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Appendix B: Algorithms
Appendices
W(t)
is the sampled waveform
is the continuous function obtained by linear interpolation of
W(t)
A
and
B
are numbers between 0.0 and –1.0
If
A
and
B
are integers, then:
where
s
is the sample interval.
Similarly,
is approximated by where:
W(t)
is the sampled waveform
is the continuous function obtained by linear interpolation of
W(t)
A
and
B
are numbers between 0.0 and –1.0
If
A
and
B
are integers, then:
where
s
is the sample interval.
Time measurements on envelope waveforms must be treated differently from
time measurements on other waveforms, because envelope waveforms
contain so many apparent crossings. Unless otherwise noted, envelope
waveforms use either the minima or the maxima (but not both), determined in
the following manner:
1. Step through the waveform from to until the sample min and
max pair
DO NOT
straddle .
2. If the pair > , use the minima, else use maxima.
If all pairs straddle , use maxima. See Figure A-4.
The Burst Width measurement always uses both maxima and minima to
determine crossings.
Measurements on
Envelope Waveforms