John Ackermann N8UR wrote: > > One thing to note -- good phase noise and good ADEV don't necessarily go > together. Case in point is the -60158s are spec'd at 1x10e-12 at 1 > second, which is better than most of the 10811A variants, but the phase > noise isn't as good as other versions (like the -60258 you have). > > John
Yes, in fact, they have almost nothing to do with each other. Short term stability at 1 second is determined entirely by the crystal and phase noise at 1 kHz is determined almost entirely by the circuit. This is in the 10811 or any decent oscillator. Of course it is possible to use a poorly designed circuit that degrades the 1 s stability (or a really bad oven). And a crystal of much lower Q or higher intrinisic phase noise might affect phase noise. But in practice in the 10811, absent pathological corner cases, what I originally said is accuracy AFAIK. Rick Karlquist N6RK _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.