User`s guide

12 Controls and Connectors
360 InfiniiVision Oscilloscopes User’s Guide
18. Horizontal Controls
Horizontal Sweep Speed Control Turn the knob in the Horizontal section that is
marked to adjust the sweep speed. The symbols under the knob indicate that this
control has the effect of spreading out or zooming in on the waveform using the
horizontal scale. The horizontal sweep speed control changes the time per horizontal
division on the display. For more information see “To set up the Horizontal time base” on
page 64.
Horizontal Position Control Turn the knob marked to pan through the waveform
data horizontally. You can see the captured waveform before the trigger (turn the knob
clockwise) or after the trigger (turn the knob counterclockwise). If you pan through the
waveform when the oscilloscope is stopped (not in Run mode) then you are looking at the
waveform data from the last acquisition taken. See “To set up the Horizontal time
base” on page 64.
Horizontal [Menu/Zoom] Key (or [Main/Delayed] Key on some oscilloscopes)
Press this key to access the menu where you can split the oscilloscope display into
Normal and Zoom sections, and where you can select XY and Roll modes. You can also
select horizontal time/division fine adjustment and select the trigger time reference point
on this menu. See “To set up the Horizontal time base” on page 64.
19. Display The display shows captured waveforms using a different color for each
channel. For more information about display modes see Chapter 5, “Displaying,” starting
on page 173. Signal detail is displayed using 256 levels of intensity. For more information
about viewing signal detail see “Waveform Intensity and Signal Detail” on page 180.
20. [AutoScale] Key When you press the [AutoScale] key the oscilloscope will
quickly determine which channels have activity, and it will turn these channels on and
scale them to display the input signals. See “AutoScale” on page 177
21. Entry Knob The entry knob is used to select items from menus and to change
values. Its function changes based upon which menu is displayed. Note that the curved
arrow symbol above the entry knob illuminates whenever the entry knob can be used
to select a value. Rotate and push the entry knob to select among the choices that are
shown on the softkeys. More information about the Entry knob is on page 53.