RIGOL MSO/DS4000 Series - Manual (Page 57)

RIGOL
MSO4000/DS4000 Quick Guide 15
Knob
This knob can be used to adjust the value of the parameters, adjust the waveform
brightness and select the desired menu (the backlight turns on during the operation).
 During parameter input, turn the knob clockwise to increase the parameter and
counterclockwise to decrease.
 When the menu blanks off, rotate the knob to adjust the waveform brightness.
The adjustable range is from 0% to 100%. Turn the knob clockwise to increase
the waveform brightness and counterclockwise to decrease. Press down the
knob to reset the waveform brightness to 50%. Users can also press Display 
WaveIntensity and then rotate the knob to adjust the waveform brightness.
 During menu operation, after pressing a menu softkey, rotate the knob to switch
to the desired sub-menu under that menu and then press down the knob to
select this sub-menu. You can also use it to modify parameter and input
filename.
Navigation Knob
This knob provides quick Adjust/Locate function for
numerical parameters with relatively larger settable
ranges. Turn the knob clockwise (counter-clockwise) to
increase (reduce) the value. Note that the inner knob is
used for fine adjustment and the outer knob for coarse
adjustment. The more the outer knob is rotated, the
faster the value will change. For example, this knob can
be used to quickly locate the waveform frame (“Current
Frame” menu) to be played back in waveform playback.
Similar menus include trigger holdoff, pulse width
setting, slope time etc.