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© National Instruments Corporation 45 NI PXI-5422 Calibration Procedure
Adjusting the Main Path Post-Amplifier Gain and Offset
1. Call niFgen_WriteBinary16AnalogStaticValue (niFgen Write
Binary 16 Analog Static Value VI) to set the main DAC value using
the following parameters:
• vi: The session handle returned from
niFgen_InitExtCal
• channelName:
"0"
• value: 0
2. Call niFgen_SetAttributeViBoolean to set the analog filter state
(niFgen property node: Output Attributes»Analog Filter Enabled)
using the following parameters:
• vi: The session handle returned from
niFgen_InitExtCal
• channelName: "0"
• attributeID: NIFGEN_ATTR_ANALOG_FILTER_ENABLED
• value: VI_FALSE
3. Call niFgen_SetAttributeViReal64 to set the pre-amplifier
attenuation (niFgen property node: Calibration»Pre-Amplifier
Attenuation) using the following parameters:
• vi: The session handle returned from
niFgen_InitExtCal
• channelName: "0"
• attributeID: NIFGEN_ATTR_PRE_AMPLIFIER_ATTENUATION
• value: 0
4. Call niFgen_SetAttributeViInt32 to set the gain DAC value
(niFgen property node: Calibration»Gain DAC Value) using the
following parameters:
• vi: The session handle returned from
niFgen_InitExtCal
• channelName: "0"
• attributeID: NIFGEN_ATTR_GAIN_DAC_VALUE
• value: 2000
5. Repeat steps 6 through 9 for each of the eight iterations listed in
Table 9, changing the Analog Path, Post-Amplifier Attenuation, and
Current Configuration values for each iteration.