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Configure Trigger Multimode Function (Analog » Hysteresis) (G Dataflow)

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    Last Modified: March 3, 2017

    Configures common properties for hysteresis triggering.

    This kind of trigger specifies an additional value in the hysteresis parameter, that a signal must pass through before a trigger can occur. This additional value acts as a buffer zone that keeps noise from triggering an acquisition.

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    session out

    Identifies a particular instrument session.

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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

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    trigger source

    The source you want the digitizer to monitor for a trigger.

    Name Description
    Channel 0 Monitors Channel 0 for a trigger signal.
    Channel 1 Monitors Channel 1 for a trigger signal.
    Channel 2 Monitors Channel 2 for a trigger signal.
    Channel 3 Monitors Channel 3 for a trigger signal.
    Channel 4 Monitors Channel 4 for a trigger signal.
    Channel 5 Monitors Channel 5 for a trigger signal.
    Channel 6 Monitors Channel 6 for a trigger signal.
    Channel 7 Monitors Channel 7 for a trigger signal.
    External TRIG Monitors an external trigger input for a trigger signal.

    Default: Channel 0

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    trigger level

    The voltage threshold for the trigger.

    Default: 0.00

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    hysteresis

    The size, in volts, of the hysteresis window on either side of the trigger level.

    The digitizer triggers when the trigger signal passes through the hysteresis value you specify with this parameter, has the slope you specify with trigger slope, and passes through trigger level.

    Valid Values for Hysteresis

    Default Value 0.05 V
    Minimum Value 0
    Positive Trigger Slope Maximum Value hysteresis - trigger level ≥ -(vertical range/2) + vertical offset
    Negative Trigger Slope Maximum Value hysteresis + trigger level ≤ (vertical range/2) + vertical offset
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    trigger slope

    The trigger edge on which to trigger the digitizer.

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    trigger coupling

    The method used to couple the trigger signal.

    Name Value Description
    AC 0 Couples the trigger signal with an AC current.
    DC 1 Couples the trigger signal with a DC current.
    HF Reject 3 Couples the trigger signal with a high frequency reject filter.
    LF Reject 4 Couples the trigger signal with a low frequency reject filter.
    AC Plus HF Reject 1001 Couples the trigger signal with an AC current and a high frequency reject filter.

    Default: DC

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    trigger holdoff

    The length of time the digitizer waits after detecting a trigger before enabling NI-SCOPE to detect another trigger.

    Default: 0.00

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    trigger delay

    The length of time the digitizer waits after it receives the trigger to start acquiring data.

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    session out

    Passes the instrument handle to the next node in the program. This parameter has the same value as session in.

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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.

    Where This Node Can Run:

    Desktop OS: Windows

    FPGA: Not supported


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