National Instruments NI PXI-5422 Benutzerhandbuch

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c.

Call 

niFgen_InitiateGeneration

 (niFgen Initiate 

Generation VI) to initiate the waveform generation using 
the following parameter:

•

vi: The session handle returned from 

niFgen_InitExtCal

d.

Measure the frequency of the generated waveform. This value is 
the 

measured frequency

.

14. Call 

niFgen_AbortGeneration

 (niFgen Abort Generation VI) to 

abort the waveform generation using the following parameter:

•

vi: The session handle returned from 

niFgen_InitExtCal

 

The NI PXI-5422 has an onboard calibration ADC that is used during 
self-calibration. Adjusting the calibration ADC involves characterizing the 
gain and offset associated with this ADC so that performing self-calibration 
results in an accurately calibrated device.

1.

Call 

niFgen_InitializeCalADCCalibration

 (niFgen Initialize 

Cal ADC Calibration VI) using the following parameter:

•

vi: The session handle returned from 

niFgen_InitExtCal

2.

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

3.

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

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: 

1700