In my design I need 10ppM, and then I divide by 8. Software can't correct for anything.
-----Original Message----- From: time-nuts [mailto:[email protected]] On Behalf Of Bob Bownes Sent: Tuesday, March 14, 2017 10:50 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Bye-Bye Crystals not to mention +/- a few hundred ppm is not a big deal. You can always correct for it in software. ;) On Tue, Mar 14, 2017 at 8:49 AM, jimlux <[email protected]> wrote: > On 3/14/17 5:04 AM, Bob Camp wrote: > >> Hi >> >> The cost difference between a complete oscillator package and a >> simple >>> crystal is tiny. The osc is often cheaper if you include board >>> space or engineering time. >>> >> >> Purchased in volume, the difference it the price of a crystal vs a >> complete XO is enormous. You will see at least a 10:1 cost savings on >> the crystal and likely more than that. Simply attaching a crystal to >> the internal oscillator inside a chip is nearly zero engineering >> cost. If your product is cost sensitive and not super tight >> tolerance … you go with the crystal. >> >> > And that crystal business (gazillions of inexpensive 16 MHz crystals) > is very different from making an approximately 12 MHz crystal used in > a VCXO that will be FMed and multiplied up by 36 to make a 430 MHz > transmitter, oh, and that matches whatever temperature compensation > scheme GE used in 1970. > > > > _______________________________________________ > time-nuts mailing list -- [email protected] To unsubscribe, go to > https://www.febo.com/cgi-bin/m ailman/listinfo/time-nuts and follow > the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
