From: Chuck Harris <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] Ultra low phase noise floor measurement system forRF
devices.
Date: Sun, 01 Apr 2007 14:14:02 -0400
Message-ID: <[EMAIL PROTECTED]>
> Poul-Henning Kamp wrote:
> > In message <[EMAIL PROTECTED]>, Chuck Harr
Bob Paddock wrote:
> On Sunday 01 April 2007 11:30, Chuck Harris wrote:
>
>> Metric vs. English has nothing to do with making things easier, but
>> rather has everything to do with which arbitrary constants you prefer.
>
> Here is a question that has nagged me for years, but first
> the backgroun
Poul-Henning Kamp wrote:
> In message <[EMAIL PROTECTED]>, Chuck Harris writes:
>
>> We can play that game Poul-Henning, by using joules, one thing becomes easy,
>> and another becomes hard, but in the end, you always have to return to
>> remembering
>> arbitrary constants.
>
> That's likely to
In message <[EMAIL PROTECTED]>, Chuck Harris writes:
>We can play that game Poul-Henning, by using joules, one thing becomes easy,
>and another becomes hard, but in the end, you always have to return to
>remembering
>arbitrary constants.
That's likely to be a matter of fact for any universe :-)
Poul-Henning Kamp wrote:
> In message <[EMAIL PROTECTED]>, Chuck Harris writes:
>
>> It is no more, or less, arbitrary than the calorie, but it is a whole lot
>> less
>> wierd than a calorie/hour, or a kilometer/hour for that matter.
>
> You're right, BTU/h is just as arbitrary as the calorie, w
From: "Poul-Henning Kamp" <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] Ultra low phase noise floor measurement system forRF
devices.
Date: Sun, 01 Apr 2007 14:50:28 +
Message-ID: <[EMAIL PROTECTED]>
> In message <[EMAIL PROTECTED]>, Chuck Harris write
In message <[EMAIL PROTECTED]>, Chuck Harris writes:
>It is no more, or less, arbitrary than the calorie, but it is a whole lot less
>wierd than a calorie/hour, or a kilometer/hour for that matter.
You're right, BTU/h is just as arbitrary as the calorie, which is why
the correct SI unit for energ
Didier Juges wrote:
> In France, and I suspect in the rest of the world, machinists talk in
> 1/100th of a mm (centieme in French). The 'centieme' is a very good
> fractional unit when dealing with hardware. It is not harder to talk in
> 1/100th of a mm than in 1/1000th of an inch.
Talking isn
In France, and I suspect in the rest of the world, machinists talk in
1/100th of a mm (centieme in French). The 'centieme' is a very good
fractional unit when dealing with hardware. It is not harder to talk in
1/100th of a mm than in 1/1000th of an inch. The micrometre (micron in
French, as you
The other reason the machinists aren't thrilled with SI units is that
thousandths of an inch are actually a pretty good match for the precision
they usually deal with. In SI, you'd have to deal with micrometers
(microns?), which is too much resolution for most applications, or
millimeters, which i
> Mike
>
> It actually measures the additive phase noise of components
> (amplifiers, splitters, transformers etc.).
> Since it uses a cross correlation technique it can easily achieve a
> noise floor below the thermal noise.
> Cancellation of the carrier in the interferometer/bridge allows us
Mike Feher wrote:
> Well, I must admit I did not read the referenced article, but, he is talking
> about dBc, or relative to the carrier and not kT. So, if the carrier power
> is high enough I suppose it could be done. Even suppose you could measure
> it, what would it take to generate such a pure
In a message dated 3/30/2007 10:27:10 Pacific Daylight Time,
[EMAIL PROTECTED] writes:
Even suppose you could measure
it, what would it take to generate such a pure carrier. That may even be
more difficult. -
Yup, I agree. That's a lot of dB's...
bye,
Said
**
phase noise floor measurement system
forRF devices.
In a message dated 3/29/2007 21:33:44 Pacific Daylight Time,
[EMAIL PROTECTED] writes:
_http://arxiv.org/PS_cache/physics/pdf/0503/0503015.pdf_
(http://arxiv.org/PS_cache/physics/pdf/0503/0503015.pdf)
Hi Bruce,
Isn't a -200dBc/Hz
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