[evlatests] S band default frequencies

[David Harland]

Thanks; i'll update VLA setup in OPT to use those.

Barry Clark wrote:
> Assuming observers can remember something sensible to put in there
> seems a stretch.  Using the historical ones from Modcomp days
> sounds right.  They are captured in the parminator 'setup' entity.
> The code still exists in the Executor to use those, though that
> constructor is deprecated.
>
> David Harland wrote:
>   
>> I don't know how much it matters for the hardware config portion of the 
>> OPT, since users are expected to choose their own frequencies, but we do 
>> start w/ defaults & it would make sense to pick the same ones as are 
>> picked elsewhere. Right now i think for each band we default to the 
>> center of the nominal range of the bands. This is what i found using 
>> webtest <https://webtest.aoc.nrao.edu/rct>:
>>
>> 4 73.75MHz
>>
>> P 320.25MHz
>>
>> L 1.6GHz
>>
>> S 3.0
>>
>> C 6.0
>>
>> X 10.0
>>
>> Ku 15.0
>>
>> K 22.25
>>
>> Ka 33.25
>>
>> Q 45.0
>>
>> If anyone wants these adjusted, let me know the value to use for a 
>> particular band. Right now we use the same default frequency for IFs AC 
>> and BD. If that should not be the case, let me know the default freqs by 
>> band and IF.
>>
>> David
>>
>>
>> Ken Sowinski wrote:
>>     
>>> The satellite radio signals at 2300 MHz are strong ebough in LCP to
>>> seriously distort the attenuator settings in the down converters such
>>> that power as seen at the VLA T5s is much too low.  To avoid this
>>> I suggest moving the default S band frequencies for use with the
>>> old correlator from 3000 and 3050 MHz to 3500 and 3550 MHz.  This
>>> will move 2300 MHz out of the downconverter input filter bandpass.
>>>
>>> I can change the default frequencies in the parameters DB, but does
>>> anything else (such as obs2script) need to be changed as well?
>>> _______________________________________________
>>> evlatests mailing list
>>> evlatests at listmgr.cv.nrao.edu
>>> http://listmgr.cv.nrao.edu/mailman/listinfo/evlatests
>>>   
>>>       
>> _______________________________________________
>> evlatests mailing list
>> evlatests at listmgr.cv.nrao.edu
>> http://listmgr.cv.nrao.edu/mailman/listinfo/evlatests
>>     
> _______________________________________________
> evlatests mailing list
> evlatests at listmgr.cv.nrao.edu
> http://listmgr.cv.nrao.edu/mailman/listinfo/evlatests
>