[ sorry, let me try that again ] > Hmmm... with 25m position accuracy (and 100ns is > about 30m), how do they really get time down to a > few ns. Clever engineering! :-)
You're comparing apples and oranges: accuracy and stability. The 25 m value you often read is probably a valid figure for the positional accuracy of an M12. But do not confuse this with the "few ns" timing value you read about here. No one I know has an M12 that is accurate to a few ns. What many of us have are M12 that exhibit residual timing jitter of a few ns, when properly sawtooth corrected and averaged over time compared to a local cesium standard. In other words, a properly filtered M12 is *stable* to a few ns over some time frame. But it's highly unlikely it is *accurate* to a few ns. A couple of ten ns is much more likely. And this is in the same ballpark as the "25 m" positional value. /tvb _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
