[email protected] said: > What I am trying to understand is, what does it REALLY mean when the > manufacturer's specs for a frequency standard or 'clock' claim a certain > accuracy. For ease and argument's sake let us assume that the accuracy is > given as 100 ppm or 1e-4 .... ... > But does that mean that, say, after one day I can be certain that my clock > will be fast/slow by no more than 8.64 seconds or could it potentially be > greater than that? ...
You have to read the data sheet, including the fine print. For low-cost oscillator packages, there is a simple spec like "50 ppm" that covers everything. It will be within spec if your power supply and temperature are within specs. It will still be within spec after N years, but they usually don't specify that. For expensive oscillators, the fine print gets interesting. There are usually specs for aging rate and warm up time. -- These are my opinions. I hate spam. _______________________________________________ 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.
