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7.

If adjustment was successful, commit the calibration values to device memory. If
adjustment was unsuccessful, cancel the external adjustment action; the chassis may be in
need of repair.
a.

Using the resource handle obtained in step 1d, set the 

CalExtAction

 property to

Commit (or Cancel if adjustment was unsuccessful).

b.

Call Save Changes to commit these changes to hardware.

8.

Update the External Calibration Date and External Calibration Due Dates by calling the
System Configuration function 

Update Calibration

. This VI uses the hardware resource

handle opened in step 1d.

Note

 

Calling the 

CalExtAction

 property with 

Commit

 updates the External

Calibration Date, but not the External Calibration Due Date. Calling the

CalExtAction

 property with 

Cancel

 updates neither.

Reverification

Repeat the 

Verification

 section to determine the device as-left status. If the measured value is

within the low-limit and high-limit range listed in Table 3, the chassis is considered to be
calibrated, and no further adjustment is needed.

Note

 

If any test fails reverification after performing an adjustment, verify that you

have met the 

Test Conditions

 before returning your device to NI. Refer to 

Where to

Go for Support

 for information about support resources or service requests.

Where to Go for Support

The National Instruments website is your complete resource for technical support. At 

ni.com/

support

 you have access to everything from troubleshooting and application development self-

help resources to email and phone assistance from NI Application Engineers.

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 support needs. For telephone support in the United States, create your
service request at 

ni.com/support

 and follow the calling instructions or dial 512 795 8248. For

telephone support outside the United States, visit the Worldwide Offices section of 

ni.com/

niglobal

 to access the branch office websites, which provide up-to-date contact information,

support phone numbers, email addresses, and current events.

6

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ni.com

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PXIe-1092 Calibration Procedure

Summary of Contents for PXIe-1092

Page 1: ...following software on the calibration system PXI Platform Services 18 1 or later You can download PXI Platform Services from ni com downloads PXI Platform Services supports programming the calibration...

Page 2: ...beginning the calibration process The following setup and environmental conditions are required to ensure the PXIe 1092 chassis meets published specifications Keep cabling as short as possible Long c...

Page 3: ...Counter gate time to 3 seconds 4 Measure the OCXO frequency using the Frequency Counter 5 Compare the measured frequency to the device specifications To determine whether the device under test meets i...

Page 4: ...te You can use a binary search algorithm to find the optimal oscillator control voltage The PXIe 1092 uses a 16 bit digital to analog convertor DAC to create the oscillator control voltage therefore y...

Page 5: ...h frequency increasing as the value increases Use a DAC value of 32768 which is in the middle of the valid range as a starting point a Using the same resource handle set the DacValue property to the n...

Page 6: ...er adjustment is needed Note If any test fails reverification after performing an adjustment verify that you have met the Test Conditions before returning your device to NI Refer to Where to Go for Su...

Page 7: ...nts EULAs and third party legal notices in the readme file for your NI product Refer to the Export Compliance Information at ni com legal export compliance for the NI global trade compliance policy an...

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