I agree that injection locking may not be ideal, but mainly because it's not that hard to do the job with an actual PLL. Here's an example of a quick-and-dirty Gunnplexer hack with an Analog Devices PLL chip and a Hittite prescaler: http://www.ke5fx.com/gunnpll.html . Close-in spectral purity was not great, but it would be fine for NBFM work.
-- john, KE5FX > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > Behalf Of Didier Juges > > If you are talking about injection locking, that will probably not be > practical. The Gunn is not stable enough (not the Gunn itself, but the > cavity where it will be installed) to stay close enough to the right > harmonic to stay locked, and the high order difference between the gunn > and the injection signal makes it just about impossible. Even if you > could lock it, you probably would have 10 MHz spurs (I am just guessing). > > Phase locking through a PLL system is possible of course, even though it > will be relatively complicated, unless you find one of these synthesizer > boards on eBay, designed for YIG oscillators, and modify it to drive a > varactor. > _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts