Tenma 72-14520 Instructions Manual page 5

DISPLAY SETTING CONTROLS
Vertical control panel
• 1 2 3 4: open or close the four channels display. Model dependent.
• MATH: Open the mathematical operations menu for add, subtract,
multiply, divide, FFT, filtering, logic, and advanced operations.
• REF: Recall previously stored reference waveforms, can compare
currently measured waveform with reference waveforms.
• VERTICAL POSITION CONTROL: Used to adjust the vertical
position of the current channel waveform. Press this knob to return
the channel display back to the midpoint position.
• VERTICAL SCALE CONTROL: Used to adjust the vertical scale of
the current waveform. The vertical scale has 1, 2, and 5 steps.
• Pressing the button allows the vertical adjustment to switch between coarse and
fine adjustment mode.
Level (horizontal) control panel
• Displays window extension, independent timing, and holdoff time.
• HORIZONTAL POSITION CONTROL: Adjusts the horizontal position
of the current channel waveform. Press this control to return the
channel display back to the midpoint position.
• HORIZONTAL SCALE CONTROL: Used to adjust the vertical scale of
the current waveform. The vertical scale has 1, 2, and 5 steps.
• Pressing the SCALE button allows the vertical adjustment to switch
between main and extensible window mode.
Trigger system
• TRIGGER LEVEL CONTROL: Adjusts the currently selected trigger level.
Press the control to return the trigger level back to the midpoint position.
• TRIG MENU: Press to display the trigger menu.
• FORCE: Press to generate a trigger event once.
• HELP: Displays built-in help system.
Auto Setting
• When this key is pressed, the oscilloscope will automatically
adjust the vertical scale factor, timebase, and trigger mode
according to the input signals.
Run/Stop
• Press the key to "run" or "stop" sampling. RUN state is indicated by green
light. STOP state is indicated by red light.
Single
• Set to single trigger mode. After the trigger point the oscilloscope
will stop sampling.
Clear
• Clear all waveforms. If the oscilloscope is in the "RUN" state, it will
continue to display new waveforms. The screen will momentarily clear if
in "stop" state when "run" is pressed and sampling re-starts.
Screen Copy
• Copy the screen to a BMP format image and store it to USB device.
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