); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY From: "John Miles" <[EMAIL PROTECTED]> Subject: Re: [time-nuts] Basic regenerative-divider questions Date: Fri, 28 Sep 2007 21:40:04 -0700 Message-ID: <[EMAIL PROTECTED]>
> > A divide by 8 conjugate regenerative divider has been built and tested > > by NIST. > > > > In principle it would be possible to generate F/2, F/4 and F/8 outputs > > simultaneously by adding parallel conjugate filtered feedback paths > > tuned to 3F/2, 7F/8, 3F/4, F/2, F/4 and F/8. > > However the difficulties associated with optimising the phase shifts and > > gains of all the filtered feedback paths may be more trouble than > > its worth. > > Yes, I imagine I'll take the lazy way out and just run separate dividers in > parallel from a 2- or 3-way splitter following the OCXO. Thanks for the > uploads and links. Got some reading to do this weekend. Each divisor would be really simple anyway. > I rigged up a divider last night with a 220-MHz SAW filter and a > randomly-chosen Mini-Circuits mixer, MMIC amp, and 2:1 splitter. I was > surprised at how well it worked without any tweaking. It was kind of > surreal to see the f/2 output appear abruptly once the 440-MHz input reached > a certain level. At +4 dBm of excitation there was nothing at the output, > but with +5 dBm at the input, a nice clean 220 MHz signal appeared out of > nowhere at +16 dBm. Did you experience the start of oscillation also as you went from +3 dBm to +4 dBm? The impulse may be part of getting the oscillation running. Cheers, Magnus _______________________________________________ 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.