[time-nuts] Omega counters and Parabolic Variance (PVAR)

[Chuck Harris]

Hi Magnus,

John, et al, did such a nice job of making us a hammer for our 5370's, that
it has the rest of us searching for nails.

Maybe this could be a good place to start?

-Chuck Harris

Magnus Danielson wrote:
> Hi Chuck,
>
> On 07/14/2015 07:46 PM, Chuck Harris wrote:
>> Hi Magnus,
>>
>> Am I understanding correctly that the difference between Pi, Delta, and
>> Omega
>> is basically one of software processing after the sample is made?
>
> Correct!
>
>> If so, how can this be best leveraged by those of us that have 5370A/B
>> counters
>> that are running John Seamon's enhanced BBB processor in place of the
>> original
>> 5370 Motorola processor?
>
> I would stream the raw samples over to the computer and do processing there. Doing
> the Delta/Lambda estimation works if the computer side does the right post-processing
> (which they rarely do).
>
> Implementing this for "frequency only" in the BBB would not be too hard if you like
> to do that.
>
> I need to install my BBB board one of these days.
>
> Cheers,
> Magnus