Oscilloscope Reference Measurement algorithms
StartCycle = MCross1
EndCycle. is the ending time for cycle measurements. It is a floating-point number with values between
0.0 and (Record Length – 1.0), inclusive.
EndCycle = MCross3
Waveform [<0.0 ... RecordLe ngth–1.0>]. holds the acquired data.
TPOS. is the location o f 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 TPOS 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 ( TPOS + TSOFF).
Measurement algorithms
The automa ted measurements are defined and calculated as follows:
Amplitude
Amplitude = High – Low
Aarea
The arithmetic area for one waveform. Remember that one waveform is not necessarily equal to one cyc l e.
For cyclical data you may prefer to u se the cycle area rather than the arithmetic area.
If Start = End then return the (interpolated) value at Start.
Otherwise,
Details of the integration algorithm are given later. Integration Algorithm (see page 737)
Cycle area
Amplitude (voltage) measurement. The area over one waveform cycle. For data not cyclical, you might
prefer to use the Area measurement.
If StartCycle = EndCycle then return the (interpolated) value at StartCycle.
DSA/DPO70000D, MSO/DPO/DSA70000C, DPO7000C, and MSO/DPO5000 Series 729
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