docdai...@gmail.com said: > I am ok for awhile but how do you center the efc of an ocxo? I understand > there is something (screw) to adjust the ocxo so it is approximately on freq > with 2.5v efc.
> Specific oscillator datum-1111c. I have he datasheet but doesn't say "coarse > frequency adjust this screw" or some such. There may not be a coarse adjustment. If the tuning range is big enough to cover the aging over your design life, you don't need one. There is a tradeoff between adjustment range and the number of bits you need in a DAC to get a required accuracy. Suppose I have an adjustment range of 1 Hz (peak to peak) on a 10 MHz oscillator. That's 1 part is 10^7. If I have a 10 bit DAC, I can adjust to 1 part is 10^10. A 20 bit DAC can get to 1 part is 10^13. But if the tuning range is 10 Hz, the same 20 bit DAC setup only gets you to 1 part is 10^12. -- 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.
