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CALIBRATION PROCEDURE

NI PXIe-6672

This document describes how to write a calibration procedure for the 
10 MHz oscillator frequency of the NI PXIe-6672 timing and 
synchronization module.

Contents

Conventions ............................................................................................ 1
Software .................................................................................................. 2
Documentation ........................................................................................ 2
Calibration Interval ................................................................................. 3
Password ................................................................................................. 3
Test Equipment ....................................................................................... 3
Test Conditions ....................................................................................... 3
Calibration Procedure ............................................................................. 4

Initial Setup...................................................................................... 4
Verification ...................................................................................... 4

Measuring the Frequency ......................................................... 6

Adjustment....................................................................................... 9
Reverification................................................................................... 13

Conventions

The following conventions apply to this document:

»

The 

»

 symbol leads you through nested menu items and dialog box options 

to a final action. The sequence 

File»Page Setup»Options

 directs you to 

pull down the 

File

 menu, select the 

Page Setup

 item, and select 

Options

 

from the last dialog box.

This icon denotes a note, which alerts you to important information.

This icon denotes a caution, which advises you of precautions to take to 
avoid injury, data loss, or a system crash.

 

When this symbol is marked on a 

product, refer to the 

Read Me First: Safety and Radio-Frequency 

Interference 

for information about precautions to t

ake.

Summary of Contents for Network Adapter NI PXIe-6672

Page 1: ...entions The following conventions apply to this document The symbol leads you through nested menu items and dialog box options to a final action The sequence File Page Setup Options directs you to pul...

Page 2: ...monospace italic Italic text in this font denotes text that is a placeholder for a word or value that you must supply Software This calibration procedure requires NI Sync and NI VISA NI Sync and NI V...

Page 3: ...timize connections and test conditions during the calibration procedure Install the NI PXIe 6672 in the system timing slot of the PXI Express chassis The calibration procedure requires features of PXI...

Page 4: ...cation software is installed on the host computer 5 Configure the hardware with Measurement Automation Explorer MAX Refer to the NI PXIe 6672 Installation Guide for details about configuring the PXI e...

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: ...ync 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_cl...

Page 7: ...et up a handle for the device LabVIEW Block Diagram NI SYNC C Function Call Call niSync_ConnectClkTerminals with the following parameters vi SessionHandle sourceTerminal NISYNC_VAL_OSCILLATOR destinat...

Page 8: ...ed in Step 3 of Measuring the Frequency with the specified accuracy Table 1 shows the frequency range that is acceptable according to the published specifications for the NI PXIe 6672 LabVIEW Block Di...

Page 9: ...ives a frequency as close as possible to 10 MHz 1 Complete 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 volta...

Page 10: ...3 of the Measuring the Frequency section Complete steps a c to measure PFI 0 a Call niSync Initialize VI to set up a handle for the device LabVIEW Block Diagram NI SYNC C Function Call Call niSync_Set...

Page 11: ...able Frequency 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...

Page 12: ...Call niSync_InitExtCal with the following parameters resourceName MAX ID password NI calibrationInstrumentHandle SessionHandle LabVIEW Block Diagram NI SYNC C Function Call Call niSync_CalAdjustOscil...

Page 13: ...vering National Instruments products refer to the appropriate location Help Patents in your software the patents txt file on your CD or ni com patents 2007 National Instruments Corporation All rights...

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