You can determine the current state of an acquisition by looking at the acquisition status icon, located in the Horizontal & Acq. header of an oscilloscope panel.
Triggered—The device met the trigger condition and performed an acquisition based on the specified trigger settings.
Auto—After a certain amount of time has passed without a trigger firing, the device automatically triggers an acquisition. The Auto status displays briefly when this occurs.
The trigger mode must be set to Auto to enable automatic triggering.
Waiting—The device is waiting to take an acquisition until the trigger condition has been met.
Stopped—The instrument is not running.