Measurements 14Keysight 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 middlethreshold 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 middlethreshold of the next rising edge. The X cursors show the pulse being measured.The Y cursor shows the middle threshold point.Duty CycleThe duty cycle of a repetitive pulse train is the ratio of the positive pulse width tothe period, expressed as a percentage. The X cursors show the time period beingmeasured. The Y cursor shows the middle threshold point.Rise TimeThe rise time of a signal is the time difference between the crossing of the lowerthreshold and the crossing of the upper threshold for a positive-going edge. The Xcursor shows the edge being measured. For maximum measurement accuracy, setthe horizontal time/div as fast as possible while leaving the complete rising edgeof the waveform on the display. The Y cursors show the lower and upper thresholdpoints.Fall TimeThe fall time of a signal is the time difference between the crossing of the upperthreshold and the crossing of the lower threshold for a negative-going edge. The Xcursor shows the edge being measured. For maximum measurement accuracy, setthe horizontal time/div as fast as possible while leaving the complete falling edgeof the waveform on the display. The Y cursors show the lower and upper thresholdpoints.Duty cycle = + WidthPeriod × 100
