Time Reference (t=0) (Playback Trigger)

Time Reference (t=0) sets the time reference for playback. This is what the t=0 location is and what time axis times are relative to during playback.

When Auto is true (checked), the time reference is automatically chosen. If the recording was made using a time reference of measurement start trigger, Auto Time Reference will choose Recording Trigger, otherwise it will choose Playback Trigger.

Playback trigger - The time reference is the playback data acquisition trigger.

Recording Trigger - The time reference is the recording trigger (the trigger location in the recording file).