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Calibrating the Board
You should calibrate the board using the InstaCal utility software after the board has fully warmed up. The
recommended warm-up time is 15 minutes. For best results, calibrate the board immediately before use.
The high resolution analog components on the board are temperature-sensitive, so calibrating the board
before use ensures that your board is operating with the optimum calibration values. All calibration values
are saved in nvRAM.
Calibration theory
InstaCal calibrates the board's analog outputs for offset and gain (see
adjust the gain of the DAC. A separate DAC is used to adjust offset on the final output amplifier.
Trim DAC
Calibration schedule
You should calibrate your PCI-DAC6700 Series board once per year using InstaCal's calibration
procedures.
D/A
Ref
Gain
Adjust
Trim DAC
Figure 4-1. Analog Output Calibration
4-1
Figure 4-1
). A trim DAC is used to
Analog Out
Offset
Adjust
Chapter 4
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