Abstract
For common FM noise in oscillators, discontinuous measurements with dead-time, small sample statistics, and an assumed /spl chi//sup 2/ distribution, the RMS frequency fluctuations vs. time-interval may be the only reportable measure of frequency stability. We show in a group of simulation trials that in a typical experimental scenario, the RMS frequency stability can seriously underestimate true flicker frequency (FLFM) and random-walk frequency (RWFM) noise and can have larger long-term uncertainty with respect to the zero dead-time Allan deviation and should not be reported as Allan deviation.
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