Horizontal Control
3–56
TDS 420A, TDS 430A, TDS 460A & TDS 510A User Manual
To Change Horizontal Scale and Position
The Digitizing Oscilloscope provides control of horizontal position and scale
using either the horizontal front panel knobs or the horizontal menu. This section
describes how to use both the knobs and the menu to adjust your waveforms.
By changing the horizontal scale, you can focus on a particular portion of a
waveform. By adjusting the horizontal position, you can move the waveform
right or left to see different portions of the waveform.
NOTE. If external clock (TDS 400A only) is enabled and zoom is disabled, the
horizontal scale is set to 50 c (indicating 50 clocks per division) and the
Horizontal SCALE knob has no effect.
To change the horizontal scale and position:
1. Turn the horizontal SCALE and horizontal POSITION knobs (see
Figure 3–31).
2. If you want the POSITION knob to move faster, press the SHIFT button.
When you use the horizontal SCALE knob and select a channel, you scale all
channel waveforms displayed at the same time. If you select a math or reference
waveform, you scale only the selected waveform.
Figure 3–31: Horizontal Controls
When you use the horizontal POSITION knob and select a channel, you position
all channel, reference, and math waveforms displayed at the same time when
Horizontal Lock is set to All in the Zoom menu. For more information on zoom
see page 3–143.
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