Tektronix TBS2072, Руководство пользователя

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Trigger setup
Setting the trigger mode
Use this procedure to set the oscilloscope trigger Mode . The trigger mode sets how the oscilloscope behaves in the absence
or presence of a trigger. Trigger mode also enables the trigger holdoff function. (See page 28, Trigger modes .)
Trigger mode does not set the trigger conditions; those are set with the Trigger Type side-menu buttons.
1. Push the Trigger Menu front-panel button.
2. Push the Mode side-menu button.
3. Use the Multipurpose knob to select and click a trigger mode or holdoff mode:
Click Auto (Untriggered Roll) to set the oscilloscope to acquire and display a waveform even if a trigger does not
occur. If there is no valid triggering event, the waveform will appear to roll across the screen.(See page 28, Auto
(Untriggered Roll) trigger mode .)
Click Normal to set the oscilloscope to acquire and display a waveform only when a valid trigger event occurs. (See
page 29, Normal trigger mode .)
Click Holdoff to set a time period after a trigger event, during which the oscilloscope ignores new trigger events. Once
the holdoff period is over, the oscilloscope starts looking for the trigger condition. The minimum holdoff period is
20 ns. (See page 29,
Holdoff trigger mode .)
TBS2000 Series User Manual 39