MSO44 scope SCPI trigger questions

TRIGger:{A|B}:LOGIc:DELTatime

What's the difference between Trigger "A" and "B" above?

How do I change the trigger source to say Ch3 with level "set to 50%"?

Hi,

You can use the A and B triggers to set up triggering on sequential events for example, where the A trigger acts as a qualifier. You can read more about their dual usage in page 134 of the MSO 4 series user manual.

As for the SCPI commands you are looking for;

• Setting trigger source to channel 3 (example using edge trigger type):

TRIGger:{A|B}:EDGE:SOUrce CH3
 

• Setting trigger level to 50% can be done with;

TRIGger:{A|B|B:RESET} SETLevel

Furthermore, if you want to know what the trigger parameters are after setting it to 50%, you can also query using (example using trigger A):
TRIGger:A?

-Iris