231
Chapter 4 Remote Interface Reference
Triggering Commands
4
Triggering Commands
Applies to Sweep and Burst only. See also “Triggering” starting on
page 115 in chapter 3.
TRIGger:SOURce {IMMediate|EXTernal|BUS}
TRIGger:SOURce?
Select the source from which the function generator will accept a trigger.
The function generator will accept an immediate internal trigger,
a hardware trigger from the rear-panel Trig In connector, or a software
(bus) trigger. The default is IMM. The :SOUR? query returns “IMM”,
“EXT”, or “BUS”
•
When the
Immediate
(internal) source is selected,
the function
generator outputs continuously when the sweep mode or burst mode
is enabled.
•When the External source is selected, the function generator will
accept a hardware trigger applied to the rear-panel Trig In connector.
The function generator initiates one sweep or outputs one burst each
time Trig In receives a TTL pulse with the edge polarity specified by
the TRIG:SLOP command (see page 232).
•When the Bus (software) source is selected, the function generator
initiates one sweep or outputs one burst each time a bus trigger
command is received. To trigger the function generator from the
remote interface (GPIB, USB, or LAN) when the Bus source selected,
send the *TRG (trigger) command. The front-panel key
is
illuminated when the function generator is waiting for a bus trigger.
•The APPLy command automatically sets the trigger source to
Immediate (equivalent to TRIG:SOUR IMM command).
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