Measurements 14
Keysight InfiniiVision HD3-Series Oscilloscopes User's Guide 199
– Width
– Width is the time from the middle threshold of the falling edge to the middle
threshold of the next rising edge. The X markers show the pulse being measured.
The Y marker shows the middle threshold point.
Burst Width
The Burst Width measurement is the time from the first edge to the last edge on
screen.
Duty Cycle
The duty cycle of a repetitive pulse train is the ratio of the pulse width to the
period, expressed as a percentage. The X markers show the time period being
measured. The Y marker shows the middle threshold point.
Bit Rate
The bit rate measurement measures all positive and negative pulse widths on the
waveform, takes the minimum value found of either width type and inverts that
minimum width to give a value in Hertz.
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
marker 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 markers show the lower and upper
threshold points.
+ Duty cycle =
+ Width
Period
× 100 − Duty cycle =
− Width
Period
× 100
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