In message <[EMAIL PROTECTED]>, Hal Murr
ay writes:
>How do I setup 2 clocks so they are ticking within 1 ns of eachother?
>
>[...]
>
>One approach is to make a symmetrical setup: send your signal to the other
>site, compare the signal from the other site with yours, adjust one knob
>(pick one)
> With the fibre-based two-way time transfer. For shorter distances you
> can do well on coax, but for the distance range you require you really
> want to go fibre. That world is a bit different but can be made sense
> off.
How do I setup 2 clocks so they are ticking within 1 ns of eachother?
I
From: "Stephan Sandenbergh" <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] Dithering vs. locking all the clocks to the OCXO?
Date: Tue, 4 Jul 2006 23:33:39 +0200
Message-ID: <[EMAIL PROTECTED]>
> >On 7/4/06, Magnus Danielson <[EMAIL PROTECTED]> wrote:
>
>
From: "Bill Hawkins" <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] Dithering vs. locking all the clocks to the OCXO?
Date: Tue, 4 Jul 2006 12:18:34 -0500
Message-ID: <[EMAIL PROTECTED]>
> > However, a quick guess would be the delay caused by atmospheric effects (I
&
>On 7/4/06, Magnus Danielson <[EMAIL PROTECTED]> wrote:
>Actually, for these distances, pulling some fibre and do two-way time transfer
>should not be too hard. Acheiving sub-nanosecond relative timing should not at
>all be unfeasable but should rather be consider fairly easy.
Do you mean easy fo
On Tue, July 4, 2006 19:18, Bill Hawkins said:
> What causes the "atmospheric effects"? I'd expect radiation to
> slow down a bit as it passes through water. Are there heat
> effects as well? Does the density of the atmosphere change
> enough to make a 10E-10 second delay possible? If so, it
> see
> However, a quick guess would be the delay caused by atmospheric effects (I
> don't think thermal noise would play a big role since the antenna is
looking
> straight up).
Seems to me that thermal noise depends only on the resistive
impedance of the antenna and input circuit. See Johnson
noise. Or
From: "Robert Lutwak" <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] Dithering vs. locking all the clocks to the OCXO?
Date: Tue, 4 Jul 2006 10:34:01 -0400
Message-ID: <[EMAIL PROTECTED]>
> Are these permanent installations or portable? If portable, how quickly do
> th
sonal)
(339) 927-7896 Mobile
- Original Message -
From: "Stephan Sandenbergh" <[EMAIL PROTECTED]>
To:
Sent: Tuesday, July 04, 2006 8:49 AM
Subject: [time-nuts] Dithering vs. locking all the clocks to the OCXO?
> Hi All,
>
> Earlier, I explained that my applicat
From: "Stephan Sandenbergh" <[EMAIL PROTECTED]>
Subject: [time-nuts] Dithering vs. locking all the clocks to the OCXO?
Date: Tue, 4 Jul 2006 14:49:19 +0200
Message-ID: <[EMAIL PROTECTED]>
> Hi All,
>
> Earlier, I explained that my application require very go
Hi All,
Earlier, I explained that my application require very good relative
stability between various GPSDOs.
A rough estimate of my requirements is:
-Baselines of 100s of meters to 10s of kilometres.
-Sub-nanosecond relative stability (this I forgot to mention earlier -
thanks to TvB for remi
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