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OWON HDS1021M Handheld DSO & DMM 8-Advanced Function of Oscilloscope
figure 44: Automatic Measurements
Term interpretation
Vpp: Peak-to-Peak Voltage.
Vmax: The maximum amplitude. The most positive peak voltage measured over the entire
waveform.
Vmin: The minimum amplitude. The most negative peak voltage measured over the entire
waveform.
Vamp: Voltage between Vtop and Vbase of a waveform
Vtop: Voltage of the waveform’s flat top, useful for square/pulse waveforms.
Vbase: Voltage of the waveform’s flat base, useful for square/pulse waveforms.
Overshoot: Defined as (Vmax-Vtop)/Vamp, useful for square and pulse waveforms.
Preshoot: Defined as (Vmin-Vbase)/Vamp, useful for square and pulse waveforms.
Average: The arithmetic mean over the entire waveform.
Vrms: The true Root Mean Square voltage over the entire waveform.
Rise Time: Time that the leading edge of the first pulse in the waveform takes to rise from 10%
to 90% of its amplitude.
Fall Time: Time that the falling edge of the first pulse in the waveform takes to fall from 90% to
10% of its amplitude.
+Width: The width of the first positive pulse in 50% amplitude points.
-Width: The width of the first negative pulse in the 50% amplitude points.
+Duty: +Duty Cycle, defined as +Width/Period
-Duty: -Duty Cycle, defined as -Width/Period.
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