NI Signal Generators Help (NI-FGEN 18.1)

Edition Date: April 2018

Part Number: 370524V-01

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ViStatus niFgen_SendSoftwareEdgeTrigger (ViSession vi, viInt32 trigger, viConstString triggerID);


Sends a command to trigger the signal generator. This VI can act as an override for an external edge trigger.

Note Note  This VI does not override external digital edge triggers of the NI 5401/5411/5431.


Name Type Description
vi ViSession Identifies your instrument session. vi is obtained from the niFgen_init, niFgen_InitWithOptions, or niFgen_InitializeWithChannels functions and identifies a particular instrument session.
trigger ViInt32 Specifies the type of trigger to send.

Defined Values

NIFGEN_VAL_START_TRIGGERTransitions the device from an Idle state to a Generation state where the device can respond to Sample clocks.
NIFGEN_VAL_SCRIPT_TRIGGERAllows you to create sophisticated generation operations that are determined by the generation script.


triggerID ViConstString Identifies the specific trigger to use.

Defined Values

"ScriptTrigger0"Script Trigger 0
"ScriptTrigger1"Script Trigger 1
"ScriptTrigger2"Script Trigger 2
"ScriptTrigger3"Script Trigger 3

Default Value: "None"

Return Value

Name Type Description
status ViStatus Returns the status code of this operation. The status code either indicates success or describes an error or warning condition. You can examine the status code from each call to an NI-FGEN function to determine if an error occurred. To obtain a text description of the status code, call the niFgen_error_message function. To obtain additional information about the error condition, call the niFgen_GetError function. To clear the error information from NI-FGEN, call the niFgen_ClearError function.

The general meaning of the status code is as follows:

Value Meaning
0 Success
Positive Values Warnings
Negative Values Errors


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