Re: [SI-LIST] : Jitter measurement

About this list Date view Thread view Subject view Author view

From: Henry Lee (henry@modern-telecom.com)
Date: Mon Mar 19 2001 - 18:55:34 PST


There is also a jitter measurement&analysis instrument from Wavecrest.
It is a time domain measurment and analysis can be done in the frequency
domain.

> Paul, Sunil,
>
> Using a spectrum analyzer to measure jitter assumes that there is
> negligible variation in amplitude of the signal. I think this can
> be a very tough assumption to make valid.
>
> Regards,
> Mike
>
> Paul Levin wrote:
> >
> > Dear Sunil,
> >
> > Better than either of these would be to get your hands on a good,
> > old-fashioned analog spectrum analyzer. Center your display on
> > the nominal frequency and then decrease your resolution bandwidth
> > (and everything that goes along with it) so that you can see the
> > detail in the first few KHz on either side of the center frequency.
> >
> > You'll have to study up on jitter mathematics and dBc offsets, but
> > once you've got that straight, you can integrate the flanks of your
> > oscillator between any f1 and f2 and determine the likely jitter
> > arising from noise in that frequency range.
> >
> > Paul Levin
> > Senior Principal Engineer
> > Logic Innovations
> > __________________
> >
> > Sunil Kumar wrote:
> >
> > > Hello everybody..
> > >
> > > I want to measure cycle-to-cycle jitter generated by a crystal
> > > oscillator. I have two options:
> > >
> > > 1) Real time oscilloscope
> > > 2) Sampling oscilloscope
> > >
> > > The bandwidth of the real time oscilloscope is enough for my
> > > measurements. Both the oscilloscopes are equipped with jitter
> > > measurement packages. Can anybody suggest which method is better?
> > > And why?
> > >
> > > Thanks a lot..
> > >
> > > Sunil Kumar
> > >
> > > **** To unsubscribe from si-list or si-list-digest: send e-mail to
> > > majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE
> > > si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP.
> > > si-list archives are accessible at http://www.qsl.net/wb6tpu
> > > ****
> >
> > **** To unsubscribe from si-list or si-list-digest: send e-mail to
> > majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE
> > si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP.
> > si-list archives are accessible at http://www.qsl.net/wb6tpu
> > ****
>
> --
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Mike Jenkins Phone: 408.433.7901 _____
> LSI Logic Corp, ms/G715 Fax: 408.433.7495 LSI|LOGIC| (R)
> 1525 McCarthy Blvd. mailto:Jenkins@LSIL.com | |
> Milpitas, CA 95035 http://www.lsilogic.com |_____|
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> **** To unsubscribe from si-list or si-list-digest: send e-mail to
> majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE
> si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP.
> si-list archives are accessible at http://www.qsl.net/wb6tpu
> ****

--

Regards,

Henry Lee Modern Telecom 408-434-0869 x7002


**** To unsubscribe from si-list or si-list-digest: send e-mail to majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP. si-list archives are accessible at http://www.qsl.net/wb6tpu ****


About this list Date view Thread view Subject view Author view

This archive was generated by hypermail 2b29 : Thu Jun 21 2001 - 10:11:16 PDT