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Term Explanation
Pulse Width:
There are two kinds of Pulse Width—positive and negative.
Positive Pulse Width is the time span between thresholds of 50% of the rising edge
amplitude to the next 50% of the falling edge amplitude.
Negative Pulse Width is the time span between thresholds of 50% of the falling edge
amplitude to the next 50% of the rising edge amplitude.
Pulse Width is determined by Period and Duty Cycle;
the formula is: Pulse Width = Period * Duty Cycle.
Edge Time:
The time span between the thresholds of the 10% to 90% of the rising edge amplitude
is called Rising Time.
The time span between the thresholds of the 90% to 10% of the falling edge
amplitude is called Falling Time.
The Rising Time and the Falling Time together are called Edge Time.
To Set the Pulse Width / Duty Cycle
(1) Press F4 button, the chosen menu item is highlighted, the focused parameter is
displayed in Parameter bar 1. Press F4 to switch between Frequency/Period.
(2) Turn the knob to change the value directly;
or press the number keys to input the desired value and choose the unit.
The Pulse Width is limited by Period. The min value of the Pulse Width is 20ns. The Duty
Cycle range is 0～100%. When the setting of Duty Cycle makes the Pulse Width less than
20ns, the system will automatically adjust the Pulse Width to 20ns.
Parameter bar 1
Input box
Pulse Width
Figure 5-8: Set the Pulse Width of Pulse signal
To Set the Edge Time
(1) Press F5 button, the "Edge Time" menu item is highlighted, the current value of
the edge time is displayed in Parameter bar 1.
5.Front Panel Operation
Current parameter
Pulse Width
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