National Instruments NI PXI-5422 Benutzerhandbuch
© National Instruments Corporation
55
NI PXI-5422 Calibration Procedure
c.
Call
niFgen_InitiateGeneration
(niFgen Initiate
Generation VI) to initiate the waveform generation using
the following parameter:
the following parameter:
•
vi: The session handle returned from
niFgen_InitExtCal
d.
Measure the frequency of the generated waveform. This value is
the
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
Adjusting the Calibration ADC
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.
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:
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:
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:
following parameters:
•
vi: The session handle returned from
niFgen_InitExtCal
•
channelName:
"0"
•
attributeID:
NIFGEN_ATTR_GAIN_DAC_VALUE
•
value:
1700