[time-nuts] Thunderbolt test results

[Donal G]

Thanks Guys,

I will have a look what ye said and try something the start of next week.
I have reattached the plot as a GiF - its abit easier to read this time.

Regards
Donal

On Fri, Jun 11, 2010 at 3:24 PM, Bob Camp <lists at rtty.us> wrote:

> Hi
>
> Ok, then the TBolt is running 100 to 200 ns for a tau of 12 seconds to 280K
> seconds.
>
> Without looking at the raw data it's tough to see what's going on. The
> numbers are 5 to 10X worse than I would have expected them to  be.
>
> One of the monitor programs (like Lady Heather) might be useful in
> diagnosing any issues you may have.
>
> Bob
>
> On Jun 11, 2010, at 9:29 AM, Peter Vince wrote:
>
> > HI Bob,
> >
> >     10 nanoseconds at the bottom, up to 10 microseconds at the top,
> > in three logarithmic sections.
> >
> > Donal: Is the time-constant at its default of 100 seconds, and was the
> > above plot taken shortly after turning it on?  There has been lots of
> > talk on here about tweaking the performance.  Increasing the
> > time-constant to between 500 and 1000 seconds should help, as will
> > stabilising the environmental temperature.  Let it run for a few
> > weeks, and the oscillator will settle down, and you should get some
> > better results.
> >
> >     TTFN,
> >
> >          Peter
> >
> >
> > On 11 June 2010 14:20, Bob Camp <lists at rtty.us> wrote:
> >> Hi
> >>
> >> The vertical axis on the plot is pretty tough to read. What is the
> scale?
> >>
> >> Bob
> >>
> >> On Jun 11, 2010, at 8:43 AM, Donal G wrote:
> >>
> >>> Hi Guys,
> >>>
> >>> I bought a Thunderbolt device recently.  I have done some
> >>> 10Mhz frequency tests in comparison to a Cesium reference.
> >>> Attached is MTIE plot.  Have any of you done similar tests? any comment
> on
> >>> my results?, is this normal operation when locked to the GPS?  I was
> >>> expecting better results that this!
> >>>
> >>> Thanks
> >>> Donal
> >>> <TBOLT -MTIE-small.JPG>_______________________________________________
> >>> 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.
> >>
> >> ______________________________________________________________________
> >> This email has been scanned by the MessageLabs Email Security System.
> >> For more information please visit http://www.messagelabs.com/email
> >> ______________________________________________________________________
> >>
> >
> > _______________________________________________
> > 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.
>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: MTIE-GIF.gif
Type: image/gif
Size: 49226 bytes
Desc: not available
URL: <http://febo.com/pipermail/time-nuts_lists.febo.com/attachments/20100611/44da017d/attachment.gif>