National Instruments NI PXI-5422 Manual de usuario Pagina 1

CALIBRATION PROCEDURENI PXI-5422This document contains step-by-step instructions for writing a calibration procedure for the NI PXI-5422 arbitrary wav

NI PXI-5422 Calibration Procedure 10 ni.comOptional CalibrationYou can choose to skip the adjustment steps of the calibration procedure if the output

© National Instruments Corporation 11 NI PXI-5422 Calibration ProcedureFigure 2. Optional Calibration Programming FlowSelf-CalibrateVerifyDocument Pr

NI PXI-5422 Calibration Procedure 12 ni.comExternal Calibration RequirementsThis section describes the test equipment and test conditions required for

© National Instruments Corporation 13 NI PXI-5422 Calibration ProcedureExternal Calibration Procedures The complete external calibration procedure con

NI PXI-5422 Calibration Procedure 14 ni.comVerifying NI PXI-5422 SpecificationsNote Always self-calibrate the NI PXI-5422 before beginning a verifica

© National Instruments Corporation 15 NI PXI-5422 Calibration ProcedureFigure 3. NI PXI-5422 Front Panel ConnectorsPFI 0PFI 1NI PXI-542216-Bit 200 MS

NI PXI-5422 Calibration Procedure 16 ni.comVerifying the Oscillator Frequency AccuracyThis test verifies the frequency accuracy of the oscillator on t

© National Instruments Corporation 17 NI PXI-5422 Calibration Procedure5. Call niFgen_SetAttributeViReal64 to set the offset (niFgen property node: Ar

NI PXI-5422 Calibration Procedure 18 ni.comA frequency error of 45 Hz for a 10 MHz signal corresponds to an error of 4.5 ppm. This limit accounts for

© National Instruments Corporation 19 NI PXI-5422 Calibration Procedure• IDQuery: VI_TRUE• resetDevice: VI_TRUE• vi: A pointer to a ViSession. The var

NI PXI-5422 Calibration Procedure 2 ni.comAdjusting the Analog Output ...35Adjusting the Oscillator F

NI PXI-5422 Calibration Procedure 20 ni.com7. Call niFgen_SetAttributeViBoolean to enable the analog output (niFgen property node: Basic Operation»Out

© National Instruments Corporation 21 NI PXI-5422 Calibration Procedure12. Call niFgen_SetAttributeViReal64 to set the offset (niFgen property node: A

NI PXI-5422 Calibration Procedure 22 ni.comTable 4. Values for Verifying the Gain of the Main Analog Path Iteration GainIdeal Positive Full-Scale(Vol

© National Instruments Corporation 23 NI PXI-5422 Calibration Procedure21 0.018500 0.018500 – 0.018500 ±0.000530 ±0.00057422 0.013000 0.013000 – 0.0

NI PXI-5422 Calibration Procedure 24 ni.com14. Call niFgen_SetAttributeViReal64 to set the gain (niFgen property node: Arbitrary Waveform Output»Arbit

© National Instruments Corporation 25 NI PXI-5422 Calibration Procedure23. Subtract the Ideal Negative Full-Scale value from the Measured Negative Ful

NI PXI-5422 Calibration Procedure 26 ni.comTable 5. Values for Verifying the Offset of the Main Analog Path Iteration GainIdeal Positive Offset (Volt

© National Instruments Corporation 27 NI PXI-5422 Calibration Procedure21 0.018500 0.009250 – 0.009250 ±0.000532 ±0.00057922 0.013000 0.006500 – 0.0

NI PXI-5422 Calibration Procedure 28 ni.com5. Call niFgen_SetAttributeViReal64 to set the offset (niFgen property node: Arbitrary Waveform Output»Arbi

© National Instruments Corporation 29 NI PXI-5422 Calibration Procedure13. Measure the negative DC voltage out of the NI PXI-5422. Record negative DC

© National Instruments Corporation 3 NI PXI-5422 Calibration ProcedureWhat Is Calibration?Calibration consists of verifying the output accuracy of a d

NI PXI-5422 Calibration Procedure 30 ni.comTable 6. Values for Verifying the Gain of the Direct Analog Path Iteration GainIdeal Positive Full-Scale(V

© National Instruments Corporation 31 NI PXI-5422 Calibration Procedure4. Call niFgen_SetAttributeViReal64 to set the gain (niFgen property node: Arbi

NI PXI-5422 Calibration Procedure 32 ni.com11. Measure the negative DC voltage out of the NI PXI-5422. Record the negative DC voltage out measurement

© National Instruments Corporation 33 NI PXI-5422 Calibration Procedure1. Call niFgen_InitExtCal (niFgen Init Ext Cal VI) to open an NI-FGEN external

NI PXI-5422 Calibration Procedure 34 ni.comFigure 4. NI PXI-5422 External Calibration ProcedureInitialize Ext Cal SessionInitialize Analog Output Cal

© National Instruments Corporation 35 NI PXI-5422 Calibration ProcedureInitializing the External Calibration SessionCall niFgen_InitExtCal (niFgen Ini

NI PXI-5422 Calibration Procedure 36 ni.com3. Call niFgen_SetAttributeViInt32 to set the analog path value (niFgen property node: Output Attributes»An

© National Instruments Corporation 37 NI PXI-5422 Calibration Procedure8. Call niFgen_SetAttributeViReal64 to set the post-amplifier attenuation (niFg

