I was just about to write the same thing as below. Yes you can measure ADEV with the unit in a temperature controlled box but unless you intend to use the unit in that same box what does the test tell you? These are spec'd for use in unheated cell towers and the engineer looked at the worse case and said "good enough for my intended usage" So if you intend to use this with portable field day microwave gear then test the unit outdoors while powering with a gas powered generator. If it will be used as a lab standard, test it there. Mine is in a box with a temperature controlled fan. Realistically I expect +-2C swings So I'll measure it inside that box.
On Thu, Feb 9, 2012 at 7:10 AM, Jim Lux <[email protected]> wrote: > I suppose you could run your widget in a temperature controlled chamber, get > those numbers. Then run it in a less controlled benchtop environment, and > get those numbers, and claim that the difference is environmental. > > But at some point, what you're interested is the performance of the system > in the environment in which it will be used. If you need good ADEV > performance at the 1000 second tau, then you need an oven, a vacuum bottle, > or a better design that's less environment sensitive. Chris Albertson Redondo Beach, California _______________________________________________ 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.
