RIGOL DS6000 Series - Manual (Page 64)

RIGOL 2 To Set the Vertical System
DS6000 User’s Guide 2-6
6. Bias Voltage
The oscilloscope provides bias voltage for differential probe. This bias voltage 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 completeness of the
signal under test. Press this softkey and use the knob to adjust the bias voltage.
The range is from -12V to +12V.