If you only want a house clock from the Rb osc then why go to all the trouble? Just put together a low pass filter to the Rb squre wave and get rid of the higher harmonics above 10 Mhz ... that should give you a clean 10Mhz wave based on the Rb performance
jerry -----Original Message----- From: Andy Bardagjy [mailto:a...@bardagjy.com] Sent: Sunday, May 19, 2013 19:31 To: Discussion of precise time and frequency measurement Subject: [time-nuts] 10Mhz Sine from Square Wave Synthesizer Hi folks, I recently picked up a Symmetricom SA.22c rubidium oscillator. According to the datasheet, it outputs a square wave with programmable frequency (well you can pick among some set of frequencies). I'd like to build up a small circuit locked to the square wave output which outputs a 10MHz sine wave for use as my "house clock" for my various instruments (spec an, counter etc). I of course could distribute the square wave, but am concerned about harmonics, among other things. The FE-5680A uses a AD9830A DDS to synthesize its output. Is a DDS the right way to go - in terms of performance, phase noise and so on? I suppose I could do this with a tank or some other analog circuit, but.. Andy Bardagjy bardagjy.com _______________________________________________ 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.