RIGOL Chapter 6 MATH and Measurement
6-22 MSO1000Z/DS1000Z User’s Guide
Time Parameters
Figure 6-3 Time Parameters
1. Period: defined as the time between the middle threshold points of two
consecutive, like-polarity edges.
2. Frequency: defined as the reciprocal of period.
3. Rise Time: the time for the signal amplitude to rise from the threshold lower
limit to the threshold upper limit.
4. Fall Time: the time for the signal amplitude to fall from the threshold upper
limit to the threshold lower limit.
5. + Width: the time difference between the threshold middle value of a rising
edge and the threshold middle value of the next falling edge of the pulse.
6. - Width: the time difference between the threshold middle value of a falling
edge and the threshold middle value of the next rising edge of the pulse.
7. + Duty: the ratio of the positive pulse width to the period.
8. - Duty: the ratio of the negative pulse width to the period.
9. tVmax: the time corresponding to the waveform maximum value (Vmax).
10. tVmin: the time corresponding to the waveform minimum value (Vmin).
Note: The default values of the threshold upper limit, threshold middle value and
threshold lower limit in the figure above are 90%, 50% and 10% respectively. You
can set them via Measure Setting Type “Threshold” and for the setting
method, please refer to the introduction in “Threshold Measurement Setting”.
Upper Limit
Middle Value
Lower Limit
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