National Instruments NI PXI-5422 Manual do Utilizador descarregar pdf (Página 47)

8. Take the following voltage measurements at the NI PXI-5422 CH 0

front panel connector into a high-impedance load:

a. Call

niFgen_SetAttributeViInt32 to set the offset DAC

value (niFgen property node: Calibration»Offset DAC Value)

using the following parameters:

• vi: The session handle returned from

niFgen_InitExtCal

• channelName: "0"

• attributeID: NIFGEN_ATTR_OFFSET_DAC_VALUE

• value: 50000

b. Call niFgen_Commit (niFgen Commit VI) to commit the

attribute values to the device using the following parameter:

• vi: The session handle returned from

niFgen_InitExtCal

c. Wait 500 ms for the output to settle.

d. Use the DMM to measure the voltage output by the device.

This measurement is

measurement 0, which is used in step 9.

e. Call

niFgen_SetAttributeViInt32 to set the offset DAC

value (niFgen property node: Calibration»Offset DAC Value)

using the following parameters:

• vi: The session handle returned from

niFgen_InitExtCal

• channelName: "0"

• attributeID: NIFGEN_ATTR_OFFSET_DAC_VALUE

• value: 15000

f. Call niFgen_Commit (niFgen Commit VI) to commit the

attribute values to the device using the following parameter:

• vi: The session handle returned from

niFgen_InitExtCal

g. Wait 500 ms for the output to settle.

h. Use the DMM to measure the voltage output by the device.

This measurement is

measurement 1, which is used in step 9.

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National Instruments NI PXI-5422 Manual do Utilizador Página 47