Horizontal and acquisition setups Enable Roll mode
To use
Click Run/Stop to toggle w aveform acquisition. (You can also press the front panel Run/Stop button.)
Click Single Sequence to complete a single acquisition sequence.
Click Force Trigger to immediately start acquiring waveform data without a valid trigger event.
Behavior
These controls operate identically to the front-panel controls.
Click Run/Stop once to stop waveform acquisition. The Status readout at the top of the graticule
changes from Running to Stopped and shows t
he number of acquisitions. Click Run/Stop again to
resume waveform acquisition.
Click Single Sequence to provide a single sequence of acquisitions each time you click the button.
When Single Sequence is enabled, the front-panel single sequence (Single) button is lighted.
In Sample, Peak Detect, or Hi Res acquisition mode s, the instrument acquires waveform records with
the first valid trigger event and then s tops. In Average or Envelope acquisition modes, the instrument
makes the specified number of acquisitions to complete the averaging or enveloping task.
In Waveform Database mode, the instrument acquires and d isplays a waveform that is the
accumulation of several acquisitions. In addition to time and amplitude, the waveform displays a count
of the number of times a specific sample point has been acquired.
When you click Single Sequence (or press the Single button) in Equivalent Time mode, the instrument
continues to recognize trigger events and acquires samples until the waveform record is filled.
Click Force Trigger o nce to acquire a waveform record without a tri
gger event. Forcing a trigger is
useful when the input signal does not contain a valid trigger. The instrument recognizes and acts
upon the forced trigger even when you click the button before the end of the pretrigger holdoff. The
button has no effect when acquisitions are stopped.
What do you want to do next?
Go to the Horizon
tal/Acquisition control window.
(see page 177)
Return to the Acquisition Setup control window. (see page 181)
Return to the Trigger Setup control window. (see page 385)
Enable Roll mode
From the Horiz /Acq menu, select Roll Mode Auto, or click Roll Mode in the Acquisition tab of the
Horizontal/Acquisition control w indow
(see page 181).
Overview
Use these controls to turn Roll Mode on or off.
188 DSA/DPO70000D, MSO/DPO/DSA70000C, DPO7000C, and MSO/DPO5000 Series
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