TVB's article was in the Harrisburg, PA Sunday Patriot-Times (page 23-front
section). It had a photo of the Atomichron - not TVB's lab as shown in the
link.
BR
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In message: <[EMAIL PROTECTED]>
Dr Bruce Griffiths <[EMAIL PROTECTED]> writes:
: The Allan deviation of current state of the art cryogenic sapphire
: oscillators is more than an order of magnitude lower than the noise
: floor of these instruments.
I'm curious. How much does one of t
Magnus Danielson wrote:
> From: [EMAIL PROTECTED]
> Subject: Re: [time-nuts] On some pitfalls of the dual mixer time
> differencemethod of h...
> Date: Sun, 1 Oct 2006 13:53:57 EDT
> Message-ID: <[EMAIL PROTECTED]>
>
>
>> Hello Ulrich,
>>
>
> Ulrich and Said,
>
>
>> the latest generatio
From: [EMAIL PROTECTED]
Subject: Re: [time-nuts] On some pitfalls of the dual mixer time
differencemethod of h...
Date: Sun, 1 Oct 2006 13:53:57 EDT
Message-ID: <[EMAIL PROTECTED]>
> Hello Ulrich,
Ulrich and Said,
> the latest generation of TSC intruments (the TSC5120A for example) uses a
> n
Hello Ulrich,
the latest generation of TSC intruments (the TSC5120A for example) uses a
new strategy: they use four ADC's to sample and cross-correlate two oscillators
completely in software. All the mixing etc is done in the software domain.
That makes for cheap hardware, and works quite
From: "Ulrich Bangert" <[EMAIL PROTECTED]>
Subject: [time-nuts] On some pitfalls of the dual mixer time difference method
of horology
Date: Sun, 1 Oct 2006 11:29:52 +0200
Message-ID: <[EMAIL PROTECTED]>
> Hi folks,
Ulrich,
> Now it seems we have really created the universal workhorse of horolog
Poul-Henning Kamp wrote:
> In message <[EMAIL PROTECTED]>, "Ulrich Bangert" writes:
>
>> Hello Paul-Henning,
>>
>> www.tmo.jpl.nasa.gov/progress_report/42-121/121G.pdf
>>
>> definitely uses no FFT but uses a theoreme from geometry to estimate the
>> signal's frequency and the rest is a two dimen
In message <[EMAIL PROTECTED]>, "Ulrich Bangert" writes:
>Hello Paul-Henning,
>
>www.tmo.jpl.nasa.gov/progress_report/42-121/121G.pdf
>
>definitely uses no FFT but uses a theoreme from geometry to estimate the
>signal's frequency and the rest is a two dimensional non-linear fit for
>amplitude and p
Hello Paul-Henning,
www.tmo.jpl.nasa.gov/progress_report/42-121/121G.pdf
definitely uses no FFT but uses a theoreme from geometry to estimate the
signal's frequency and the rest is a two dimensional non-linear fit for
amplitude and phase. But i am starting to understand how a FFT might be
helpful
In message <[EMAIL PROTECTED]>, "Ulrich Bangert" writes:
>> All the repeated steps of amplification/limiting to find the =
>> zero crossing can be almost entirely replaced by a a single FFT.
>
>If dsp methods are a choice one can even do better (at least for simple
>sines) as described by Mr. Gree
Hello Paul-Henning,
> I would find two of the best Audio ADCs I could lay my
> hands on. Some of these are incredibly good by any standard.
> Sampling the mixer outputs at approximately 96kHz with 16 bit
> effective resolution is well within the possible.
>
> All the repeated steps of amplific
I would find two of the best Audio ADCs I could lay my
hands on. Some of these are incredibly good by any standard.
Sampling the mixer outputs at approximately 96kHz with
16 bit effective resolution is well within the possible.
All the repeated steps of amplification/limiting to find the zero
cr
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