Table Of Contents

Auto Setup (G Dataflow)

Last Modified: March 3, 2017

Automatically configures the digitizer.

When you call this node, the digitizer senses the input signal and automatically configures many of the instrument settings. If a signal is detected on a channel, the driver chooses the smallest available vertical range that is larger than the signal range. For example, if the signal is a 1.2 Vpk-pk sine wave, and the device supports 1 V and 2V vertical ranges, the driver will choose the 2 V vertical range for that channel.

If no signal is found on any analog input channel, a warning is returned and all channels are enabled. A channel is considered to have a signal present if the signal is at least 10% of the smallest vertical range available for that channel.

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session in

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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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.

NI 5185 and 5186 Unique Behavior

Because NI 5185 and 5186 devices have two physical connectors (50 ohm input impedance, 1 Mohm input impedance) for each channel, this node has unique behavior for these devices.

When the user specifies an input impedance by using niScope Properties to set the input impedance on either channel or both channels: this node only searches for a signal on that input connector. If no signal is detected, NI-SCOPE returns a warning and both channels are enabled for the input impedance specified.

When the user does not specify an impedance, this node searches for a signal on both input connectors (first on the 50 ohm input connector, then on the 1 Mohm input connector). If NI-SCOPE detects a signal on the 50 ohm connector (default), then it uses that signal. If NI-SCOPE does not detect a signal on the 50 ohm connector, then it searches the 1 Mohm connector for a signal. If a signal is not detected on any connectors, NI-SCOPE returns a warning and both channels are enabled with 50 ohm impedance.

Settings Changed by Auto Setup

This node changes the following settings to the following values:

General Settings Value
Acquisition Mode Normal
Reference Clock Internal
Vertical Settings Value
Vertical Coupling AC (when AC is supported; otherwise DC)
Vertical Bandwidth Full
Vertical Range Changed by Auto Setup
Vertical Offset 0 V
Probe Attenuation Unchanged by Auto Setup
Input Impedance Unchanged by Auto Setup
Horizontal Settings Value
Sample Rate Changed by Auto Setup
Min Record Length Changed by Auto Setup
Enforce Realtime True
Number of Records 1
Triggering Settings Value
Trigger Type Edge if signal present, otherwise immediate.
Trigger Channel Lowest numbered channel with a signal present.
Trigger Slope Positive
Trigger Coupling DC
Reference Position 50%
Trigger Level 50% of signal on trigger channel
Trigger Delay 0
Trigger Holdoff 0
Trigger Output None

Where This Node Can Run:

Desktop OS: Windows

FPGA: Not supported


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