Hi Actually stability isn’t the main problem with the progamables. The issue is usually phase noise ad spurs. Often they use odd multi modulo divides rather than a PLL. That gives them a low cost chip, but the output spectrum is pretty poor. Figuring out if you have a “bad one” or not is tough from many data sheets. It’s rare that cheap XO’s come with phase noise and spur plots.
Bob On Sep 23, 2014, at 12:04 AM, Hal Murray <hmur...@megapathdsl.net> wrote: > > paulsw...@gmail.com said: >> Did try lots of frequencies and divider math to come up with a simple LO >> scheme for 61 or 59 KHz. Messy. > > There are companies that will make a crystal or oscillator at any frequency > you want at a not silly price. Delivery is not overnight. > > Beware: There are several companies selling instant delivery of oscillators > running at any frequency you want. They are using a programmable PLL so you > won't get the stability you expect from a crystal. > > -- > These are my opinions. I hate spam. > > > > _______________________________________________ > 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.
