Chapter 2 Front Panel Operations RIGOL
DSG800 User's Guide 2-25
To Set the Pulse Width
The pulse width is the time that the pulse holds at the maximum value.
Press Source to select "Int" modulation source; press Mode to select "Single". The
single pulse is as shown in the figure below.
Press Width to set the width of the single-pulse modulating signal.
Use the numeric keyboard or knob to input the desired pulse width value.
The range of the pulse width is from 10 ns to (170 s - 10 ns).
The pulse width is limited by the minimum pulse width and pulse period.
Pulse Width ≥ Minimum Pulse Width
Pulse Width ≤ Pulse Period - 10 ns
Note: When "Ext" modulation source or "Train" pulse mode is selected, this menu is
grayed out and disabled. For the "Train" pulse width and the settings of the related
parameters, refer to "Train List".
To Select the Trigger Mode
Press Source to select "Int" modulation source; press Trig Mode to select "Auto",
"Ext Trig", "Ext Gate", "Key" or "Bus" trigger mode.
Auto
The default mode is auto. The RF signal generator meets the trigger condition at
any time and will start the pulse modulation once the pulse modulation function
is turned on.
External Trigger
In external trigger, the RF signal generator receives the external trigger signal
input from the [TRIGGER IN] connector (as shown in the figure on the next
page) at the rear panel. The instrument starts a pulse modulation each time a
TTL pulse with the specified polarity is received. To specify the polarity of the
TTL pulse, press Trig Slope to select "Pos" or "Neg" and the default is "Pos".
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