TRIGger Subsystem Introduction
Parameter Typical Return
0 to 1000 s, in resolution of 4 ns; default 0 +1.050000000000000E-01
Set channel 1 trigger delay to 105 ms:
TRIG:DEL 105e-3
l Can be used with IMMediate, EXTernal, or BUS trigger source (TRIGger[1|2]:SOURce).
TRIGger[1|2]:SLOPe {POSitive|NEGative}
TRIGger[1|2]:SLOPe?
Specifies polarity of trigger signal on rear-panel Trig In connector for any externally-triggered mode.
Parameter Typical Return
{POSitive|NEGative}, default POS (rising edge) POS or NEG
Set trigger slope to falling edge:
TRIG:SLOP NEG
TRIGger[1|2]:SOURce {IMMediate|EXTernal|TIMer|BUS}
TRIGger[1|2]:SOURce?
Selects the trigger source for sequence, list, burst or sweep. The instrument accepts an immediate or timed internal
trigger, an external hardware trigger from the rear-panel Ext Trig connector, or a software (bus) trigger.
Parameter Typical Return
{IMMediate|EXTernal|TIMer|BUS}, default IMMediate IMM, EXT, TIM, BUS
Select external trigger source (trigger each time a low-true TTL pulse is received on the rear-panel trigger input):
TRIG:SOUR EXT
In triggered burst mode:
l The instrument outputs a waveform of the specified number of cycles (burst count) when a trigger received. After
the specified number of cycles have been output, the instrument stops and waits for next trigger.
l IMMediate (internal): the instrument outputs continuously when burst mode is enabled. The rate at which the
burst is generated is determined by BURSt:INTernal:PERiod.
l EXTernal: the instrument accepts a hardware trigger at the rear-panel Ext Trig connector. The instrument out-
puts one burst of the specified number of cycles each time Ext Trig receives a TTL pulse with the proper polarity
(TRIGger[1|2]:SLOPe). External trigger signals during a burst are ignored.
l BUS (software): the instrument initiates one burst each time a bus trigger (*TRG) is received. The front-panel
Trigger key is illuminated when the instrument is waiting for a bus trigger.
l EXTernal or BUS: burst count and burst phase remain in effect, but burst period is ignored.
l TIMer: trigger events are spaced by a timer, with the first trigger as soon as INIT occurs.
In frequency sweep mode:
Agilent 33500 Series Operating and Service Guide 317
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