National Instruments NI PXI-5422 Bedienungsanleitung Seite 38
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NI PXI-5422 Calibration Procedure 38 ni.com
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
3. 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
4. Repeat steps 5 through 8 for each of the 10 iterations listed in Table 7,
changing the Analog Filter Enable, Pre-Amplifier Attenuation, and
Current Configuration values for each iteration.
Table 7. Attributes and Values for Main Path Pre-Amplifier Offset
Iteration
Analog Filter
Enable
Pre-Amplifier
Attenuation
Current Configuration
1 VI_FALSE 0 NIFGEN_VAL_CAL_CONFIG_MAIN_PATH_FILTER_OFF_0DB
2 VI_FALSE 3 NIFGEN_VAL_CAL_CONFIG_MAIN_PATH_FILTER_OFF_3DB
3 VI_FALSE 6 NIFGEN_VAL_CAL_CONFIG_MAIN_PATH_FILTER_OFF_6DB
4 VI_FALSE 9 NIFGEN_VAL_CAL_CONFIG_MAIN_PATH_FILTER_OFF_9DB
5 VI_FALSE 12 NIFGEN_VAL_CAL_CONFIG_MAIN_PATH_FILTER_OFF_12DB
6 VI_TRUE 0 NIFGEN_VAL_CAL_CONFIG_MAIN_PATH_FILTER_ON_0DB
7 VI_TRUE 3 NIFGEN_VAL_CAL_CONFIG_MAIN_PATH_FILTER_ON_3DB
8 VI_TRUE 6 NIFGEN_VAL_CAL_CONFIG_MAIN_PATH_FILTER_ON_6DB
9 VI_TRUE 9 NIFGEN_VAL_CAL_CONFIG_MAIN_PATH_FILTER_ON_9DB
10 VI_TRUE 12 NIFGEN_VAL_CAL_CONFIG_MAIN_PATH_FILTER_ON_12DB
- NI PXI-5422 1
- Conventions 2
- Introduction 2
- What Is Calibration? 3
- Self-Calibration 3
- External Calibration 3
- Why Should You Calibrate? 3
- Software 4
- Self-Calibration Procedures 6
- FGEN Soft Front Panel 7
- External Calibration Options 8
- Optional Calibration 10
- Test Equipment 12
- Test Conditions 12
- Calibration Procedures in C 13
- • Direct path gain 18
- NIFGEN_ATTR_ARB_OFFSET 21
- "0" 21
- Adjusting the NI PXI-5422 32
- Adjust Main Path Pre-Amp Gain 34
- Adjust Direct Path Gain 34
- Adjusting the Analog Output 35
- C value 36
- Iteration 38
- (niFgen Cal 41
- AC in the order 41
- Adjusting the Calibration ADC 55
- Calibration Utilities 61
- Where to Go for Support 63
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