Measurement | Description | Cursors |
---|---|---|

Amplitude | The Amplitude of a waveform is the difference between its
Top and Base values.
| The Y cursors show the values being measured. |

Average | Average is the sum of the waveform samples divided by the number of samples
over one or more full periods. If less than one period is displayed,
Average is
calculated on the full width of the display.
where k^{th} point
being measured and N is the number of points in the measurement
interval.
| The X cursors show what portion of the displayed waveform is being measured. |

Base | The Base of a waveform is the mode (most common value) of the lower part of
the waveform, or if the mode is not well defined, the base is the same as
Minimum. | The Y cursor shows the value being measured. |

Maximum | Maximum is the highest value in the waveform display. | The Y cursor shows the value being measured. |

Minimum | Minimum is the lowest value in the waveform display. | The Y cursor shows the value being measured. |

Peak-Peak | The Peak-to-Peak value is the difference between
Maximum and Minimum
values. | The Y cursors show the values being measured. |

RMS | RMS (dc) is the root-mean-square value of the waveform over one or more full
periods. If less than one period is displayed, RMS (dc) average is calculated on
the full width of the display.
where k^{th} point
being measured and N is the number of points in the measurement
interval.
An alternative value RMS (ac) is calculated from One form changes if the waveform offset changes; the other does not. How does your oscilloscope calculate an rms value? | The X cursors show what interval of the waveform is being measured. |

Top | The Top of a waveform is the mode (most common value) of the upper part of
the waveform, or if the mode is not well defined, the top is the same
as Maximum.
| The Y cursor shows the value being measured. |

Maintained by John Loomis,
last updated *4 January 2009 *