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Manual National Instruments NI PXI-5422

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  • National Instruments NI PXI-5422 - page 1

    CALIBRATION PROCEDURE NI PXI-5422 This document contains step-by-step in structions for writing a calibration procedure for the NI PXI-5422 arbitrary wa veform generator . Contents Conventions .............. .............. .............. .......................... .............. .......... 1 Introduction ............ .............. .............. . ...

  • National Instruments NI PXI-5422 - page 2

    NI PXI-5422 Calibration Pr ocedure 2 ni.com Adjusting the Analog Output ................... .............. ................. ..35 Adjusting the Oscillator Frequency................... ................. .......52 Adjusting the Calibration ADC ................ .............. .............. .....55 Closing the External Adjustment Session ............. ...

  • National Instruments NI PXI-5422 - page 3

    © National Instruments Corporation 3 NI PXI-5422 Calibration Procedure What Is Calibration? Calibration consists of verifying the output accuracy of a device and correcting for any output error. Veri fication is measuring the performance of a device and comp aring the resul ts to the sp ecifications of the device. NI calibrates every NI PXI-5422 a ...

  • National Instruments NI PXI-5422 - page 4

    NI PXI-5422 Calibration Pr ocedure 4 ni.com The output accuracy requirements of your application determine ho w often you should externally calibrate the NI PXI-5422. NI recomm ends that you perform a complete external calibra tion at least once ev ery two years. Y ou can shorten this interv al base d on the accuracy demands of your application. Re ...

  • National Instruments NI PXI-5422 - page 5

    © National Instruments Corporation 5 NI PXI-5422 Calibration Procedure calling a 32-bit DLL. Many of the functions use constants def ined in the niFgen.h f ile. T o use these constants in C, you must include niFgen.h in your code when you write the calibration procedure. Refer to T able 1 for file locations. The calibration process is described in ...

  • National Instruments NI PXI-5422 - page 6

    NI PXI-5422 Calibration Pr ocedure 6 ni.com Documentation For information about NI-FGEN and the NI PXI-5 422, you may find the following docum ents helpful: • NI Signal Generators Getting Started Guide • NI Signal Generators Help • NI PXI-5422 Specifications • NI-FGEN Instrument Driver Quick Reference Guide The NI Signal Generators Getting ...

  • National Instruments NI PXI-5422 - page 7

    © National Instruments Corporation 7 NI PXI-5422 Calibration Procedure 3. Select the device that you want to calibrate. 4. Initiate self-calibration in one of the following ways: •C l i c k Self-Calibrate in the upper right corner . • Right-click the de vice name under Devices and Interf aces, and select Self-Calibrate from the drop-down menu. ...

  • National Instruments NI PXI-5422 - page 8

    NI PXI-5422 Calibration Pr ocedure 8 ni.com External Calibration Options External calibration involves bo th verification and adjustment. Verification is the process of testing the device to ensure that the output accuracy is within certain speci fications. You can use verifi cation to ensure that the adjustment process was successful or to determi ...

  • National Instruments NI PXI-5422 - page 9

    © National Instruments Corporation 9 NI PXI-5422 Calibration Procedure Figure 1. Complete Calibration Programming Flow Adjust (Cal Dates and T emperatures Updated) V erify Document P ost-Adjustment Results Meets Calibration T est Limits? Revie w V erification/ Adjustment Procedure or Return Device V erify Self-Calibrate Calibration/ V erification ...

  • National Instruments NI PXI-5422 - page 10

    NI PXI-5422 Calibration Procedur e 10 ni.com Optional Calibration You can choose to skip the adjustme nt steps of the calibration procedure if the output error is within the calibr ation test limits or the pub lished specifications during the first verificat ion. If all of the output errors determined during the first veri fication fall within the ...

  • National Instruments NI PXI-5422 - page 11

    © National Instruments Corporation 11 NI PXI-5422 Calibration Procedure Figure 2. Option al Calibration Programming Flow Self-Calibrate V erify Document Pre-Adjustment Results Meets Calibration T est Limits? Meets Published Specifications? Update Calibration Dates and T emperatures Without Adjusting Results Within Published Specs (Adjustment Optio ...

  • National Instruments NI PXI-5422 - page 12

    NI PXI-5422 Calibration Procedur e 12 ni.com External Calibration Requirements This section describes the test equipment and test conditions required for calibration. T est Equipment External calibration requ ires different equipmen t for each applicable specification. Refer to Tabl e 2 for a list of equipment. T est Conditions Follow these guideli ...

