Measurement algorithms
Amplitude measurement algorithms
AC RMS measurement algorithm
AC RMS is the true Root Mean Square of the data points about the Mean (µ). This measurement can be made across the entire
record or on each cycle in the record.
Area measurement algorithm
Area is the arithmetic area for one waveform. The area measured above ground is positive. The area measured below ground is
negative. 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.
Details of the integration algorithm are given later. Integration algorithm on page 445
Amplitude measurement algorithm
Amplitude is the difference between the Top value and the Base value.
Amplitude = Top - Base
Base measurement algorithm
Base is calculated using the selected Base Top method. Base is the most common data value below the midpoint of the
waveform, when the default Base Top method Histogram Mode is selected. This measurement can be made across the entire
record or on each cycle in the record.
Integration algorithm
The integration algorithm used by the instrument is as follows:
W(t) is the sampled waveform
Å´(t) is the continuous function obtained by interpolation of W(t)
A and B are numbers between 0.0 and RecordLength – 1.0
If A and B are integers, then:
MSO54, MSO56, MSO58, MSO58LP, MSO64 Help 445
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