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Inside the Sequence Operation State. Figure
l-39
illustrates the
operation of the sequence operation state.
The downward entrance to the Sequence Operation State signals
that some instrument dependent action should begin at once. An
upward exit is not allowed until the instrument signals that its
action is complete. Note that complete can be defined differently for
different instruments. For example, consider an instrument that can
sweep a range of frequencies starting with
fr
and ending with
fi.
The
action-complete signal can be defined to coincide with the output of
either
fr
or
f2.
Figure
l-39.
Inside the Sequence Operation State
Common Trigger
In the previous paragraphs, you learned about the basic building
Configurations
blocks allowed in a SCPI trigger system. Generally, an instrument
implements only a portion of the trigger features available. These
paragraphs discuss the simplest configurations:
INIT
and TRIG.
”
The INIT Configuration
The
INIT
configuration is the simplest possible trigger configuration.
It uses no event detection states, and requires only two subsystems
for programming,
INITiate
and
ABClRt
.
All SCPI instruments
implement these two subsystems
Getting Started Programming
l-109