[time-nuts] Phase, One edge or two? (was Digital mixing with a D Flip Flop)
kb8tq at n1k.org
Thu Oct 23 00:11:52 UTC 2014
There are a number of papers out there that talk about decimation vs averaging for ADEV. They have various data sets processed by both techniques.
Bottom line - decimation does a better job than averaging for ADEV. At least that’s true if you want the result to resemble the “real” ADEV of the source(s).
> On Oct 22, 2014, at 6:45 PM, Tom Van Baak <tvb at LeapSecond.com> wrote:
>>> 3) Every instant on a sine wave is actually a data point, not just
>>> the zero crossing(s). So in reality there is near infinite information
>> Sorry, but no.
>> If you tell me it is a sine and give me the time of two zero crossings
>> I can tell you everything there has or ever will be to know about any
>> point on that sine-wave.
> What about phase noise measurements? It's the distortion from a mathematically ideal sine wave that allows one to make L(f) plots out to MHz and GHz. TimePod also gives you AM noise plots; you don't get that from just looking at zero crossings.
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
More information about the Time-nuts_lists.febo.com