NI PXI-5422 Calibration Procedure 38 ni.com2. Call niFgen_SetAttributeViReal64 to set the post-amplifier attenuation (niFgen property node: Calibratio

© National Instruments Corporation 39 NI PXI-5422 Calibration Procedure5. Call niFgen_SetAttributeViBoolean to set the analog filter state (niFgen pro

NI PXI-5422 Calibration Procedure 4 ni.comThe output accuracy requirements of your application determine how often you should externally calibrate the

NI PXI-5422 Calibration Procedure 40 ni.comf. Call niFgen_SetAttributeViInt32 to set the gain DAC value (niFgen property node: Calibration»Gain DAC Va

© National Instruments Corporation 41 NI PXI-5422 Calibration Procedure8. Call niFgen_CalAdjustMainPathPreAmpOffset (niFgen Cal Adjust Main Path Pre A

NI PXI-5422 Calibration Procedure 42 ni.com3. Call niFgen_SetAttributeViInt32 to set the offset DAC value (niFgen property node: Calibration»Offset DA

© National Instruments Corporation 43 NI PXI-5422 Calibration Procedure6. Call niFgen_SetAttributeViReal64 to set the pre-amplifier attenuation (niFge

NI PXI-5422 Calibration Procedure 44 ni.comg. Call niFgen_WriteBinary16AnalogStaticValue (niFgen Write Binary 16 Analog Static Value VI) to set the ma

© National Instruments Corporation 45 NI PXI-5422 Calibration ProcedureAdjusting the Main Path Post-Amplifier Gain and Offset1. Call niFgen_WriteBinar

NI PXI-5422 Calibration Procedure 46 ni.com6. Call niFgen_SetAttributeViInt32 to set the analog path value (niFgen property node: Output Attributes»An

© National Instruments Corporation 47 NI PXI-5422 Calibration Procedure8. Take the following voltage measurements at the NI PXI-5422 CH 0 front panel

NI PXI-5422 Calibration Procedure 48 ni.com9. Call niFgen_CalAdjustMainPathPostAmpGainAndOffset (niFgen Cal Adjust Main Path Post Amp Gain And Offset

© National Instruments Corporation 49 NI PXI-5422 Calibration Procedure4. Call niFgen_SetAttributeViBoolean to set the analog filter state (niFgen pro

© National Instruments Corporation 5 NI PXI-5422 Calibration Procedurecalling a 32-bit DLL. Many of the functions use constants defined in the niFgen.

NI PXI-5422 Calibration Procedure 50 ni.com9. Call niFgen_SetAttributeViInt32 to set the analog path value (niFgen property node: Output Attributes»An

© National Instruments Corporation 51 NI PXI-5422 Calibration Procedureg. Call niFgen_Commit (niFgen Commit VI) to commit the attribute values to the

NI PXI-5422 Calibration Procedure 52 ni.com12. Call niFgen_CalAdjustDirectPathGain (niFgen Cal Adjust Direct Path Gain VI) using the following paramet

© National Instruments Corporation 53 NI PXI-5422 Calibration Procedure4. Call niFgen_SetAttributeViReal64 to set the offset (niFgen property node: Ar

NI PXI-5422 Calibration Procedure 54 ni.com9. Call niFgen_CreateArbWaveform (niFgen Create Arbitrary Waveform VI) using the following parameters:• vi:

© National Instruments Corporation 55 NI PXI-5422 Calibration Procedurec. Call niFgen_InitiateGeneration (niFgen Initiate Generation VI) to initiate t

NI PXI-5422 Calibration Procedure 56 ni.com5. Call niFgen_SetAttributeViInt32 to set the offset DAC value (niFgen property node: Calibration»Offset DA

© National Instruments Corporation 57 NI PXI-5422 Calibration Procedure• vi: The session handle returned from niFgen_InitExtCal• channelName: "0&

NI PXI-5422 Calibration Procedure 58 ni.com• returnCalibratedValue: VI_FALSE• calADCValue: A ViReal64 variable. The variable passed by reference throu

© National Instruments Corporation 59 NI PXI-5422 Calibration Procedure27. Call niFgen_ReadCalADC (niFgen Read CAL ADC VI) to measure the analog outpu

NI PXI-5422 Calibration Procedure 6 ni.comDocumentationFor information about NI-FGEN and the NI PXI-5422, you may find the following documents helpful

NI PXI-5422 Calibration Procedure 60 ni.com33. Call niFgen_SetAttributeViBoolean to disable the analog output (niFgen property node: Basic Operation»O

© National Instruments Corporation 61 NI PXI-5422 Calibration ProcedureCalibration UtilitiesNI-FGEN supports several calibration utilities that allow

NI PXI-5422 Calibration Procedure 62 ni.comNI-FGENNI-FGEN provides a full complement of calibration utility functions and VIs. Refer to the NI Signal

National Instruments, NI, ni.com, and LabVIEW are trademarks of National Instruments Corporation. Refer to the Terms of Use section on ni.com/legal f

© National Instruments Corporation 7 NI PXI-5422 Calibration Procedure3. Select the device that you want to calibrate.4. Initiate self-calibration in

NI PXI-5422 Calibration Procedure 8 ni.comExternal Calibration OptionsExternal calibration involves both verification and adjustment. Verification is

© National Instruments Corporation 9 NI PXI-5422 Calibration ProcedureFigure 1. Complete Calibration Programming FlowAdjust(Cal Dates and Temperature