Programming the DC Source - 7

Triggering Output Changes

The dc source has two independent trigger systems. One is used for synchronizing output changes, and the other is used for synchronizing 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 Model

Figure 7-1 is a model of the output trigger system. The rectangular boxes represent states. Arrows show the transitions between states. These are labeled with the input or event that causes the transition to occur.

 

 

ABORt

INITiate:CONTinuous OFF

IDLE STATE

*RST

 

 

*RCL

 

INITiate[:IMMediate]

 

INITiate:CONTinuous ON

INITIATED STATE

TRIGGER RECEIVED

OUTPUT

LEVEL

CHANGE

Figure 7-1. Model of Output Trigger System

Setting the Voltage or Current Transient 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:

VOLT:TRIG <n>

VOLT2:TRIG <n> for models that have a second output

CURR:TRIG <n>

CURR2:TRIG <n> for models that have a second output

NOTE: Until they are programmed, trigger levels will be the same as the corresponding voltage or current levels. For example, if a dc source is powered up and the voltage is programmed to 6, the trigger level is also set to 6. Once you program a trigger level, it will stay at that value until the output is changed by a transient trigger or reprogrammed.

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Agilent Technologies 66311B, D, 66309B, 66111A Triggering Output Changes, Scpi Triggering Nomenclature, Output Trigger Model
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66111A, 66309B, 66311B, D specifications

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