National Instruments AT-MIO-16X - Manual (Page 213)

© National Instruments Corporation 6-1 AT-MIO-16X User Manual
Chapter
6
Calibration Procedures
This chapter discusses the calibration resources and procedures for the
AT-MIO-16X analog input and analog output circuitry.
The calibration process involves reading offset and gain errors from
the analog input and analog output sections and writing values to the
appropriate calibration DACs to null out the errors. There are five
calibration DACs associated with the analog input section, and four
calibration DACs with the analog output section; two for each output
channel. After the calibration process is complete, each calibration
DAC is at a known value. Because these values are lost when the board
is powered down, they are also stored in the onboard EEPROM for
future referencing. Figure 6-1 shows where information is stored in the
EEPROM.