4.
Run the sequence.
Notice
Verify that nothing interferes with the motion of the positioner. The
sequence triggers motion which may cause damage if anything interferes with
the positioner.
The sequence runs for about 20 minutes collecting data at 5° intervals in both azimuth
and elevation.
Use the mmWave OTA Test Visualizer to visualize the data in the CSV file that is created in
the Results folder, located in the same directory as the Sequences folder.
Your system is fully operational if the sequence finishes without error and you can display a
3D antenna pattern from the antenna. To verify the accuracy of the test, refer to
Related Information
mmWave OTA Test Positioner SFP
on page 27
Getting Started With Autonomous Position Sweeping
With autonomous position sweeping, the measurement initiation is triggered by the positioner
instead of the test execution engine. This mode drastically reduces test time.
The motor control sends a digital trigger that causes the instrumentation to execute the
measurement at predefined points in the motion path. The measurement results and absolute
coordinates of the positioner are stored in a table to link each measurement with its exact
position later during results processing. During autonomous position sweeping, motion is
supervised by the test execution engine while all the measurements happen in a separate
autonomous thread driven by hardware signals.
Use autonomous sweeping when your main task is to get a large number of power
measurements around the sphere in a single configuration. This means validating a specific
codebook item, frequency, or polarization.
Complete the following actions before getting started with autonomous position sweeping.
•
Verify that the hardware connections are configured as specified in
on page 11.
•
Remove the laser alignment fixture.
•
Use the mmWave OTA Test Positioner SFP to verify that your DUT can move in all
directions without collision.
mmWave OTA Validation Test Reference Architecture
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© National Instruments
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