Figure 6. Reference Antenna Pointing Misalignment
To minimize the measurement uncertainty introduced by improper antenna alignment,
complete the following steps before performing system calibration.
1.
Launch the mmWave OTA Validation Positioner Control Panel.
2.
Set the
Elevation
near -90° to rotate the positioner so the reference antenna points
straight up toward the measurement antenna, then set the
Azimuth
so the arrow on the
positioner rotor points to 0 on the positioner dial scale, as shown in
3.
Attach the calibration laser to the laser alignment fixture and plug the laser USB cable
into the USB port inside the chamber.
4.
Secure the laser alignment fixture to the measurement antenna fixture using an Allen
wrench to tighten the screws and alignment pins on the fixture.
mmWave OTA Validation Test Reference Architecture
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© National Instruments Corporation
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