Tektronix MDO3 Series, Инструкция по установке и безопасности

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3. Trigger controls:
■ Force forces a trigger event at a random point in the waveform and captures the acquisition.
■ Level sets the amplitude level that the signal must pass through to be considered a valid transition. The color of the
Level knob indicates the trigger source except for dual-level triggers. The Level knob is disabled when the trigger type
requires two level settings or other trigger qualifiers (set from the Trigger configuration menu). Push the knob to set the
threshold level to 50% of the peak-to-peak amplitude range of the signal.
■ Slope sets the signal transition direction to detect for a trigger (low to high, high to low, or either direction). Push the
button to cycle through the selections. The Slope button is disabled when the trigger type requires other slope
qualifiers (set from the Trigger configuration menu).
■ Mode sets how the instrument behaves in the absence or presence of a trigger event:
■
Auto trigger mode enables the instrument to acquire and display a waveform whether or not a trigger event
occurs. If a trigger event occurs, the instrument displays a stable waveform. If a trigger event does not occur, the
instrument forces a trigger event and acquisition and displays an unstable waveform.
■
Normal trigger mode sets the instrument to acquire and display a waveform only when there is a valid trigger
event. If no trigger occurs, the last waveform record acquired remains on the display. If no last waveform exists,
no waveform is displayed.
Getting acquainted with your instrument
MDO32, MDO34 Installation and Safety Manual 11
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