Advantech PCI-1723 Dokumentacja Pobierz pdf (Strona 54)

D.1 VR Assignment

There is two variable resistors (VR1 and VR2) on the PCI-1723 to

adjust the accurate reference voltage. We have provided two test points

(See J4 and J7 in Figure D-1) for you to check the reference voltage on

board. Before you start to calibrate the D/A channels, please adjust

VR1 until the reference voltage on J4 has between +9.9995 ~ +10.0005

V. And adjust VR2 until the reference voltage on J7 has between

-9.9995 ~ -10.0005 V. Figure D-1 shows the locations of VR1, VR2, J4

and J7.

Figure D-1: PCI-1723 VR assignment

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Advantech PCI-1723 Dokumentacja Strona 54