  • National Instruments NI PXI-5422 - page 13

    © National Instruments Corporation 13 NI PXI-5422 Calibration Procedure External Calibration Procedures The complete external calibration pro cedure consists of self-calibrating, verifying the performance of the NI PXI-542 2, adjusting the calibration constants, and verifying again after the adjustments. In some cases, the complete calibration p r ...

  • National Instruments NI PXI-5422 - page 14

    NI PXI-5422 Calibration Procedur e 14 ni.com V erifying NI PXI-5422 Specifications Note Always self-calibrate the NI PXI-5422 before beginning a verif ication procedure. This section provides instructions for verifyi ng the NI PXI-5422 specifications. This section also incl udes instructions for updating the calibration cycle. V erification determi ...

  • National Instruments NI PXI-5422 - page 15

    © National Instruments Corporation 15 NI PXI-5422 Calibration Procedure Figure 3. NI PXI-5422 Front Panel Connectors PFI 0 PFI 1 NI PXI- 5422 16-Bit 200 MS/s AWG ACCESS ACTIVE CLK IN CH 0 DIGIT AL DA T A & CONTROL ...

  • National Instruments NI PXI-5422 - page 16

    NI PXI-5422 Calibration Procedur e 16 ni.com V erifying the Oscillato r Frequency Accuracy This test verifies the frequency accuracy of the oscillator on the NI PXI-5422. The verification involves generating a 10 MHz sine wave with the NI PXI-5422 and m easuring the sine wave frequency wi th one of the instruments from Tab le 2. T o verify the freq ...

  • National Instruments NI PXI-5422 - page 17

    © National Instruments Corporation 17 NI PXI-5422 Calibration Procedure 5. Call niFgen_SetAttributeViReal64 to set the of fset (niFg en property node: Arbitrary Waveform O utput»Arbitrary Waveform Offset ) using the following parameters: • vi : The session handle ret urned from niFgen_init • channelName : "0" • attributeID : NIFGE ...

  • National Instruments NI PXI-5422 - page 18

    NI PXI-5422 Calibration Procedur e 18 ni.com A frequency error of 45 Hz for a 10 MHz signal corresponds to an error of 4.5 ppm. This limit accoun ts for the initial accuracy and the frequency de vi ation caused by temperature and aging. Refer to T abl e 3 for frequency ranges. 11. Call niFgen_AbortGeneration (niFgen Abort Generation VI) to abort th ...

  • National Instruments NI PXI-5422 - page 19

    © National Instruments Corporation 19 NI PXI-5422 Calibration Procedure • IDQuery : VI_TRUE • resetDevice : VI_TRUE • vi : A pointer to a V iSession. The variable passed by reference through this parameter recei ves the value that identifies the session created by this function . This value acts as the session handle and is passed as the fir ...

  • National Instruments NI PXI-5422 - page 20

    NI PXI-5422 Calibration Procedur e 20 ni.com 7. Call niFgen_SetAttributeViBoolean to enable the analog output (niFgen property node: Basic Operation»Output Enabled ) using the following parameters: • vi : The session handle ret urned from niFgen_init • channelName : "0" • attributeID : NIFGEN_ATTR_O UTPUT_ENABLED • value : VI_TRU ...

  • National Instruments NI PXI-5422 - page 21

    © National Instruments Corporation 21 NI PXI-5422 Calibration Procedure 12. Call niFgen_SetAttributeViReal64 to set the of fset (niFg en property node: Arbitrary Waveform O utput»Arbitrary Waveform Offset ) using the following parameters: • vi : The session handle ret urned from niFgen_init • channelName : "0" • attributeID : NIFG ...

  • National Instruments NI PXI-5422 - page 22

    NI PXI-5422 Calibration Procedur e 22 ni.com Table 4. V alues for Verifying the Gain of the Main An alog Path Iteration Gain Ideal Pos it ive Full-Scale (V olts) Ideal Negative Full-Scale (V olts) Measured Pos it ive Full-Scale (V olts) Measured Negative Full-Scale (V olts) Error Pos it ive Full-Scale (V olts) 1 Error Negat ive Full-Scale (V olts) ...

