>>> attenuators were set incorrectly because they saw no fringe problems. 
>>> This email is effectively a channel to open communication concerning 
>>> ideas/solutions to this problem!
>>>
>>> Thanks,
>>> Rob Long
>>>
>>> _______________________________________________
>>> evlatests mailing list
>>> evlatests at listmgr.cv.nrao.edu
>>> http://listmgr.cv.nrao.edu/mailman/listinfo/evlatests
>>
> 




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