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Appendix B: Algorithms
Appendices
MidRef + (Hysteresis x Amplitude)
MidRef – (Hysteresis x Amplitude)
MidRef
MCross1
(StartCycle)
MCross2
MCross3
(EndCycle)
Figure A-1: MCross Calculations
Waveform[<0.0 ... RecordLength–1.0>] — holds the acquired data.
TPOS — is the location of the sample just before the trigger point (the time
reference zero sample). In other terms, it contains the domain reference
location. This location is where time = 0.
TSOFF — is the offset between and the actual trigger point. In other
words, it is the trigger sample offset. Values range between 0.0 and 1.0
samples. This value is determined by the instrument when it receives a
trigger. The actual zero reference (trigger) location in the measurement record
is at ( + ).
The automated measurements are defined and calculated as follows.
Amplitude
= –
Area
The arithmetic area for one waveform. Remember that one waveform is not
necessarily equal to one cycle. For cyclical data you may prefer to use the
cycle area rather than the arithmetic area.
if = then return the (interpolated) value at .
Otherwise,
=
Measurement
Algorithms