| Data Acquisition Toolbox | Search Help Desk |
Configuring Hardware Input Channels
You can physically configure your hardware input channels with theInputType property. The hardware-specific values for this property are shown below.| Vendor/Device |
Value |
| Sound Cards |
AC-Coupled
|
| National Instruments |
{SingleEnded}|Differential|
|
InputType value is AC-Coupled. For National Instruments boards, the input channels can be configured as single-ended or differential. The E-series boards have 16 or 64 single-ended inputs and 8 or 32 differential inputs which are interleaved in banks of 8. This means that for a 64 channel board with single-ended inputs, you can add all 64 channels. However, if the inputs are configured as differential, you can only add channels 0-7, 16-23, 32-39, and 48-55. You should use the differential mode whenever possible since this mode helps to reduce signal noise. Consult your hardware manual for details on how to connect your signal source to your data acquisition hardware.
Note:
InputType value is changed, and that change decreases the number of channels contained by the analog input object, then a warning is displayed and all channels are deleted.