Keysight InfiniiVision HD3 Series - Page 49

Horizontal Controls 2
Keysight InfiniiVision HD3-Series Oscilloscopes User's Guide 49
To turn on (or off) Zoom:
1 Press the [Zoom] key (or select Zoom in the Horizontal dialog box).
The area of the normal display that is expanded is outlined with a box. The box
shows the portion of the normal sweep that is expanded in the lower window.
To change the time/div for the Zoom window, turn the horizontal scale (sweep
speed) knob. As you turn the knob, the zoomed window time/div is highlighted in
the Horizontal badge. The Horizontal scale (sweep speed) knob controls the size of
the box.
The Horizontal position (delay time) knob sets the left-to-right position of the
zoom window. The delay value, which is the time displayed relative to the trigger
point) is momentarily displayed in the upper-right portion of the display when the
delay time ( ) knob is turned.
Negative delay values indicate you are looking at a portion of the waveform before
the trigger event, and positive values indicate you're looking at the waveform after
the trigger event.
To change the time/div of the normal window, turn off Zoom; then, turn the
horizontal scale (sweep speed) knob.
These box edges show
the beginning and end
of the Zoom window
Normal
window
Time/div
for zoomed
window
Time/div
for normal
window
Zoom
window
Signal
anomaly
expanded
in zoom
window