40 Infiniium Z-Series Oscilloscopes User’s Guide
2 Using the Oscilloscope
Adjusting the horizontal scale
The horizontal scale knob is the larger of the two horizontal control knobs, marked
with a set of sine wave symbols.
• To stretch the waveform horizontally, turn the horizontal scale knob clockwise.
To shrink it horizontally, turn the knob counter-clockwise.
Stretching the waveform means fewer seconds are displayed per division.
Shrinking it means more seconds are displayed per division.
• Push and turn the horizontal scale knob to change the scaling in finer (Vernier)
increments.
• Use the multi-touch gesture capability to stretch or shrink the waveform.
• You can also use the controls in the horizontal toolbar to adjust the horizontal
scale. Mouse over or touch the horizontal scale field and use the resulting
controls to set an exact horizontal scale. You can click the Scale field to enter an
exact value, or click the “narrower” or “wider” buttons.
Adjusting the horizontal trigger position (delay)
The horizontal position knob is the smaller of the two horizontal control knobs,
marked with a set of arrows.
• To move the waveform to the right, turn the horizontal position knob clockwise.
To move it to the left, turn the knob counter-clockwise.
Moving the waveform to the right shows more of the pre-trigger data (data
acquired before the trigger event). Moving the waveform to the left shows more
of the post-trigger data.
When you click and drag the desired waveform, the horizontal position will
change for all channels and functions on the display. Waveform memories will
also move if you check the Tie to Timebase box in the Waveform Memories
dialog box.
• You can also use the controls in the horizontal toolbar to adjust the horizontal
position. Mouse over the horizontal position field and use the resulting controls
to set a particular horizontal position (time relative to the trigger at the
highlighted horizontal reference point).
Magnifying a part of the waveform using Zoom
• To turn on zoom, press the key or click the Zoom button.
The waveform display area splits into two regions. The top one is the main
timebase. The bottom is the zoomed timebase, which represents an expansion
of the acquired waveform data. A section of the waveform in the main timebase
window is highlighted to indicate the part shown in the zoomed timebase
window.
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