[time-nuts] How to measure phase noise of HCMOS oscillators?

Bruce Griffiths bruce.griffiths at xtra.co.nz
Wed Mar 12 10:31:52 UTC 2014


Why not AC couple the HCMOS output to the LMH6702 input?

Bruce

Anders Time wrote:
> Thanks a lot for the input!
> I will try to use the LMH6702 as buffer.
> The correct way to measure the HCMOS oscillator would probably be to use a
> high impedance buffer with very low noise, to simulate driving a 10pF load
> or so. But I guess that is not easy to do. The LMH6702 voltage noise is
> probably low enough, but I do not know if it is possible to bias the HCMOS
> signal so it matches the LMH6702 input voltage range without increasing the
> noise level.
>
> I´m using a double balanced mixer form mini circuits as phase detector that
> can take 14dBm signals and a SRS FFT analyzer to measure the noise. The
> oscillator that I´m measuring is a 100MHz Crystek.
> /Anders
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
>    




More information about the Time-nuts_lists.febo.com mailing list