RIGOL Chapter 2 Command System
2-44 MSO7000/DS7000 Programming Guide
:CHANnel<n>:PROBe:BIAS
:CHANnel<n>:PROBe:BIAS <bias>
:CHANnel<n>:PROBe:BIAS?
Sets or queries the probe bias voltage of the specified channel.
 This function is used to adjust the signal under test that exceeds the input dynamic
range of the probe amplifier to an appropriate range to ensure the signal integrity.
 This command is only valid when an active probe is correctly connected.
The query returns the probe bias voltage in scientific notation.
:CHANnel<n>:UNITs
:CHANnel<n>:UNITs <units>
:CHANnel<n>:UNITs?
Sets or queries the amplitude display unit of the specified analog channel.
{VOLTage|WATT|AMPere|UNKNown}
The query returns VOLT, WATT, AMP, or UNKN.
:CHANnel1:UNITs VOLTage /*Sets the amplitude display unit of CH1 to VOLTage.*/
:CHANnel1:UNITs? /*The query returns VOLT.*/
:CHANnel<n>:VERNier
:CHANnel<n>:VERNier <bool>
:CHANnel<n>:VERNier?
Enables or disables the fine adjustment of the vertical scale of the specified analog
channel; or queries the on/off status of the fine adjustment function of the vertical scale
of the specified analog channel.
By default, the fine adjustment is Off. At this time, you can set the vertical scale at 1-2-5
step, i.g. 10 mV, 20 mV, 50 mV, 100 mV……100 V. When the fine adjustment is enabled,
you can further adjust the vertical scale within a relatively smaller range to improve
vertical resolution. If the amplitude of the input waveform is a little bit greater than the
full scale under 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 amplitude of waveform display
to view signal details.