Agilent Technologies 16533A 1-GSa/s Programmer's Manual page 106

Query
For EDGE trigger mode:
:TRIGger:[MODE EDGE;SOUR {CHAN<N>|EXT};]LEVel?
For PATTern trigger mode:
:TRIGger:[MODE PATT;PATH {CHAN<N>|EXT};]LEVel?
The LEVel query returns the trigger level for the current path or source.
Returned Format
[:TRIGger:LEVel] <value><NL>
Example
For EDGE trigger mode:
OUTPUT XXX;":TRIGGER:SOURCE CHANNEL1;LEVEL?"
For PATTern trigger mode:
OUTPUT XXX;":TRIGGER:PATH CHANNEL1;LEVEL?"
TRIGger Subsystem
LEVel
9–9