Chapter 6 MATH and Measurements RIGOL
DS2000E User’s Guide 6-17
Time Parameters
Figure 6-3 Time Parameters
1. Period: the time between the threshold middle value of one edge and the
threshold middle value of the next edge with the same polarity.
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 of the rising edge.
4. Fall Time: the time for the signal amplitude to fall from the threshold upper
limit to the threshold lower limit of the falling edge.
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.
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
Period
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