Extech Instruments 420 Specifications download pdf (Page 44)

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V5.1‐March2010

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Glossary of Terms

• Hold-off time: Programmable time period between trigger events (100ns default).

• Trigger modes: There are three trigger modes: Auto (acquires signal continuously),

Normal (acquires signal when trigger conditions are met) and Single (manually

triggers the signal).

• Automatic trigger mode: In this mode, the oscilloscope can acquire a waveform

without a triggering condition

• Normal trigger mode: In this mode, the oscilloscope cannot acquire the waveform

until it is triggered. When no trigger is present, the oscilloscope will display only the

original waveform; no new waveforms can be captured until a trigger is detected.

• Single mode: In this mode, the oscilloscope will detect a trigger and capture a

waveform each time the user presses the RUN/STOP key.

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Extech Instruments 420 Specifications Page 44