Rigol 2000 Series User Manual page 160

RIGOL
Time Parameters
RiseTime
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 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".
6-18
FallTime
+Width
Period
Figure 6-3 Time Parameters
Chapter 6 MATH and Measurements
-Width
MSO2000A/DS2000A User Guide
Threshold
Upper Limit
Threshold
Middle Value
Threshold
Lower Limit