• Common = (A + B)/2
Adjusting the Differential or Common settings affects the A and B settings
• A = Common + (Differential/2)
• B = Common – (Differential/2)
The oscilloscope vertical channel offset control also adjusts the selected Input mode offset voltage field.
Auto Offset voltage set buttons
The probe A and B signal inputs are sensed, monitored, and averaged by probe internal circuitry and the sensed values are
used by the automatic offset voltage control buttons Auto Offset Mode button.
Auto in Common. Auto. This
selection selects the common
value Auto Offset mode. When
this mode is selected and the
Auto Offset button is pushed, the
A and B offset fields are both set
to the mean value between the A
and B signal levels.
Auto Individually. Click this
selection to select the individual
value Auto Offset mode. When
this mode is selected and the
Auto Offset button is pushed,
Offset A offset is set to the
average value of the A signal and
Offset B is set to the average
value of the B signal.
Manual. Use this selection to set
the Common Mode Offset value.
Auto Offset
Push this button to initiate a momentary Auto Offset cycle. The Offset A and Offset B values are automatically set based on
the selected Auto Offset mode and the A and B signal input voltages.
Basic operation
P7700 Series TriMode™ Probes 21
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