Measurements 14
Keysight InfiniiVision 2000 X-Series Oscilloscopes User's Guide 195
+ Width
+ Wid th is the time from the middle threshold of the rising edge to the middle
threshold of the next falling edge. The X cursors show the pulse being measured.
The Y cursor shows the middle threshold point.
– Width
– Wid th is the time from the middle threshold of the falling edge to the middle
threshold of the next rising edge. The X cursors show the pulse being measured.
The Y cursor shows the middle threshold point.
Duty Cycle
The duty cycle of a repetitive pulse train is the ratio of the positive pulse width to
the period, expressed as a percentage. The X cursors show the time period being
measured. The Y cursor shows the middle threshold point.
Rise Time
The rise time of a signal is the time difference between the crossing of the lower
threshold and the crossing of the upper threshold for a positive-going edge. The X
cursor shows the edge being measured. For maximum measurement accuracy, set
the horizontal time/div as fast as possible while leaving the complete rising edge
of the waveform on the display. The Y cursors show the lower and upper threshold
points.
Fall Time
The fall time of a signal is the time difference between the crossing of the upper
threshold and the crossing of the lower threshold for a negative-going edge. The X
cursor shows the edge being measured. For maximum measurement accuracy, set
the horizontal time/div as fast as possible while leaving the complete falling edge
of the waveform on the display. The Y cursors show the lower and upper threshold
points.
Duty cycle =
+ Width
Period
× 100
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