RIGOL DG4000 Series - Manual (Page 178)

RIGOL Chapter 10 Utility and System Settings
DG4000 Series User’s Guide 10-6
Figure 10-2 Resistance Setting
The generator will adjust the output amplitude and offset voltage automatically
once the resistance setting is changed. For example, the current amplitude is 5Vpp.
At this point, change the output resistance from 50Ω to HighZ and the amplitude
displayed on the screen will double to 10Vpp. If the output resistance is changed
from HighZ to 50Ω, the amplitude will reduce to half of the previous value (2.5Vpp).
Notice that only the displayed values change with the parameter and the real
output from the generator does not change.
Noise Setting
DG4000 supports to superpose a gauss noise onto its output signal. This function
is called noise superposition. The signal superposed with noise can be used to test
the anti-noise capability of instrument.
Press Utility  CH1Set  Noise to enable or disable noise superposition
function. The default is “OFF”. When Mod, Sweep or Burst is enabled, this menu is
grayed out and disabled.
Noise Scale
Set the percentage of the amplitude of the noise superposed onto the output
signal takes up in the signal amplitude.
Press Utility  CH1Set  Noise Scale. Use the numeric keyboard to input the
desired value and select the unit “%” from the unit menu. The range available is
from 0% to 50% and the default is 10%. Note that Noise Scale is grayed out and
disabled when noise superposition function is disabled.
Resistance Setting