B&K Precision 2542B-GEN - Manual - Manual (Page 36)

Basic Operation
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Press the vertical position knob to bring the channel’s
waveform and its ground level icon ( ) directly back to the
vertical center of the display.
Vertical Scale Control (CH1, CH2)
Turn the large vertical scale knob below the channel key to
set the scale factor for the channel. The vertical scale knob
changes the channel scale in a 1-2-5 step sequence. The
channel scale factor value is displayed in the bottom left
portion of the display.
Press the vertical scale knob to toggle between Fine and
Coarse control. When fine is selected, you can change the
channel’s vertical sensitivity in smaller resolution. When