[time-nuts] Modified Total Deviation calculation

[John Miles]

No; so far, everyone (including myself) has had to rely on Mark's generous
and informative tech support. :)

-- john

> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com]On
> Behalf Of SAL CORNACCHIA
> Sent: Thursday, January 21, 2010 7:41 AM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Modified Total Deviation calculation
>
>
> Hi John Miles,
>  
> Is there an instruction manual available for LadyHeather to
> interpret the displayed values like PPS, and other values.
> Thank You for making such valuable software available to everyone.
>  Best regards,
>
> Sal C. Cornacchia
> Electronic RF Microwave Engineer (Ret.)
>
>
>
>
>
>
>
> ________________________________
> From: Magnus Danielson <magnus at rubidium.dyndns.org>
> To: Discussion of precise time and frequency measurement
> <time-nuts at febo.com>
> Sent: Thu, January 21, 2010 5:39:05 AM
> Subject: Re: [time-nuts] Modified Total Deviation calculation
>
> John Miles wrote:
> >> John Miles wrote:
> >>> If you'd like to make the C source available, I'll look at building an
> >>> incremental version...?
> >> If you can accept the current quick-hack state of the code (yes, I am
> >> not too proud of the cleanness, so no comments about coding
> style or the
> >> general uglyness), find it attached. The main goal of this code is
> >> correctness. Find it attached.
> >>
> >> I'll hacking away further.
> >>
> >> An incremental version is a trivial extention for MTOTDEV as the outer
> >> loop steps the 3*m sample window over the data-samples...
> >
> > Thanks very much, Magnus -- this code will come in handy.  I
> should be able
> > to get an incremental version into the next TI.CPP beta.
>
> My intention was to create incremental versions later on. Most of
> these allow for incremental versions, so it should not be too
> hard. Do use the test-sequence and check against the listed
> values so that you know that the algorithm does what you think it
> does. Verify your implementations!
>
> I've implemented the Theo-variants, MTIE and TIErms also. But I
> have not verified them as there is no correct values.
>
> In the process I'e discovered an error in SP1065 relating to Time
> Total Variance (and thus Deviation). The factor of tau^3/3 should
> be tau^2/3.
> The author was unaware of it, confirmed it and forwarded the info
> such that next printing can be correct.
>
> Cheers,
> Magnus
>
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