Keysight Technologies InfiniiVision 3000T X Series - Trigger Event Register (TER)

Status Reporting 39
Keysight InfiniiVision 3000T X-Series Oscilloscopes Programmer's Guide 1249
Trigger Event Register (TER)
This register sets the TRG bit in the status byte when a trigger event occurs.
The TER event register stays set until it is cleared by reading the register or using
the *CLS command. If your application needs to detect multiple triggers, the TER
event register must be cleared after each one.
If you are using the Service Request to interrupt a program or controller operation,
you must clear the event register each time the trigger bit is set.