Oscilloscope trigger type

Infineon / Mitsubishi / Fuji / Semikron / Eupec / IXYS

Oscilloscope trigger type

Posted Date: 2024-01-19

Oscilloscope trigger type

An oscilloscope is an instrument used to observe and measure electrical signals, and triggering is an important function of an oscilloscope. It is used to display waveforms in a stable manner, allowing users to accurately analyze and measure signals. The trigger type determines how the oscilloscope initiates waveform display through a specific trigger event. This article will introduce the triggering types of oscilloscopes in detail, detail and detail.

1. Free running trigger

Free-running triggers are one of the simplest and most common trigger types. In this trigger mode, the oscilloscope continuously displays the input signal without any trigger conditions. When the oscilloscope is in this mode, the user can see the continuous waveform of the signal, but there may be some unstable noise.

2. Edge trigger

Edge triggering is one of the most commonly used trigger types in oscilloscopes. It initiates the waveform display based on the edge of the signal (rising or falling edge). Users can use the oscilloscope's trigger control panel to select the polarity of the trigger edge and the amplitude range of the signal. Once the edge of the input signal meets the user-specified trigger condition, the oscilloscope triggers and displays the waveform.

3. Pulse width trigger

Pulse width triggering is a way to trigger an oscilloscope based on the pulse width of the input signal. It allows the user to specify the pulse width range of the input signal. Once the pulse width of the input signal meets the user-specified trigger condition, the oscilloscope will trigger and display the waveform. Pulse width triggering is often used to observe narrow pulse signals or waveforms with specific pulse widths.

4. Video trigger

Video triggering is a special trigger type used for analyzing video signals. It is often used for debugging video equipment or analyzing specific characteristics of video signals. Video triggering allows the user to select specific video signal properties, such as frame rate, field rate, or a specific number of lines, to trigger the display of waveforms.

5. Sequence triggering

Sequence triggering is an advanced trigger type that allows the user to trigger the oscilloscope based on specific patterns in a sequence of input signals. Users can set multiple trigger conditions in the input signal sequence, such as continuous trigger, alternate trigger or specific number trigger, etc. The oscilloscope will help users analyze complex signals by detecting specific patterns in input signal sequences to trigger and display waveforms.

6. Low frequency trigger

Low frequency trigger is a special trigger type used to trigger low frequency signals. It is usually used for triggering high-frequency noise signals to obtain more accurate waveform display in high-noise environments. Low frequency trigger allows the user to select the amplitude range of a low frequency signal to trigger the waveform display.

7. Frequency sweep trigger

Sweep trigger is a special trigger type used to trigger sweep-type signals such as swept radar or frequency sweep signals. It allows the user to select the start and end frequencies of the swept signal to trigger the oscilloscope's waveform display.


The above are some common trigger types for oscilloscopes, including free-running trigger, edge trigger, pulse width trigger, video trigger, sequence trigger, low frequency trigger and sweep trigger. Different trigger types are suitable for different types of signals and application scenarios. Users can select the appropriate trigger mode according to specific needs to obtain accurate waveform display and signal analysis.

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