I may be mistaken but that does not look like harmonic distortion to me..... the frequency "imposed" on the 10MHz sine-wave is around 140MHz, this sounds like the VCO frequency in the Rb loop. The corner frequency of the filter could be a long way away from 10MHz in that case ....with maybe minimal phase shift tempco at 10MHz ?? Butterworth?
Alan G3NYK ----- Original Message ----- From: "David VanHorn" <d.vanh...@elec-solutions.com> To: "Discussion of precise time and frequency measurement" <time-nuts@febo.com> Sent: Tuesday, November 15, 2011 10:31 PM Subject: Re: [time-nuts] FE 5680A "new version" - Filtering the 10 MHz > > > * This is at the RF connector : http://i.imgur.com/Bg3SK.png > That's just nasty and indescriptible. > > > Close in impedance discontinuity? > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.