[time-nuts] Road-trip and rubidium fiddles

[Azelio Boriani]

OK, thanks for the clarifications.

On Mon, Apr 9, 2012 at 9:08 PM, Magnus Danielson <magnus at rubidium.dyndns.org
> wrote:

> On 04/09/2012 06:40 PM, Azelio Boriani wrote:
>
>> Interesting, now two questions:
>>
>>
>>  It is clear that the short term is limited by the instrument trigger
>>>
>> jitter. A mixer pre->scaling is clearly needed.
>>
>> that is, a mixing to take down the 10MHz to a lower frequency? Mixing with
>> a higher stability source?
>>
>
> As Attila so correctly commented, you use a Dual Mixer Time Difference
> solution to lower the measurement floor of a particular counter. You can
> also go below the noise of the transfer oscillator as it to some degree
> cancels in the cross correlation that the time difference measurement.
>
>  And,
>>
>>> I also gave a quick tour of just how much you can read out of the clock's
>>>
>> state and>status using the knob and voltmeter. Showing the locking in
>> process and such.
>> OK, my SR620 will arrive soon (it is actually in the Custom office to
>> compute the duties) but this tells me that the SR620 can measure with high
>> precision the incoming AC signal level? Why locking-in process? Has the
>> SR620 to lock-in the input signal source?
>>
>
> That comment where not on the SR620 but on the HP5065A. Congratulations on
> the SR620, hope you will enjoy it. Make sure to use TimeLab alongside it.
>
>  OK, maybe I have to study the SR620 manual first...
>>
>
> It's highly recommended regardless.
>
>
> Cheers,
> Magnus
>
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