Taking measurements
The oscilloscope displays graphs of voltage versus time and can help you to
measure the displayed waveform.
There are several ways to take measurements. You can use the graticule, the
cursors, or an automated measurement.
Graticule
This method allows you to make a quick, visual estimate. For example, you
might look at a waveform amplitude and determine that it is a little more than
100 mV.
You can take simple measurements by counting the major and minor graticule
divisions involved and multiplying by the scale factor.
For example, if you counted five major vertical graticule divisions between the
minimum and maximum values of a waveform and knew you had a scale factor
of 100 mV/division, then you could calculate your peak-to-peak voltage as
follows:
5 divisions x 100 mV/division = 500 mV
Cursor
Cursors
This method allows you to take measurements by moving the cursors, which
always appear in pairs, and reading their numeric values from the display
readouts. There are two types of cursors: Amplitude and Time.
When you use cursors, be sure to set Source to the waveform on the display that
you want to measure.
You can use the cursors to define the measurement gating area, after you have
turned on Measure Gating in the Measure menu. The oscilloscope will restrict
the gated measurement you take to the data between the two cursors.
To use cursors, push the Cursor button.
Amplitude Cursors. Amplitude cursors appear as horizontal lines on the display
and measure the vertical parameters. Amplitudes are referenced to the reference
level. For the FFT function, these cursors measure magnitude.
Understanding oscilloscope functions
26 TBS1000B and TBS1000B-EDU Series Oscilloscopes User Manual
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