  • National Instruments NI PXI-5422 - page 23

    © National Instruments Corporation 23 NI PXI-5422 Calibration Procedure 21 0.018500 0.018500 – 0.018500 ±0.000530 ±0.000574 22 0.013000 0.013000 – 0.013000 ±0.000521 ±0.000552 23 0.009000 0.009000 – 0.009000 ±0.000514 ±0.000536 24 0.006500 0.006500 – 0.006500 ±0.000510 ±0.000526 1 Error Positive Full-Scale Value = ( Measured Positi ...

  • National Instruments NI PXI-5422 - page 24

    NI PXI-5422 Calibration Procedur e 24 ni.com 14. Call niFgen_SetAttributeViReal64 to set the gain (niFgen property node: Arbitrary Wavefo rm Output»Arbitrary Waveform Gain ) using the following parameters: • vi : The session handle ret urned from niFgen_init • channelName : "0" • attributeID : NIFGEN_ATTR_A RB_GAIN • value : The ...

  • National Instruments NI PXI-5422 - page 25

    © National Instruments Corporation 25 NI PXI-5422 Calibration Procedure 23. Subtract the Ideal Negative Full-Scale value from the Measured Negative Full-Scale value and record the result under Error Negative Full-Scale . The Error Negative Full-Scal e v alue should be less than or equal to th e limit you ar e using. 24. Call niFgen_AbortGeneration ...

  • National Instruments NI PXI-5422 - page 26

    NI PXI-5422 Calibration Procedur e 26 ni.com Table 5. V alues for Verifying the Offse t of the Main Analog Path Iteration Gain Ideal Pos it ive Offset (V olts) Ideal Negative Offset (V olts) Measured Pos it ive Offset (V olts) Measured Negative Offset (V olts) Error Pos it ive Offset (V olts) 1 Error Negative Offset (V olts) 2 Calibration Te s t L ...

  • National Instruments NI PXI-5422 - page 27

    © National Instruments Corporation 27 NI PXI-5422 Calibration Procedure 21 0.018500 0.009250 – 0.009250 ±0.000532 ±0.0 00579 22 0.013000 0.006500 – 0.006500 ±0.000523 ±0.0 00555 23 0.009000 0.004500 – 0.004500 ±0.000516 ±0.0 00538 24 0.006500 0.003250 – 0.003250 ±0.000511 ±0.0 00528 1 Error Positive Offset Value = ( Measured Positi ...

  • National Instruments NI PXI-5422 - page 28

    NI PXI-5422 Calibration Procedur e 28 ni.com 5. Call niFgen_SetAttributeViReal64 to set the of fset (niFgen property node: Arbitrary Waveform O utput»Arbitrary Waveform Offset ) using the following parameters: • vi : The session handle ret urned from niFgen_init • channelName : "0" • attributeID : NIFGEN_ATTR_A RB_OFFSET • value ...

  • National Instruments NI PXI-5422 - page 29

    © National Instruments Corporation 29 NI PXI-5422 Calibration Procedure 13. Measure the negati ve DC voltage out of the NI PXI-5422. Record negati ve DC vo ltage out measurement in the Measured Negative Offset column of T abl e 5. 14. Subtract the Ideal Negative Offset from the Measured Negative Offset and record the result under Error Negative Of ...

  • National Instruments NI PXI-5422 - page 30

    NI PXI-5422 Calibration Procedur e 30 ni.com Table 6. Values for Verifying the Gain of the Direct An alog Path Iteration Gain Ideal Pos it ive Full-Scale (V olts) Ideal Negative Full-Scale (V olts) Measur ed Pos it ive Full-Scale (V olts) Measured Negat ive Full-Scale (V olts) Offset (V olts) 1 Offset Limit (V olts) Error Pos it ive Full-Scale (V o ...

  • National Instruments NI PXI-5422 - page 31

    © National Instruments Corporation 31 NI PXI-5422 Calibration Procedure 4. Call niFgen_SetAttributeViReal64 to set the gain (niFgen property node: Arbitrary Wavef orm Output»Arbitrary Waveform Gain ) using the following parameters: • vi : The session handle ret urned from niFgen_init • channelName : "0" • attributeID : NIFGEN_ATTR ...

  • National Instruments NI PXI-5422 - page 32

    NI PXI-5422 Calibration Procedur e 32 ni.com 11. Measure the negati ve DC v oltage ou t of the NI PXI-5422. R ecord the negati ve DC voltage out measurement in the Measured Negative Full-Scale Value colu mn of T able 6. 12. Call niFgen_AbortGeneration (niFgen Abort Generation VI) to abort the wa veform generation using the following parameter: • ...

