[email protected] said: > Okay you want numbers. Well, I think 10 ppb or thereabouts should do it. > Somewhere there is a discontinuity in accuracy plotted against cost and I > don't want to cross that barrier just yet. If I can get 1 ppb without a big > increase in cost, I'll take that.
How good is your crystal? Junk crystals are good thermometers. Ballpark is 1 ppm/degree-C If you are running ntpd, turn on loopstats and measure the temperature... http://www.megapathdsl.net/~hmurray/ntp/slope.gif I've been watching a 3 MHz ovenized crystal. It was something like 4 for $25 from ebay. It's a 2 in sq can, over an inch high. It's got a few ppb of noise over minutes/hours and a few more ppb of drift/wander over days/months. It took several weeks to stabilize after power on. -- 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.
