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TDS 620A, 640A, & 644A User Manual
Scaling and Positioning Waveforms
Scaling and positioning waveforms means increasing or decreasing their
displayed size and moving them up, down, right, and left on the display.
Two display icons, the channel reference indicator and the record view, help
you quickly see the position of the waveform in the display (see Figure 2-8).
The channel reference icon points to the ground of the waveform record when
offset is set to 0 V. This is the point about which the waveform contracts or
expands when the vertical scale is changed. The record view, at the top of the
display, indicates where the trigger occurs and what part of the waveform
record is displayed.
Original Position Positioned Vertically Positioned Horizontally
Original Scale Scaled Horizontally
Record View
Channel Reference Icon
Scaled
Vertically
Figure 2-8: Scaling and Positioning