AXIOMTEK DASP-52282, Руководство пользователя

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DASP-52282 Card User’s Manual
Calibration
48
5.2 D/A Calibration
Calibration procedure is easily performed by using the calibration
program. Step-by-step walkthrough of D/A calibration is listed as
follows:
Select DAC1 (JP8) and DAC2 (JP9) to ± 10V
output range
Set DAC1 and DAC2 output data to -10V and
adjust VR5, VR8 until DAC1 and DAC2 output
voltage to -10V with 1 LSB tolerance (
± 2.44mV)
Set DAC1 and DAC2 output voltage to +10V and
adjust VR9, VR10 until DAC1, DAC2 output
voltage to +10V with 1 LSB tolerance
Select DAC1 (JP8) and DAC2 (JP9) to 0~10V
output range
Set DAC1 and DAC2 output voltage to 0V, adjust
VR6 and VR7 until DAC1 and DAC2 output
voltage to 0V with 1 LSB tolerance, respectively
Set DAC1 and DAC2 output voltage to 10V,
adjust VR9 and VR10 until DAC1 and DAC2
output voltage to 10V with 1 LSB tolerance,
respectively
5.3 A/D Calibration Steps
Calibration procedure is easily performed by using the calibration
program. Step-by-step walkthrough of A/D calibration is listed as
follows:
Connect A/D input channel 0 to ground (0V)
Select bipolar input configuration, adjust VR3
until ADC reading value to zero with 0.5 LSB
tolerances (
± 1.22mV)
Select unipolar input configuration, adjust VR4
until ADC reading value to zero with 0.5 LSB
tolerances (
± 1.22mV)
Connect A/D input channel 0 to a DC voltage
5V (or directly connect to D/A output
+5V)
Adjust VR2 until ADC reading data to +5V with 1
LSB tolerance (
± 2.44mV)