  • National Instruments NI PXI-5422 - page 33

    © National Instruments Corporation 33 NI PXI-5422 Calibration Procedure 1. Call niFgen_InitExtCal (niFgen Init Ext Cal VI) to open an NI-FGEN external calibration session using the following parameters: • resourceName : The name of the device you want to calibrate. This name can be found under Devices and Interfaces in MAX. • password : The pa ...

  • National Instruments NI PXI-5422 - page 34

    NI PXI-5422 Calibration Procedur e 34 ni.com Figure 4. NI PXI-5422 External Calibration Procedure Initialize Ext Cal Session Initialize Analog Output Calibration Adjust Main P ath Pre-Amp Offset Adjust Main P ath Pre-Amp Gain Adjust Main P ath Post-Amp Gain and Offset Adjust Direct P ath Gain Adjust Oscillator F requency Adjust Calibration ADC Clos ...

  • National Instruments NI PXI-5422 - page 35

    © National Instruments Corporation 35 NI PXI-5422 Calibration Procedure Initializing the External Calibration Session Call niFge n_InitExtCal (niFgen Ini t Ext Cal VI) to open an NI-F GEN external calibration session using the following parameters: • resourceName : The name of the device you want to calibrate. This name can be found under Device ...

  • National Instruments NI PXI-5422 - page 36

    NI PXI-5422 Calibration Procedur e 36 ni.com 3. Call niFgen_SetAttributeViInt32 to set the analog path v alu e (niFgen property node: Output Attributes»Ana log Path ) usin g the following parameters: • vi : The session handle ret urned from niFgen_InitExtCal • channelName : "0" • attributeID : NIFGEN_ATTR_A NALOG_PATH • value : N ...

  • National Instruments NI PXI-5422 - page 37

    © National Instruments Corporation 37 NI PXI-5422 Calibration Procedure 8. Call niFgen_SetAttributeViReal64 to set the post-amplifier attenuation (niFgen pro perty node: Calibra tion»Post -Amplifier Attenuation ) using the following parameters: • vi : The session handle ret urned from niFgen_InitExtCal • channelName : "0" • attrib ...

  • National Instruments NI PXI-5422 - page 38

    NI PXI-5422 Calibration Procedur e 38 ni.com 2. Call niFgen_SetAttributeViReal64 to set the post-amplifier attenuation (niFgen pro perty node: Cali bration»Po st-Ampli fier Attenuation ) using th e following parameters: • vi : The session handle ret urned from niFgen_InitExtCal • channelName : "0" • attributeID : NIFGEN_ATTR_P OST_ ...

  • National Instruments NI PXI-5422 - page 39

    © National Instruments Corporation 39 NI PXI-5422 Calibration Procedure 5. Call niFgen_SetAttributeViBoolean to set the analog filter state (niFgen property node: Outpu t Attributes»Analog Fi lter Enabled ) using the following parameters: • vi : The session handle ret urned from niFgen_InitExtCal • channelName : "0" • attributeID ...

  • National Instruments NI PXI-5422 - page 40

    NI PXI-5422 Calibration Procedur e 40 ni.com f. Call niFgen_SetAttributeViInt32 to set the gain D A C v alue (niFgen property nod e: Calibration»Gain DAC Value ) using t he following parameters: • vi : The session handle ret urned from niFgen_InitExtCal • channelName : "0" • attributeID : NIFGEN_ATTR_GA IN_DAC_VALUE • value : 100 ...

  • National Instruments NI PXI-5422 - page 41

    © National Instruments Corporation 41 NI PXI-5422 Calibration Procedure 8. Call niFgen_CalAdjustMainPathPreAmpOffset (niF gen Cal Adjust Main P ath Pre Amp Off set VI) using the follo wing parameters: • vi : The session handle ret urned from niFgen_InitExtCal • channelName : "0" • configuration : The Current Configuration va lue fo ...

  • National Instruments NI PXI-5422 - page 42

    NI PXI-5422 Calibration Procedur e 42 ni.com 3. Call niFgen_SetAttributeViInt32 to set the of fset DA C value (niFgen property node: Calibra tion»Offset DAC Valu e ) using the following parameters: • vi : The session handle ret urned from niFgen_InitExtCal • channelName : "0" • attributeID : NIFGEN_ATTR_O FFSET_DAC_VALUE • value ...

