> In the US, at one time there was a specification that required the average > over a (I think 24 hours) to be within three seconds. It always was when > I was growing up in the 60's and 70's. Now I've seen it get as much as 4 > seconds (once 5) out.
Today, it is not uncommon where I am (deep in the NE US power grid) to see peak errors of +/- 10 or even 20 seconds on synchronous wall clocks. (Which is not necessarily at odds with that average spec.)
Best regards, Charles _______________________________________________ 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.
