B&K Precision 2542B-GEN - Manual - Manual (Page 35)

Basic Operation
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Note: Auto set function can be disabled. See
“Appendix B: Disabling Auto Function” for details
2.3 Vertical Controls
Vertical controls
Vertical Position Knob (CH1, CH2)
Turn the small vertical position knob above the channel key
to move the channel’s waveform and its ground level icon ( )
up or down on the display. The voltage value momentarily
displayed (shown below) in the bottom left corner of the
display represents the voltage difference between the vertical
center of the display and the ground level ( ).