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10.2.1.1
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Time Parameters
Rise Time
+Width
•
Period: defined as the time between the middle threshold points of two
consecutive, like-polarity edges.
•
Frequency: defined as the reciprocal of period.
•
Rise Time: indicates the time for the signal amplitude to rise from the threshold
lower limit to the threshold upper limit.
•
Fall Time: indicates the time for the signal amplitude to rise from the threshold
upper limit to the threshold lower limit.
•
+Width: indicates the time between the threshold middle value of a rising edge
to the threshold middle value of the next falling edge.
•
-Width: indicates the time between the threshold middle value of a falling edge
to the threshold middle value of the next rising edge.
•
+Duty: indicates the ratio of the positive pulse width to the period.
•
-Duty: indicates the ratio of the negative pulse width to the period.
•
Tvmax: indicates the time that corresponds to the maximum value of the
waveform (Vmax).
•
Tvmin: indicates the time that corresponds to the minimum value of the
waveform (Vmin).
The default values for threshold upper limit, threshold middle value, and threshold
low limit are 90%, 50%, and 10%, respectively.
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15
10
20
5
25
0
30
Fall Time
- Width
Period
Figure 10.1 Time Parameters
Measurements
Threshold
Upper Limit
Threshold
Middle Value
Threshold
Lower Limit
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DHO1000 User Guide
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