Mike Singer <mike@POLUOSTROV.NET> wrote:
> Harold M Hallikainen wrote:
> > Also, remember that setting a 12 MHz oscillator to
> > within 1 Hz means it isn't going to stay there.
> > That's 0.1 ppm. Really good crystal oscillators
> > (with temperature compensation or ovens) can maybe
> > do 1 ppm or so.
>
> Yes, from Electronicstalk.com:
>
> "The FTS501AH OCXO offers a frequency stability of
> > +/-250ppb over the standard temperature range of 0 to 70C"

I just saw a similar announcement in EETimes for single- and double-OCXO
oscillators for telecom use (Stratum 2 and 3) that have short-term holdover
accuracy of 10 ppb and 1 ppb over 24 hours. I forget who the manufacturer
is.

> (ppb = 1000 ppm ?)

No, 1000 ppb = 1 ppm.

-- Dave Tweed

--
http://www.piclist.com hint: To leave the PICList
mailto:piclist-unsubscribe-request@mitvma.mit.edu