RIGOL DG4000 Series - Manual (Page 70)

RIGOL Chapter 2 Basic Waveform Output
DG4000 Series User’s Guide 2-14
Pulse Width and Duty Cycle are correlative. Once a parameter is changed, the
other will be automatically changed. Pulse Duty Cycle is limited by the “Minimum
Pulse Width” and the “Pulse Period”.
 Pulse Duty Cycle ≥ 100 × Minimum Pulse Width ÷ Pulse Period
 Pulse Duty Cycle ≤ 100 Ч (1 - 2 Ч Minimum Pulse Width ÷ Pulse Period)
Press Width/Duty to highlight “Width”, and use the numeric keyboard or
direction keys and knob to input the desired value. Then, select the desired unit
from the pop-up menu.
 For the input method of the value, refer to the introduction in Parameter
Setting Method.
 Selectable Pulse Width units: sec, msec, μsec, nsec.
 Press this softkey again to switch to duty cycle setting (at this point, it is set to
20% automatically).
Leading/Trailing Edge Time
The Leading (rising) edge time is defined as the duration of the pulse amplitude
rising from 10% to 90% threshold, while the Trailing (falling) edge time is defined
as the duration of the pulse amplitude moving down from 90% to 10% threshold
as shown in the figure above.
The range of leading/trailing edge time is limited by the currently specified pulse
width limit as shown in the formula below. DG4000 will automatically adjust the
edge time to match the specified pulse width if the value currently set exceeds the
limit value.
Leading/Trailing Edge Time ≤ 0.625 × Pulse Width
Press Leading (or Trailing) to highlight the softkey. Use the numeric keyboard or
direction keys and knob to input the desired value and select the desired unit from
the pop-up menu.
 For the input method of the value, refer to the introduction in Parameter
Setting Method.
 Selectable Leading/Trailing Edge Time units: sec, msec, μsec, nsec.
 Leading edge time and trailing edge time are independent from each other
and users can set them separately.