[time-nuts] Mentorship needed in learning about Allan Deviation and variation.

[Bob kb8tq]

Hi

Are you using sawtooth correction?

Bob

> On Nov 10, 2020, at 8:55 AM, Joe & Gisela Noci <jgnoci at gmail.com> wrote:
> 
> Hi everyone,
> Still playing with my GPSDO..The Rubidium source I was hoping to have the
> loan off did not work out, so still in the dark. I have sort of convinced
> myself to procure a reasonable 'proven' source, Rubidium or whatever, but
> that
> seems to be more easily decided than done..Or at least so if the money
> available is not astronomical... Also complicated by the difficulties
> getting the goods here to Namibia!
> 
> Anyway, I am still unhappy with my analogue time-to-digital conversion - I
> do see the odd spike in the logged data and have been unable to find why -
> have applied lots of filtering of supplies, used a separate A/D convertor (
> as opposed to the convertor internal to the STM Processor) with own dc
> regulated supply, own clean A/D Reference voltage ( 1ppm device). etc...
> 
> Does not mean implementing a digital method will get rid of the spikes, so
> I am still chasing that till I understand, but to that end:
> I found this device and am keen to get the dev kit and try it out :
> https://www.sciosense.com/products/time-to-digital-converters/development-kit-for-as6500/
> 
> Has anyone perhaps played with it? Would be interested to know more about
> it if so..
> Regards
> Joe
> V51JN / ZS6JGN
> 
> On Wed, Oct 28, 2020 at 7:08 PM Alberto di Bene <dibene at usa.net> wrote:
> 
>> On 2020-10-28 2:29, jimlux wrote:
>>> I'm still agitating for alien deviation - Microsoft offers it as a
>>> suggestion, but not Allan, so it must be true.
>> 
>> :-):-):-)
>> 
>> Thanks Tom and Jim for the explanations. All clear now.
>> 
>> 73  Alberto  I2PHD
>> 
>> 
>> 
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