RIGOL MSO/DS2000A Series - Manual (Page 150)

RIGOL Chapter 6 MATH and Measurements
6-14 MSO2000A/DS2000A 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.
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”.
RiseTime
FallTime
Threshold
Upper Limit
Threshold
Middle Value
Threshold
Lower Limit
+Width -Width
Period