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RIGOL Chapter 6 MATH and Measurements
6-18 MSO2000A/DS2000A User’s Guide
Time Parameters
Figure 6-3 Time Parameters
1. Period: the time between the threshold middle value of one edge to 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 f igure 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”.
RiseTime
FallTime
Threshold
Upper Limit
Threshold
Middle Value
Threshold
Lower Limit
+ Width
-Width
Period
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