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The oscilloscope shows the horizontal scale as time per division in the scale readout. Since all active waveforms use
the same time base, the oscilloscope only displays one value for all the active channels.
4.5
Waveform Measurement
The oscilloscope displays graphs of voltage versus time and can help to measure the displayed waveform. There are
several ways to take measurements, using the graticule, the cursors or performing an automatic measurement.
Graticule
This method allows you to make a quick, visual estimate and take a simple measurement through the graticule
divisions and the scale factor.
For example, you can take simple measurements by counting the major and minor graticule divisions involved and
multiplying by the scale factor. If you counted 6 major vertical graticule divisions between the minimum and maximum
values of a waveform and knew you had a scale factor of 50mV/division, you could easily calculate your peak-to-
peak voltage as follows:
6 divisions x 50mV/division = 300mV.
Cursor:
This method allows you to take measurements by moving the cursors. Cursors always appear in pairs and the
displayed readouts are just their measured values. There are two kinds of cursors: Amplitude Cursor and Time
Cursor. The amplitude cursor appear as a horizontal broken line, measuring the vertical parameters. The time cursor
appear as a vertical broken line, measuring the horizontal parameters.
When using cursors, please make sure to set the Source to the waveform that you want to measure on the screen.
To use cursors, push the CURSOR button.
Automatic Measurement:
The oscilloscope performs all the calculations automatically in this mode. As this measurement uses the waveform
record points, it is more precise than the graticule and cursor measurements. Automatic measurements show the
measurement results by readouts which are periodically updated with the new data acquired by the oscilloscope.
