National Instruments SCXI -1125 用户手册

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You cannot mix virtual channels with the SCXI channel strings shown in the 

previous section.

To create a virtual channel for the SCXI-1125, insert a new analog input 
channel in the Data Neighborhood path in MAX, name it, and then follow 
the software prompts to create virtual temperature channels, voltage 
channels, or customized analog input channels. For more information on 
virtual channels, consult the MAX online help file.

To use the virtual channels, enter the name of the virtual channel into the 
analog input channel string. If using multiple virtual channels, separate 
them using a comma or enter them in a different index in the channel string 
array. The application does all scaling, linearization, autozeroing, and CJC 
automatically.

Virtual analog input channels can be randomly scanned; therefore, virtual channels 

can be entered in any order or repeated in the channel string.

To perform a multiplexed scan in your application, perform the following 
steps:

1.

Open an analog input example in your ADE.

2.

Enter the appropriate SCXI channel string or virtual channel string into 
the channels parameter.

3.

Either enter the input limits for signals connected to the module to 
adjust the gain settings in your system, or use the default gain settings 
from the configuration utility, and then run the application. When 
using virtual channels, the default input limits configured in the virtual 
channel configurator are used.

You have completed a multiplexed scan using your SCXI-1125.

This is not a comprehensive discussion of SCXI scanning using LabVIEW 
or Measurement Studio, but it should give you enough information to help 
you get started with the examples that are shipped with these software 
packages.