Chapter 2 Vertical System Setting RIGOL
MSO4000/DS4000 User’s Guide 2-3
To Adjust the Vertical Scale
The vertical scale refers to the voltage value per grid on the vertical direction on the
screen and is usually expressed as V/div. The adjustable range of the vertical scale is
related to the current probe ratio and input impedance. By default, the probe ratio is
1X, the input impedance is 1 MΩ and the adjustable range of the vertical scale is from
1 mV/div to 5 V/div.
Press CH1 and its backlight is illuminated; then, press Volts/Div to switch the
vertical scale adjustment mode of CH1 between “Coarse” and “Fine” (the default is
“Coarse”). You can also press VERTICAL
SCALE corresponding to CH1 to
quickly switch the current adjustment mode.
When “Coarse” is selected, turning VERTICAL SCALE will adjust the
vertical scale within the adjustable range at 1-2-5 step sequence. Turn the knob
clockwise to reduce the vertical scale and counterclockwise to increase the
vertical scale.
When “Fine” is selected, turning VERTICAL SCALE will further adjust the
vertical scale within the adjustable range at a smaller step to improve the
vertical resolution. Turn the knob clockwise to reduce the vertical scale and
counterclockwise to increase the vertical scale.
If the amplitude of the input waveform is a little bit greater than the full scale of
the current scale and the amplitude would be a little bit lower if the next scale is
used, fine adjustment can be used to improve the waveform display amplitude
to view signal details.
When modifying the vertical scale, the waveform of the corresponding channel will
be expanded or compressed vertically relative to the vertical reference currently
selected (refer to “To Specify the Vertical Reference”); the vertical scale
information (as shown in the figure below) in the channel status label at the bottom
of the screen will change in real time.
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