User`s guide

186
Using the Oscilloscope
The Scope Marker Menu
Overlay and waveform math traces cannot be selected for voltage
marker placement.
The Vb On field works similarly.
Va Volts field
The Va marker is shown on the waveform display as a horizontal
dashed line. The voltage displayed in the Va Volts field is measured
relative to the zero-volt reference for this channel.
When you select the Va Volts field, you can change the voltage value by
turning the knob or by entering a voltage value from the pop-up
keypad. The range of voltage levels for the Va Volts field is +/-2 times
maximum range for the selected channel. The maximum range value is
affected by the probe factor and v/div settings.
The Vb Volts field works similarly.
Va to Vb field
This field displays the difference between the Va and Vb markers. This
value is dependent on channel selections and represents Vb minus Va.
Center Screen Field
The Center Screen field appears on the right side of the Marker menu.
The Center Screen field centers the screen on the chosen timebase
marker.
If time markers are turned off, the only marker choice available on the
Center screen pop-up will be the trigger marker. If time markers are
turned on, the Tx and To markers will also appear in the Center Screen
pop-up menu. If the auto time markers are enabled, only the trigger
marker appears in the Center Screen pop-up menu.