The trigger subsystem is used to synchronize device action(s) with events or 
in other words you program the comprehensive triggering capabilities of the 
instrument using the SCPI:ARM and :TRIGger subsystem. Using these 
two command subsystems you can program the operating modes of the 
instrument. More precise use the :ARM subsystem to the select the overall 
triggering mode of the instrument e.g. Continuous, External triggered, Gated, 
etc. and the trigger subsystem to select for example the number of pulse 
period. The following diagram illustrates the trigger model of 81150A / 
81160A.  
 
 
Modulation?
 
Sweep?
 
Do Modulation
 
Do Sweep
 
(F
Start 
-
> 
F
stop)
 
Always triggered!
 
Generate period / 
 
increment counter
 
Counter == 
NCYCles
 
Yes
 
 
 
Reset Counter
 
 
 
No
 
:TRIGger[1|2]:SOURce IMMediate
 
:TRIGger[1|2]:COUNt
 
:BURSt[1|2]:NCYCles / 
:BURSt[1|2]:STATe ON | OFF
 
:ARM:SOURce[1|2] IMM | INT1 |…
 
Armed?
 
 
 
No
No
Yes
No
Yes
Yes