RIGOL MSO/DS2000A Series - Manual (Page 284)

RIGOL Chapter 15 System Function Setting
MSO2000A/DS2000A User’s Guide 15-16
Aux Output
Users can set the type of the signal output from the [Trigger Out] connector at the
rear panel.
Press Utility  AuxOutput to select the desired output type.
 TrigOut
After this type is selected, the oscilloscope outputs a signal that can reflect the
current capture rate of the oscilloscope at each trigger. Connect this signal to a
waveform display device, measure the signal frequency and the measurement
result equals the current acquisition rate.
 PassFail
After this type is selected, the oscilloscope will output a pulse signal from the
[Trigger Out] connector at the rear panel when failed waveforms are detected.