  • National Instruments NI PXI-5422 - page 43

    © National Instruments Corporation 43 NI PXI-5422 Calibration Procedure 6. Call niFgen_SetAttributeViReal64 to set the pre-amplifier attenuation (niFgen pro perty node: Calibratio n»Pre-Amplifi er Attenuation ) using the following parameters: • vi : The session handle ret urned from niFgen_InitExtCal • channelName : "0" • attribut ...

  • National Instruments NI PXI-5422 - page 44

    NI PXI-5422 Calibration Procedur e 44 ni.com g. Call niFgen_WriteBinary16AnalogStaticValue (niFgen Write Binary 16 Analog Static V alue VI) to set the main D A C value using the follo wing parameters: • vi : The session handle returned from niFgen_InitExtCal • channelName : "0" • value : – 29232 h. Call niFgen_Commit (niFgen Commi ...

  • National Instruments NI PXI-5422 - page 45

    © National Instruments Corporation 45 NI PXI-5422 Calibration Procedure Adjusting the Main Path Post-Amplifier Gain and Offset 1. Call niFg en_WriteBinary16AnalogStaticValue (niFgen Write Binary 16 An alog Static V alue V I) to set th e main DA C value using the following parameters: • vi : The session handle ret urned from niFgen_InitExtCal • ...

  • National Instruments NI PXI-5422 - page 46

    NI PXI-5422 Calibration Procedur e 46 ni.com 6. Call niFgen_SetAttributeViInt32 to set the analog path v alu e (niFgen property node: Output Attributes»Ana log Path ) usin g the following parameters: • vi : The session handle ret urned from niFgen_InitExtCal • channelName : "0" • attributeID : NIFGEN_ATTR_A NALOG_PATH • value : T ...

  • National Instruments NI PXI-5422 - page 47

    © National Instruments Corporation 47 NI PXI-5422 Calibration Procedure 8. T ake the follo wing voltage measur ements at the NI PXI-5422 CH 0 front panel connector i nto a high-impedance load: a. Call niFgen_SetAttributeViInt32 to set the of fset D AC value (niFgen property node: Calibration»Offset DAC Value ) using the following parameters: • ...

  • National Instruments NI PXI-5422 - page 48

    NI PXI-5422 Calibration Procedur e 48 ni.com 9. Call niFgen_CalAdjustMainPathPostAmpGainAndO ffset (niFgen Cal Adjust Main Path Post Amp Gain And Offset VI) using the following parameters: • vi : The session handle ret urned from niFgen_InitExtCal • channelName : "0" • configuration : The Current Configuration value for the current ...

  • National Instruments NI PXI-5422 - page 49

    © National Instruments Corporation 49 NI PXI-5422 Calibration Procedure 4. Call niFgen_SetAttributeViBoolean to set the analog filter state (niFgen property node: Outpu t Attributes»Analog Filter Enabled ) using the following parameters: • vi : The session handle ret urned from niFgen_InitExtCal • channelName : "0" • attributeID : ...

  • National Instruments NI PXI-5422 - page 50

    NI PXI-5422 Calibration Procedur e 50 ni.com 9. Call niFgen_SetAttributeViInt32 to set the analog path v alu e (niFgen property node: Output Attributes»Ana log Path ) usin g the following parameters: • vi : The session handle ret urned from niFgen_InitExtCal • channelName : "0" • attributeID : NIFGEN_ATTR_A NALOG_PATH • value : N ...

  • National Instruments NI PXI-5422 - page 51

    © National Instruments Corporation 51 NI PXI-5422 Calibration Procedure g. Call niFgen_Commit (niFgen Commit VI) to comm it the attribute v alues to the device using the following parameter: • vi : The session handle ret urned from niFgen_InitExtCal h. W ait 500 ms for the output to settle. i. Use the DMM to measure the vo ltage output by the de ...

  • National Instruments NI PXI-5422 - page 52

    NI PXI-5422 Calibration Procedur e 52 ni.com 12. Call niFgen_CalAdjustDirectPathGain (niFgen Cal Adjust Direct Path Gain VI) using the following parameters: • vi : The session handle ret urned from niFgen_InitExtCal • channelName : "0" • mainDACValues : An array containing two elements—the two va lu e s ( 32767 , – 32767 ) th at ...

