Table Of Contents

IviScope Initiate Acquisition (G Dataflow)

Version:
    Last Modified: October 24, 2017

    Initiates a waveform acquisition. After you call this node, the oscilloscope leaves the Idle state and waits for a trigger. The oscilloscope acquires a waveform for each channel you have enabled with the IviScope Configure Channel Node.

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    instrument handle out

    The instrument handle that you obtain from the IviScope Initialize or IviScope Initialize With Options node. The handle identifies a particular instrument session.

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    instrument handle

    The instrument handle that you obtain from the IviScope Initialize or IviScope Initialize With Options node. The handle identifies a particular instrument session.

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    error out

    Error information.

    The node produces this output according to standard error behavior.

    Standard Error Behavior

    Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

    error in does not contain an error error in contains an error
    If no error occurred before the node runs, the node begins execution normally.

    If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

    If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.
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    error in

    Error conditions that occur before this node runs.

    The node responds to this input according to standard error behavior.

    Standard Error Behavior

    Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

    error in does not contain an error error in contains an error
    If no error occurred before the node runs, the node begins execution normally.

    If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

    If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

    Default: No error

    Check Instrument Status and IviScope Initiate Acquisition

    This node does not check the instrument status. Typically, you call this node only in a sequence of calls to other low-level driver nodes. The sequence performs one operation. You use the low-level nodes to optimize one or more aspects of interaction with the instrument. If you want to check the instrument status, call the IviScope Error-Query Node at the conclusion of the sequence.

    Interchangeability and Iviscope Initiate Acquisition

    This node performs interchangeability checking when the IviScope»Inherent IVI Settings»User Options»Interchange Check property is set to TRUE. If theIviScope»Inherent IVI Settings»User Options»Spy property is set to TRUE, you use the NI I/O Trace utility to view interchangeability warnings. You use the IviScope Get Next Interchange Warning Node to retrieve interchangeability warnings when the IviScope»Inherent IVI Settings»User Options»Spy property is set to FALSE. For more information about interchangeability checking, refer to the help text for the IviScope»Inherent IVI Settings»User Options»Interchange Check property.

    Configuring a Simulated Waveform

    The class driver performs a simulated waveform acquisition when this node is called and the IviScope»Inherent IVI Settings»User Options»Simulate property is set to TRUE and the IviScope»Inherent IVI Settings»User Options»Use Specific Simulation property is set to FALSE. For information on how to configure a simulated waveform, refer to the online help manual.

    Where This Node Can Run:

    Desktop OS: Windows

    FPGA: Not supported

    Web Server: Not supported in VIs that run in a web application


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