After antenna alignment is complete, you can perform system calibration and determine all the
path losses in the system.
Related Information
mmWave OTA Validation Positioner Control Panel
on page 35
on page 11
CATR Chamber Internal Connections
Complete the steps in the following section after your NI services personnel has properly
installed, aligned, and verified alignment of the reflector and feed antenna in your CATR
chamber.
Notice
The reflector and feed antenna in the CATR chamber should only be
detached and/or mounted by NI services personnel. Contact the NI services
personnel contracted on your project to request these services for your CATR
chamber.
Aligning the Reference and Feed Antennas
CATR
Content applies to the CATR chamber.
Antenna alignment improves the repeatability and accuracy of your test. Complete the
following steps to align the positioner to the CATR plane wave whenever the absolute zero of
the positioner changes.
Ensure the following tasks are complete before you align the antennas:
•
Ensure the feed antenna and reflector are properly aligned by NI services personnel. If
anything has come into contact with the feed antenna or reflector and you think the parts
are misaligned, contact your NI services personnel for support.
•
Visually inspect the feed antenna and reflector for damage.
•
Attaching the Reference Antenna
•
Ensure the chamber door is closed.
1.
Open the mmWave OTA Validation Antenna Alignment Helper located at
<NIDir>
\OTA
Test\Antenna Alignment
.
2.
Select the
mmWave_VST
in the
Resource Name
list, and verify that the port strings in
the
SG Port
and
SA Port
textboxes are as follows.
SA Port
: The port string for the first connected mmRH-5582 to the feed antenna port V is
rf0/port1
.
SG Port
: The port string for the second connected mmRH-5582 is
rf1/port0
.
3.
Click
Start
to begin the alignment procedure.
The alignment procedure takes approximately 30 seconds and searches for the best
alignment position in both azimuth and elevation. The
Start
and
Commit Values to
Positioner
buttons are disabled during the procedure.
4.
Click
Commit Values to Positioner
when antenna alignment is complete.
mmWave OTA Validation Test Reference Architecture
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© National Instruments Corporation
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