Chapter 2 Front Panel Operations RIGOL
DG800 User's Guide 2-5
To Set Amplitude/High Level
The amplitude setting range is limited by the "Impedance" and "Freq/Period" settings.
By default, it is 5 Vpp.
The amplitude displayed on the screen is the default value or the amplitude
previously set. When the instrument configuration (e.g. frequency) is changed, if this
amplitude is valid, the instrument will still use this amplitude; otherwise, the
instrument would display a prompt message and set the amplitude to the amplitude
upper limit of the new configuration automatically. You can also use "High Level" or
"Low Level" to set the amplitude.
Tap the Ampl parameter input field to input the desired frequency value with the
numeric keypad, then select the unit. Tap "Ok".
The amplitude units available are Vpp, mVpp, Vrms, mVrms, and dBm (invalid in
HighZ).
Tap the label again to switch to High Level setting.
The high level units available are V and mV.
You can also use the arrow keys and the knob to set the parameter value: press
down the knob to enter the editing mode, use the arrow keys to move the cursor to
select the digit to be edited, and then rotate the knob to modify the value. Besides,
you can use the knob to switch between different parameters.
1
How to convert the amplitude in Vpp to the corresponding value in
Vrms?
Method:
Vpp is the unit for signal peak-peak value and Vrms is the unit for
root-mean-
square value. The default unit is Vpp. When you set the amplitude,
input a decimal point in the numeric keypad, and then select a unit. Tap "Ok"
to switch to the unit of the current amplitude.
Remarks:
For different waveforms, the relation between Vpp and Vrms is different. The
relation of the two units is as shown in the figure below (take sine waveform
as an example).
Vpp=2Vamp
Vrms=0.707Vamp
Vamp
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