TRIGger Subsystem Introduction
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IMMediate (internal):
the instrument outputs continuously when the sweep is enabled. The period at which
the sweep is generated is the sweep time (
) plus 1 ms.
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EXTERNAL:
the instrument accepts a hardware trigger at the rear-panel
Ext Trig
connector. The instrument ini-
tiates one sweep each time
Trig In
receives a TTL pulse of proper edge polarity (
). The trigger
period must be at least sweep time (
) plus 1 ms.
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BUS (software):
the instrument initiates one sweep each time a bus trigger (
) is received. The front-panel
Trigger
key is illuminated when the instrument is waiting for a bus trigger.
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sets trigger source to IMMediate.
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To ensure synchronization with BUS source, send
(wait) so the instrument waits for all pending operations
to complete before executing any additional commands. For example, the following command string guarantees
that the first trigger is accepted and the operation is executed before second trigger is recognized.
TRIG:SOUR BUS;*TRG;*WAI;*TRG;*WAI
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Use
or
to determine when the sweep or burst is complete. The *OPC? query returns 1 to the output
buffer when the sweep or burst is complete. The *OPC command sets the Operation Complete bit (bit 0) in the
Standard Event register when the sweep or burst is complete.
TRIGger[1|2]:TIMer {<
seconds
>|MINimum|MAXimum} TRIGger[1|2]:TIMer? {MINi-
mum|MAXimum}
Sets timer used when
is TIMer.
Parameter
Typical Return
1 µs to 8,000 s
+3.000000000000000E-01
Set trigger timer to 300 ms on channel 2:
TRIG2:TIM 0.3
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In triggered burst mode (
), this command supersedes
318
Agilent 33500 Series Operating and Service Guide
