A few dumb questions: But first a quote from the ITU ( doc G.180 )
""4.1.12 (timing) jitter: The short-term variations of the significant instants of a timing signal from their ideal positions in time (where short-term implies that these variations are of frequency greater than or equal to 10 Hz). 4.1.15 wander: The long-term variations of the significant instants of a digital signal from their ideal position in time (where long-term implies that these variations are of frequency less than 10 Hz). NOTE – For the purposes of this Recommendation and related Recommendations, this definition does not include wander caused by frequency offsets and drifts."" DQ1. These both refer to phase variations, so with the exception of the frequency range specified, are they mathematically equivalent? DQ2. The note on wander excludes frequency offsets, but that is not specified for jitter, so do I have to include a frequency offset in jitter measurements? It seems to me that it make no sense to do so. DQ3. Can I deduce an underlying frequency offset from jitter (wander) by taking an RMS value over some window of values? regards, Mike _______________________________________________ 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.
