> But something bugs me... In both fountains and single
> ion mercury standards, lasers are used to COOL DOWN
> atoms...
>
> How is it possible? Lasers are energy sources, and (at
> least for me), anything that is hit by a laser will
> get warm, not cold!
>
> Thanks for your attention..
>
> Norm
In message <[EMAIL PROTECTED]>, "Rick K
arlquist" writes:
>I can also tell you (having investigated this sort of thing)
>that adding varactors to the cavity to tune it is a huge can of
>worms that you want to avoid if at all possible.
Apart from being a can of worms, wouldn't it also be pointless
Magnus Danielson wrote:
> What I have been thinking about is the possibility to electrically detune
> the
> microwave cavity to introduce the necessary phase shift control. The key
> issue
> with that would probably be how to detect the zero-phase shift in a
> separate
> loop not involving external
From: "Rick Karlquist" <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] Frequency processing scheme of HP5065 vapour rubidium
standard
Date: Tue, 7 Nov 2006 10:29:49 -0800 (PST)
Message-ID: <[EMAIL PROTECTED]>
> Magnus Danielson wrote:
> > There is frequency pulling e
Magnus Danielson wrote:
> There is frequency pulling even in Cesium beams. Only a few beams handles
> the
> phase error pulling by reverting the beam direction. Fountains have this
> together with doppler reduction.
In the 5071, nearly every error source has been beaten into
submission. However,
From: Normand Martel <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] Frequency processing scheme of HP5065 vapour rubidium
standard
Date: Mon, 6 Nov 2006 16:28:47 -0800 (PST)
Message-ID: <[EMAIL PROTECTED]>
>
>
> --- Ulrich Bangert <[EMAIL PROTECTED]> wrote:
>
&g
vember 2006 17:12
>> An: Discussion of precise time and frequency measurement
>> Betreff: Re: [time-nuts] Frequency processing scheme of
>> HP5065 vapour rubidium standard
>>
>>
>> Ulrich Bangert wrote:
>>
>>
>>> Agreed! But you are t
--- Ulrich Bangert <[EMAIL PROTECTED]> wrote:
> John,
>
> > offset that changed annually. IIRC, it was
> typically something like
> > 300x10e-10.
>
> Agreed! And that is what the manual says its good
> for!
>
> However, the question remains why different physics
> packages need
> DIFFERENT
73 de Ulrich, DF6JB
> -Ursprüngliche Nachricht-
> Von: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] Im Auftrag von John Ackermann N8UR
> Gesendet: Montag, 6. November 2006 17:12
> An: Discussion of precise time and frequency measurement
> Betreff: Re: [time-nuts] Freque
From: John Ackermann N8UR <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] Frequency processing scheme of HP5065 vapour rubidium
standard
Date: Mon, 06 Nov 2006 11:11:56 -0500
Message-ID: <[EMAIL PROTECTED]>
> Ulrich Bangert wrote:
>
> > Agreed! But you are talking about t
Ulrich Bangert wrote:
> Agreed! But you are talking about things that happen INSIDE the physics
> package, don't you? Ok, let us assume that there WERE big differences in
> the physics packages that need to be compensated for. In THIS case the
> tunable synthesizer would indeed make sense and even
ftrag von Magnus Danielson
> Gesendet: Montag, 6. November 2006 16:01
> An: time-nuts@febo.com; [EMAIL PROTECTED]
> Betreff: Re: [time-nuts] Frequency processing scheme of
> HP5065 vapour rubidium standard
>
>
> From: "Poul-Henning Kamp" <[EMAIL PROTECTED]>
> S
From: "Poul-Henning Kamp" <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] Frequency processing scheme of HP5065 vapour rubidium
standard
Date: Mon, 06 Nov 2006 13:21:50 +
Message-ID: <[EMAIL PROTECTED]>
> In message <[EMAIL PROTECTED]>, "Ulrich Bangert&quo
In message <[EMAIL PROTECTED]>, "Ulrich Bangert" writes:
>But what surprises us completely is the fact that different physics
>packages need DIFFERENT thumbwheel settings to generate the SAME time
>scale as seen with the two devices available.
This is because rubidium vapour standards are not pr
Hi folks,
me and my friend Frank (who has got his hands on two of these HP5065)
have a problem in understanding the frequency processing scheme of these
beasts.
At a first glance everything looks pretty straightforward: A 60 MHz
carrier derived from the OCXO is multiplied by 114 to get a microwa
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