National Instruments NI PXI-5422 Adjusting the Main Path Pre-Amplifier Gain

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