Appendix
660
Short-term instability of one edge relative to a reference edge. Usually
specified as rms value, which is one standard deviation or “sigma”. If
distribution is assumed Gaussian, six sigma represents 99.74% of the peak-
peak jitter.
The reference edge for period jitter is the previous leading edge. That for
delay jitter is the leading edge of the trigger output. Width jitter is the
stability of the trailing edge with regard to the leading edge.
Long-term average instability over a specific time, for example, hour, year.
Jitter is excluded.
Pulse output is specified as pulse top and pulse base (usually referred to as
high level and low level), or as peak to peak amplitude and median offset. A
“window” specification shows the limits within which the pulse can be
positioned.
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