Hi Murray, On 2/2/10, Murray Greenman <murray.green...@rakon.com> wrote: > Frank, > > My suggestion would be to try injection locking, rather than a PLL. No > change is made to the 22MHz and 42MHz oscillators, except to find a way > to inject enough reference power to force them to lock to it. Injection > locking works well with modest harmonic relationships, and gives good > noise performance. The injection can be via a coupling link, or even at > the cold end of an existing bypass capacitor. Narrow pulses often work > best. > > I am confident that you could lock 22MHz to a 2MHz injection (divided > from your 10MHz reference) if the 2MHz pulse was narrow enough and the > 22MHz oscillator sufficiently stable. 42MHz is more of a challenge - you > might need a double-step, such as first locking 7MHz to 1MHz from the > reference, and using that to lock 42MHz.
I confess I've never heard about injection locking! Do you have any suggestion where to start from to learn about it? 73 Frank IZ8DWF _______________________________________________ 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.
