[time-nuts] Re: 5071A Zeeman frequency querry

[Magnus Danielson]

Hi Tom,

Yeah, I know the 5071A servos the Zeeman frequency to achieve the 
C-field. I think FTS was the first to do that in commercial cesiums on 
the FTS-4040. Fun patent to read.

Thanks for the paper. I think I've seen it swosh by some time back.

Currently updating my python script to log a 5071A into an InfluxDB 
database. That and a few other things will be logged with a RPi for an 
experiment. I've done it similarly for my EFOS-B masers.

I got all the fields in SYST:PRINT? pulled in now, so getting that 
record along with additional environmentals and measurements should be 
helpful. As always, additional Grafana views ends up being added along 
the way.

Cheers,
Magnus

On 2023-06-25 21:27, Tom Van Baak via time-nuts wrote:
> It's in SYST:PRINT? of course, but with no separate SCPI query. It's a 
> factory constant of the tube and doesn't vary during operation. The 
> 5071A CBT uses a C-field of 0.057 Gauss which corresponds to a Zeeman 
> frequency of 39949 Hz.
>
> For examples of logging see:
>
> http://time.kinali.ch/ptti/1997papers/Vol%2029_06.pdf
>
> different version, same paper:
>
> https://apps.dtic.mil/sti/pdfs/ADA508048.pdf
>
> /tvb
>
>
> On 6/25/2023 11:43 AM, Magnus Danielson via time-nuts wrote:
>> Fellow time-nuts,
>>
>> Do any of you happen to know what is the SCPI querry to get the 
>> Zeeman frequency reading as a separate reading?
>>
>> When doing the SYST:PRINT? I get a read-out, and I have been able to 
>> establish the separate read-outs for all other fields there, but not 
>> the Zeeman frequency. Even looking in the online manual does not give 
>> it away.
>>
>> I am setting up a polling of 5071A into a database, so I wanted to 
>> grab everything of interest. If this number moves around at times, I 
>> want to grab it.
>>
>> Cheers,
>> Magnus
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