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NI PXI-665x Calibration Procedure

2

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Software

This calibration procedure requires NI-Sync and NI-VISA. NI-Sync and 
NI-VISA support a number of application development environments 
(ADEs) and programming languages, including LabVIEW, 
LabWindows

/CVI

, and Microsoft Visual C++. When you install the 

drivers, you need to install support for only the ADE or programming 
language you are using. The illustrations in this document show the 
LabVIEW code for implementing calibration steps using NI-Sync and 
NI-VISA.

Documentation

You need the 

NI-Sync User Manual

 to calibrate the NI PXI-665

x

.

The 

NI-Sync User Manual

 contains detailed information about using 

the NI-Sync driver, including information about installing NI-Sync and 
creating applications that use the NI-Sync driver. These sources, along with 
this document, are your primary references for writing your calibration 
utility. You also can refer to the documentation for the programming 
language or application development environment you are using. For 
further information about the device you are calibrating, refer to the 

NI PXI-665x User Manual

.

Summary of Contents for NI PXI-665 Series

Page 1: ...g the Clock Source 4 Measuring the Frequency 6 Adjustment 10 Reverification 13 Where to Go for Support 14 Conventions The following conventions apply to this document The symbol leads you through nest...

Page 2: ...ns Software This calibration procedure requires NI Sync and NI VISA NI Sync and NI VISA support a number of application development environments ADEs and programming languages including LabVIEW LabWin...

Page 3: ...the NI PXI 665x in Slot 2 of the PXI chassis The calibration procedure requires features of PXI that are accessible only in slot 2 Use of an NI PXI 1044 or NI PXI 1045 chassis is recommended to reduc...

Page 4: ...e driver and application software is installed on the host computer 5 Configure the hardware properly with Measurement Automation Explorer MAX Refer to the NI PXI 665x Installation Guide for details a...

Page 5: ...tion Call Call niSync_init with the following parameters resourceName Dev1 idQuery NULL resetDevice VI_TRUE vi SessionHandle LabVIEW Block Diagram NI SYNC C Function Call Call niSync_SetAttributeViBoo...

Page 6: ...nc Initialize VI to set up a handle for the device b Set a writable NI Sync property node to pass TRUE to the ClkOut Gain Enable attribute LabVIEW Block Diagram NI SYNC C Function Call Call niSync_clo...

Page 7: ...on must be made sufficiently long Refer to Table 1 for the measurement duration to use LabVIEW Block Diagram NI SYNC C Function Call Call niSync_ConnectClkTerminals with the following parameters vi Se...

Page 8: ...agram NI SYNC C Function Call Call niSync_init with the following parameters resourceName Dev1 idQuery NULL resetDevice VI_FALSE vi SessionHandle LabVIEW Block Diagram NI SYNC C Function Call Call niS...

Page 9: ...r period following a calibration Table 2 One Year Test Limits Device Specified Accuracy Aging Acceptable Frequency Range As Found Low Limit High Limit NI PXI 6652 TCXO 3 5 ppm 9 999 965 Hz 10 000 035...

Page 10: ...plete steps a c to set the oscillator control voltage The range of acceptable voltage values is 0 0 V to 4 095 V with frequency increasing as voltage increases Use a control voltage of 2 0475 V which...

Page 11: ...quency section To obtain an accurate measurement for calibration the measurement duration must be made sufficiently long Refer to Table 1 Measurement Duration for the measurement duration to use Compl...

Page 12: ...Ranges 5 Commit the calibration values to the Calibration EEPROM using the following procedure a Call niSync Initialize External Calibration VI to initialize the process Note NI is the default user p...

Page 13: ...on section Re verifying after making the adjustments ensures that the NI PXI 665x is operating within its test limits LabVIEW Block Diagram NI SYNC C Function Call Call niSync_InitExtCal with the foll...

Page 14: ...s National Instruments corporate headquarters is located at 11500 North Mopac Expressway Austin Texas 78759 3504 National Instruments also has offices located around the world to help address your sup...

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