Basic Operation
QC1936 Digital Storage Oscilloscope 12
2.6.1 Horizontal control knob
The horizontal knob [SEC/DIV] changes the horizontal scale (time base), and the [POSITION]
knob changes the horizontal position (triggered displacement) triggered in the internal memory.
The center of the screen in the horizontal direction is a time reference point of the waveform.
Change of the horizontal scale will cause expansion or contraction of the waveform relative to the
center of the screen, while the change of the horizontal position is relative to the position of a
trigger point.
Horizontal POSITION knob
1. Regulate the horizontal position (trigger the position relative to the center of the display screen)
of the waveform (including MATH). The resolution of this control knob is changed according to
the time base.
2. Use the press down function of this knob to make the horizontal displacement return to zero,
namely back to the central position of the screen.
[SEC/DIV] knob
1. The knob is used for changing the horizontal time scale so as to conveniently observe the most
suitable waveform.
2. The knob is used for regulating the main time base. When the window expansion mode is
adopted, the knob is used for changing the expansion time base so as to change the window
width.
Each option in HORIZ MENU is described as follows.
Press [SEC/DIV] key to display the horizontal menu “HORI MENU”, and window expansion can be
implemented at this menu.
Major Window
Minor Window
Selects the major or minor window in dual-window mode. The
window is highlighted once selected. Press this option button
in single-window mode to enter the daul-window mode.
Right arrow
Left arrow
Set/Clear
Clear All
This function is usable only in dual-window mode. It sets
marks at some waveform record locations that users are
interested in, and searches for these marks by right and left
arrows. Then it positions the window to this mark for further
observation.
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