User manual

RIGOL Chapter 2 Basic Waveform Output
DG4000 User's Guide
2-6
Tips:
1. Switch between Vpp and Vrms
Vpp is the unit for the signal peak-peak value and Vrms is the unit for the
signal effective value. The default unit of the instrument is Vpp. Users
can quickly switch the current amplitude unit from the front panel.
For different waveforms, the relations between Vpp and Vrms are
different. Take sine waveform as an example; the relation of the two
units is as shown in the figure below.
According to the figure above, the conversion relation between Vpp and
Vrms fulfills the following equation.
VrmsVpp= 22
For example, to convert 2Vpp to the corresponding value in Vrms.
Press · in the numeric keyboard and select the Vrms menu. For sine
waveform, the converted value is 707.2mVrms.
2. How to set the waveform amplitude in dBm?
Method (Take CH1 as an Example):
1) Press CH1 to select CH1.
2) Press Utility  CH1Set  Resi to select "Load" and use the
numeric keyboard (or the direction keys and knob) to set a proper
resistance value.
3) Select the desired waveform; press Ampl/HiLevel to highlight
"Ampl"; use the numeric keyboard to input the desired value and
select dBm in the pop-up menu.
dBm is the unit for the absolute value of the signal power. dBm and Vrms
VampVpp=2
Vamp
2VampVrms=