[time-nuts] Convert ADEV specs to MDEV?

Magnus Danielson magnus at rubidium.dyndns.org
Sun Apr 24 02:13:30 EDT 2016


Hi,

Well, there is differences in level, there is tables for it, so while on 
the large scale they are close, they are not the same.

Vernotte have a table of it in one of the PVAR articles for instance.

Cheers,
Magnus

On 04/23/2016 02:15 PM, Bob Camp wrote:
> Hi
>
> The intended purpose of MDEV was to supply a plot that looked the same as an ADEV
> plot *except* for separating flicker phase. To the extent they succeeded, you can use
> the same plot on either one. (and as long as flicker phase is not an issue). To the extent
> they failed, you are stuck.
>
> Bob
>
>> On Apr 23, 2016, at 12:58 AM, Magnus Danielson <magnus at rubidium.dyndns.org> wrote:
>>
>> Hi,
>>
>> On 04/23/2016 02:54 AM, Stewart Cobb wrote:
>>> TimeLab can show "mask" overlays on various plots. It comes with a set of
>>> ADEV masks for cesium clocks, derived from the manufacturer's
>>> specifications for those clocks.
>>>
>>> Those masks don't show up on MDEV plots, because the manufacturers don't
>>> provide MDEV specs.
>>>
>>> For the mathematicians out there: is there a way to convert ADEV specs into
>>> equivalent MDEV specs?
>>>
>>> If not, does anyone have good measured MDEV data on any of the popular
>>> cesium clocks?
>>
>> The slopes of ADEV for the different noises can be converted to slopes in MDEV. It is the separation of white phase modulation and flicker phase modulation that doesn't go very well with ADEV, but works in MDEV, but if you ignore the flicker then you should be able to translate without too much difficulty.
>>
>> Good luck!
>>
>> Cheers,
>> Magnus
>> _______________________________________________
>> time-nuts mailing list -- time-nuts at febo.com
>> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>


More information about the time-nuts mailing list