GW Instek GDS-2000A series User Manual - Manual (Page 141)

CONFIGURATION
141
Expand by Ground/Center
Background When the voltage scale is changed, the Expand
function designates whether the signal expands
from the center of the signal or from the signal
ground level. Expand by center can be used to
easily see if a signal has a voltage bias. Expand by
ground is the default setting.
Panel Operation 1. Press a channel key.
CH1
2. Press Expand repeatedly to toggle
between expand By Ground and
Center.
Range By Ground, By Center
Example If the vertical scale is changed when the Expand
function is set to ground, the signal will expand
from the ground level*. The ground level does not
change when the vertical scale is changed.
If the vertical scale is changed when the Expand
function is set to center, the signal will expand
from the center of the signal. The ground level will
suit to match the signal position.
*Or from the upper or lower edge of the screen if
the ground level is off screen.