User guide

Operation Theory• 33
4
Operation Theory
The operation theory of the functions on PCI-9112 card is described in this
chapter. The functions include the A/D conversion, D/A conversion, Digital
I/O and counter / timer. The operation theory can help you to understand how
to configure or to program the PCI-9112.
4.1 A/D Conversion
Before programming the PCI-9112 to perform any A/D conversions, you
should understand the following issues:
• A/D front-end signal input connection
• A/D conversion procedure
• A/D trigger mode
• A/D data transfer mode
• Signal Connection