[SI-LIST] Re: PPM measurement for reference clock
- From: Randy Dawson <rdawson16@xxxxxxxxxxx>
- To: "lijun_hit@xxxxxxxxx" <lijun_hit@xxxxxxxxx>, "si-list@xxxxxxxxxxxxx" <si-list@xxxxxxxxxxxxx>
- Date: Tue, 8 Jan 2013 16:27:32 -0600
Since you have a spectrum analyzer, you can probably do better than a
frequency counter (depending on the quality of your counter):
Mix
your signal with a good quality 10 MHz reference OXCO (Vectron C4550A1,
Isotemp OXCO143 or similar, their freq PPB is ~+-300)
Measure the difference between your clock peak and the mix on either side to
derive your ppm.
Randy Dawson
> Date: Tue, 8 Jan 2013 13:22:28 -0800
> From: lijun_hit@xxxxxxxxx
> Subject: [SI-LIST] PPM measurement for reference clock
> To: si-list@xxxxxxxxxxxxx
>
> Hi experts,
> Except frequency counter, is there any other equipment recommendation for
> clock PPM measurement? Do you think center frequency of spectrum analyzer can
> be utilized for ppm calculation?
> Thanks
> Jun
>
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