Convert Analog to Digital Express VI

LabView Acquire Signals Express VIs

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Convert Analog to Digital Express VI

Owning Palette: Processing Express VIs

Installed With: LabVIEW SignalExpress

Converts an analog waveform to a digital waveform.

Dialog Box Options
Block Diagram Inputs
Block Diagram Outputs
 Place on the block diagram  Find on the Functions palette

Dialog Box Options

ParameterDescription
Analog signal previewDisplays the analog waveform you want to convert into a digital waveform.
X scale sliderSelects the data displayed in the Digital waveform preview.
Signal name previewDisplays the signal names associated with the signals in the Digital waveform preview.
Digital waveform previewDisplays the digital waveform converted from the input analog waveform.
Digital preview Y scrollbarScrollbar that allows you to scroll through the Digital waveform preview.
InputContains the following options:
  • Input signal—Specifies the analog waveform for the step.
ConfigurationContains the following options:
  • Analog full scale—The total peak-to-peak range, or the difference between the minimum and maximum, for the analog waveform. For example, if the maximum range of a waveform is 1 and the minimum is -1, the full-scale range for the waveform is 2.
  • Resolution (bits)—Specifies the number of bits represented in the digital waveform. LabVIEW SignalExpress supports a maximum resolution of 32 bits.
  • Digital data format—Specifies which binary representation you want to use for the digital data.
    • Unsigned binary—The data is converted to unsigned binary.
    • Offset binary—The largest negative value (negative full-scale) is represented by all zeros, and the largest positive value (positive full-scale) is represented by all ones. Zero-scale is represented by a one (MSB) followed by all zeros, for example, binary 1000.
    • 2's complement—Uses two's complement format, which is a common format for representing signed binary values. This format is similar to Offset Binary, but the MSB is inverted.
  • Dithering enabled—Specifies whether the analog waveform can be dithered. Dithering a waveform adds Gaussian noise to an analog input signal to increase resolution.
Signal NamesContains the following options:
  • Signal names table—Allows you to specify custom names for your signals.
  • Reset to default—Specifies whether the Signal names are reset to their default states.

Block Diagram Inputs

ParameterDescription
error in (no error)Describes error conditions that occur before this VI or function runs.

Block Diagram Outputs

ParameterDescription
error outContains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error.
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