Triggering Output Changes; Scpi Triggering Nomenclature; Output Trigger System Model; Setting The Voltage Or Current Trigger Levels - Agilent Technologies 66312A Programming Manual

Triggering Output Changes

The dc source has two independent trigger systems. One is used for generating output changes, and the
other is used for triggering measurements. This section describes the output trigger system. The
measurement trigger system is described under "Triggering Measurements".

SCPI Triggering Nomenclature

In SCPI terms, trigger systems are called sequences. When more than one trigger system exists, they are
differentiated by naming them SEQuence1 and SEQuence2. SEQuence1 is the transient trigger system
and SEQuence2 is the measurement trigger system. The dc source uses aliases with more descriptive
names for these sequences. These aliases can be used instead of the sequence forms.
Sequence Form Alias
SEQuence1 TRANsient
SEQuence2 ACQuire

Output Trigger System Model

Figure 3-1 is a model of the output trigger system. The rectangular boxes represent states. The arrows
show the transitions between states. These are labeled with the input or event that causes the transition
to occur.
INITiate:CONTinuous OFF
INITiate:CONTinuous ON

Setting the Voltage or Current Trigger Levels

To program output trigger levels, you must first specify a voltage or current trigger level that the output will
go to once a trigger signal is received. Use the following commands to set the output trigger level:
VOLTage:TRIGgered <n>
CURRent:TRIGgered <n>
NOTE: Until they are programmed, uninitialized trigger levels will assume their corresponding
immediate levels. For example, if a dc source is powered up and VOLTage:LEVel is
programmed to 6, then VOLTage:LEVel:TRIGger will also be 6 until you program it to
another value. Once you program VOLTage:LEVel:TRIGger to a value, it will remain at
that value regardless of how you subsequently reprogram VOLTage:LEVel.
Figure 3-1. Model of Output Triggers
or
Programming the DC Source - 3
IDLE STATE
INITiate[:IMMediate]
INITIATED STATE
TRIGGER RECEIVED
OUTPUT
LEVEL
CHANGE
ABORt
*RST
*RCL
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