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Acquiring and Displaying Waveforms
TDS 500C, TDS 600B, & TDS 700C User Manual
3–51
To use Zoom, select a waveform, turn Zoom on, and magnify that waveform
using the vertical and horizontal scale knobs:
1. Press any of waveform selection buttons CH 1 through CH 4 on the right
side of the display. Or press MORE and select a math or reference waveform
from the More menu.
2. Press ZOOM.
Press ZOOM ➞ Mode (main) ➞ ON (side). The ZOOM front-panel button
should light up. Toggle Dual Zoom to OFF in the side menu.
3. Adjust the vertical zoom factor for the selected waveform using the vertical
SCALE knob. Adjust the vertical position of the zoomed waveform using
the vertical POSITION knob.
4. Adjust the horizontal zoom factor using the horizontal SCALE knob. Adjust
the horizontal position of the zoomed waveform using the horizontal
POSITION knob.
Depending on the selection for Horizontal Lock in the side menu, Zoom
affects the displayed waveforms as follows:
None — only the waveform currently selected can be magnified and
positioned horizontally (Figure 3–25).
Live — all “live” (as opposed to reference) waveforms can be magnified and
positioned horizontally at the same time. If a reference or math waveform is
selected and Horizontal Lock set to Live, only the selected reference or math
waveform is magnified and positioned.
All — all waveforms displayed (live, math, and reference) can be magnified
and positioned horizontally at the same time.
5. Press ZOOM ➞ Lock (main) ➞ All, Live, or None (side).
NOTE. Although Zoom must be turned on to control which waveforms Zoom
affects, the setting for Horizontal Lock affects which waveforms the horizontal
control positions whether Zoom is on or off. The rules for the three settings are
listed in step 4 on page 3–51.
Zoom a Waveform