Hi If you do go the injection locking route check a couple of things:
1) Be sure to do the math and keep the 3db bandwidth down to the ~20 Hz range. Otherwise you will be getting more phase noise than you probably should. Generally this means having some kind of control on how much power you are injecting. 2) Consider what impact (if any) the extra signals running around in your radio will have. The harmonics of what ever you inject are one issue. The intermodulation products between the injection and the oscillator in some cases can be another. None of this is to say it does not work. Only that there are a few things that may (or may not) be issues. Bob -----Original Message----- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of francesco messineo Sent: Tuesday, February 02, 2010 4:14 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] FW: Injection locking On 2/2/10, Bruce Griffiths <bruce.griffi...@xtra.co.nz> wrote: > However injection locking also works when the frequencies ratios involved > are rational numbers. > For 22MHz and 10MHz, the corresponding ratio is 11/5 a rational number. > For 42MHz and 10MHz, the frequency ratio is 21/5 a rational number Then 2 MHz would work for both, obtaining 2 MHz from 10 MHz is quite easy, HP AN-301-1 plus a 74LS193 would do it. If I can make it work with the current oscillator design I'm using, I can easily adapt it also to already made transverters, very tempting. Frank _______________________________________________ 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.