Analyzer Calibration Settings
The frequency spacing settings, including levels at which to calibrate, are selected by default.
For OTA, it is important to set the reference level low enough to get low variation.
Getting Started with Step-by-Step Position Sweeping
With step-by-step position sweeping, sweeping is exclusively controlled by the test execution
engine which consumes a list of predefined positions and sequentially performs a
measurement at each point.
Step-by-step position sweeping consists of the following typical process flow:
•
Move the positioner to the desired position
•
Set up your DUT
•
Set up the instrument
•
Take the measurement
•
Repeat the setup and measurement for each position
Complete the following actions before getting started with step-by-step 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.
•
Configure TestStand to include the following search paths, including subdirectories, in
the search directories:
–
C:\Program Files\National Instruments\LabVIEW 2018\user.lib
\OTA Test
–
C:\Program Files\National Instruments\LabVIEW 2018\instr.lib
–
C:\Program Files\National Instruments\LabVIEW 2018\vi.lib
\RFmx
•
Configure TestStand to call LabVIEW Development System (64-bit).
Complete the following steps to perform a full antenna pattern test step-by-step.
1.
Navigate to
C:\Users\Public\Public Documents\National Instruments
\TestStand 2019 (64-bit)\Examples\OTA Test\Sequences
and open the
CSV settings file,
Step_by_Step_TRP.csv
.
2.
Verify that the individual modules are named correctly in MAX. If the names do not
match, either change the name in MAX to match the file or change the file to match your
MAX settings.
3.
Open the
Step_by_Step_TRP.seq
TestStand sequence, located at
C:\Users
\Public\Public Documents\National Instruments\TestStand 2019
(64-bit)\Examples\OTA Test\Sequences
.
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mmWave OTA Validation Test Reference Architecture
