[SI-LIST] Re: What is 'Integrated RMS jitter' and how is it measured
- From: <marcus_mueller2@xxxxxxxxxxx>
- To: <si-list@xxxxxxxxxxxxx>
- Date: Wed, 11 Mar 2009 05:09:58 -0600
Henrik,
"integrated rms jitter on a clock signal" sounds a lot like a single sideband
phase noise specification. Maxim has a nice app note that describes the math
(there are a few others, search for "phase noise rms"):
http://www.maxim-ic.com/appnotes.cfm/an_pk/3359
Most spectrum analyzers out there will do the rms conversion for you, either
out of the box or with additional SW options. Here's an example:
http://cp.literature.agilent.com/litweb/pdf/5988-4348EN.pdf
Regards,
Marcus Mueller
Agilent Technologies
> -----Original Message-----
> From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-
> bounce@xxxxxxxxxxxxx] On Behalf Of Henrik G Madsen
> Sent: Wednesday, March 11, 2009 10:31
> To: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] What is 'Integrated RMS jitter' and how is it
> measured
>
> Hi
> Many specifications for communication chips like Bluetooth and others
> includes some jitter requirement for the clock input
>
> The jitter specification could be like
> Integrated rms jitter 10kHz - 10MHz (Fref& MHz) < 2 ps rms
>
> I have tried to search the web for a good explanation of this term and
> how to measure it and looked at different equipment vendors websites,
> but so far without luck. Can anybody point me to some document or like
> which describes the term 'Integrated RMS Jitter' and how to measure it?
>
> '2 ps' seems to be a very tight requirement
> Additionally, I would think that 'RMS' would require that the
> distribution was close to Gaussian, i.e random jitter and not
> deterministic jitter.
>
> Regards
> Henrik G Madsen
>
>
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