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Discussion of precise time and frequency measurement

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Plot phase noise spectrum from DMTD measurement?

M
mikes@flatsurface.com
Sun, Mar 13, 2011 3:02 AM

At 09:51 PM 3/12/2011, Said Jackson wrote...

Yes, the TI will get more accurate with time. But the setup suggested
in previous email doesn't measure TI.

No, it's basically one step of the self-testing steps in the manual.
Measuring the jitter of the unit's own clock isn't particularly useful
or interesting for anything other than checking for proper operation.

I know what a standard deviation is.

At 09:51 PM 3/12/2011, Said Jackson wrote... >Yes, the TI will get more accurate with time. But the setup suggested >in previous email doesn't measure TI. No, it's basically one step of the self-testing steps in the manual. Measuring the jitter of the unit's own clock isn't particularly useful or interesting for anything other than checking for proper operation. I know what a standard deviation is.
JN
Jean-Louis Noel
Sun, Mar 13, 2011 10:32 AM

Hi,

From: "Mike S" mikes@flatsurface.com

Measuring the jitter of the unit's own clock isn't particularly useful or
interesting for anything other than checking for proper operation.

I agree for the purpose, but the noise mesured is not only the clock noise.
It's the sum of all noises. Not only the clock, 200MHz multiplier and input
circuits but the whole chain is tested. The first three are surely the most
noisiest.

Bye,
Jean-Louis

Hi, From: "Mike S" <mikes@flatsurface.com> > Measuring the jitter of the unit's own clock isn't particularly useful or > interesting for anything other than checking for proper operation. I agree for the purpose, but the noise mesured is not only the clock noise. It's the sum of all noises. Not only the clock, 200MHz multiplier and input circuits but the whole chain is tested. The first three are surely the most noisiest. Bye, Jean-Louis