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© National Instruments Corporation 41 NI PXI-5422 Calibration Procedure
8. Call niFgen_CalAdjustMainPathPreAmpOffset (niFgen Cal
Adjust Main Path Pre Amp Offset VI) using the following parameters:
• vi: The session handle returned from
niFgen_InitExtCal
• channelName: "0"
• configuration: The Current Configuration value for the current
iteration from Table 7.
• gainDACValues: An array containing two elements—the two
values (
2000, 1000) that you set as the gain DAC in the order that
you measured them.
• offsetDACValues: An array containing two elements—the two
values (
50000, 15000) that you set as the offset DAC in the order
that you measured them.
• measuredOutputs: An array containing three elements—the
three output voltages (
measurement 0, measurement 1,
measurement 2) that you measured in the order that you
measured them.
Adjusting the Main Path Pre-Amplifier Gain
1. Call niFgen_SetAttributeViInt32 to set the analog path value
(niFgen property node: Output Attributes»Analog Path) using the
following parameters:
• vi: The session handle returned from
niFgen_InitExtCal
• channelName: "0"
• attributeID: NIFGEN_ATTR_ANALOG_PATH
• value: NIFGEN_VAL_FIXED_LOW_GAIN_ANALOG_PATH
2. Call niFgen_SetAttributeViReal64 to set the post-amplifier
attenuation (niFgen property node: Calibration»Post-Amplifier
Attenuation) using the following parameters:
• vi: The session handle returned from
niFgen_InitExtCal
• channelName: "0"
• attributeID: NIFGEN_ATTR_POST_AMPLIFIER_ATTENUATION
• value: 0