sweep to jump to the next point when the signal becomes TRUE,
therefore the first point in the list or stepped sweeps is produced
immediately upon starting the sweep. Receiving a trigger signal at
the last point causes the IDLE state to be re-entered. Analog sweeps
do not use the trigger signals during the sweep (although the trigger
signals are needed to start the sweep as described).
The ABORt command resets any sweep in progress and immediately
returns the instrument to the IDLE state.
The
*WAI,
*OPC
and *OPC? commands indicate a complete operation
at the end of the sweep upon re-entry into the IDLE state.
Advanced Trigger Configurations
Because the SCPI layered trigger model is expandable, many more
complex trigger configurations are possible.
Trigger Keyword
The following paragraphs contain condensed definitions of the
Definitions
keywords used in the command tables. Many of the commands in
trigger related subsystems are event commancts. Remember that
event commands cannot be queried. Similarly, event commands
have no related
*RST
actions or settings. Event commands cause a
particular action to take place inside the swept signal generator.
ABORt
The ABORt command forces the trigger system to the idle state. Any
measurement or output sequence in process is aborted as quickly as
possible. ABORt does not alter the settings programmed by other
commands, unlike *RST. ABORt is a root level event command and
cannot be queried.
IMMediate
The IMMediate command provides a one-time override of the normal
downward path in an event-detection state. The instrument must be
in the specified event detection state when IMMediate is received, or
an error is generated and the command has no effect. For example,
the instrument must be in the TRIG state for
:TRIGger:
IMMediate
to work properly. If the instrument is in the idle state, the command
has no effect, and an error would be generated. IMMediate is an
event command and cannot be queried.
ODELay
The
ODELay
command specifies the time between the source
settling and the time the trigger out signal is sent. Specifying
:TRIGger:ODELay
<num>(time
suffix) instructs the swept
signal generator to set the specified time as the delay necessary to
ensure proper settling. Sending *RST sets
ODELay
to an instrument
dependent value, usually zero.
1-l
18
Getting Started Programming
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