  • National Instruments NI PXI-5422 - page 53

    © National Instruments Corporation 53 NI PXI-5422 Calibration Procedure 4. Call niFgen_SetAttributeViReal64 to set the of fset (niFg en property node: Arbitrary Waveform O utput»Arbitrary Waveform Offset ) using the following parameters: • vi : The session handle ret urned from niFgen_InitExtCal • channelName : "0" • attributeID : ...

  • National Instruments NI PXI-5422 - page 54

    NI PXI-5422 Calibration Procedur e 54 ni.com 9. Call niFgen_CreateArbWaveform (niFgen Create Arbitrary W av eform VI) using the following parameters: • vi : The session handle ret urned from niFgen_InitExtCal • wfmSize : The size in samples ( 500 ) of the wa veform you created in step 8 • wfmData : The array of wa veform sa mples that you cre ...

  • National Instruments NI PXI-5422 - page 55

    © National Instruments Corporation 55 NI PXI-5422 Calibration Procedure c. Call niFgen_InitiateGeneration (niFgen Initiate Generation VI) to initiat e the wav efor m generation using the following parameter: • vi : The session handle ret urned from niFgen_InitExtCal d. Measure the frequency of the ge nerated wa vefor m. This v alue is the measur ...

  • National Instruments NI PXI-5422 - page 56

    NI PXI-5422 Calibration Procedur e 56 ni.com 5. Call niFgen_SetAttributeViInt32 to set the of fset DA C value (niFgen property node: Calibra tion»Offset DAC Valu e ) using the following parameters: • vi : The session handle ret urned from niFgen_InitExtCal • channelName : "0" • attributeID : NIFGEN_ATTR_O FFSET_DAC_VALUE • value ...

  • National Instruments NI PXI-5422 - page 57

    © National Instruments Corporation 57 NI PXI-5422 Calibration Procedure • vi : The session handle ret urned from niFgen_InitExtCal • channelName : "0" • attributeID : NIFGEN_ATTR_OU TPUT_ENABLED • value : VI_TRUE 11. Call niFgen_Commit (niFgen Commit VI) to comm it the attribute values to the de vice using the following parameter ...

  • National Instruments NI PXI-5422 - page 58

    NI PXI-5422 Calibration Procedur e 58 ni.com • returnCalibratedValue : VI_FALSE • calADCValue : A V iReal64 variable. The v ariabl e passed by reference through this parameter receiv es the voltage measured by th e onboard ADC. Th is v alue is cal ADC measurement 0 , which is used in step 32. 19. Call niFgen_SetAttributeViBoolean to enable the ...

  • National Instruments NI PXI-5422 - page 59

    © National Instruments Corporation 59 NI PXI-5422 Calibration Procedure 27. Call niFgen_ReadCalADC (niFgen Read CAL ADC VI) to measure the analog output voltage with the onboard calibratio n ADC using the following parameters: • vi : The session handle ret urned from niFgen_InitExtCal • numberOfReadsToAverage : 3 • returnCalibratedValue : VI ...

  • National Instruments NI PXI-5422 - page 60

    NI PXI-5422 Calibration Procedur e 60 ni.com 33. Call niFgen_SetAttributeViBoolean to disable the analog output (niFgen property node: Basic Operation»Outpu t Enabled ) using the following parameters: • vi : The session handle ret urned from niFgen_InitExtCal • channelName : "0" • attributeID : NIFGEN_ATTR_O UTPUT_ENABLED • value ...

  • National Instruments NI PXI-5422 - page 61

    © National Instruments Corporation 61 NI PXI-5422 Calibration Procedure Calibration Utilities NI-FGEN supports several calibr ation utilities th at allow you to retrieve information about adjustments perform ed on the NI PXI-5422, restore an external calibration, change the exte rnal calibration password, and store small amounts of information in ...

  • National Instruments NI PXI-5422 - page 62

    NI PXI-5422 Calibration Procedur e 62 ni.com NI-FGEN NI-FGEN provides a full com plement of calibration util ity functions and VIs. Refer to the NI Signal Generators Help for t he complete functio n reference. The utility functions include: • niFgen_RestoreLastExtCalConstants • niFgen_GetSelfCalSupported • niFgen_GetSelfCalLastDateAndTime • ...

  • National Instruments NI PXI-5422 - page 63

    National Instruments, NI, ni.com, and LabVIEW are tradem arks of National Instruments Corporation. Refer to t he Terms of Use section on ni.com/legal for mor e information a bout National Instruments trademarks. Other product and company names mentioned herein are trademarks or t rade names of their respective companies . For patents covering Natio ...

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