150 53220A/53230A User’s Guide
5 Triggering and Gating
The system trigger is configured using the commands within the TRIGger
and SAMPle subsystems. Figure 5-3 show the sequence in which the com-
mands are commonly used.
The system trigger source which starts the trigger/gate cycle is set with the
command:
TRIGger:SOURce {IMMediate|EXTernal|BUS}
TRIGger:SOURce? (query form)
- trigger source IMMediate sets a continuous trigger signal. By default, CON-
Figure sets the trigger source to IMMEDiate.
- trigger source EXTernal sets the trigger source to an external trigger applied
to the rear panel ‘Trig In’ BNC connector.
- trigger source BUS causes the instrument to be triggered by the *TRG com-
mand received over an IO interface.
Trigger Source Example
//configure for frequency, set system trigger parameters
CONF:FREQ 5E6,0.1,(@2)
TRIG:SOUR EXT // trigger source external
System Trigger Slope
When the system trigger source is set to EXTernal, the triggering slope (edge)
of the signal is set with the command:
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