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7.
Unplug the calibration laser USB cable from the USB port.
8.
Remove the laser alignment fixture from the measurement antenna fixture.
After antenna alignment is complete, you can perform system calibration and determine all the
path losses in the system.
Related Information
mmWave OTA Test Positioner SFP
Performing System Calibration
Use the RF System Calibration Assistant to perform a full system calibration on all the
mmWave OTA Validation Test Reference Architecture hardware components.
NI recommends performing system calibration in any of the following situations:
•
After any module in the chassis is installed, uninstalled, or moved
•
After inter-module cabling has been changed, reconnected, or repositioned
•
After changing controllers, computers, or reinstalling software
•
After self-calibration is performed on the individual instruments
The following equipment is required for the system calibration procedure:
•
PXIe-5831 Vector Signal Transceiver and mmRH-5582 mmWave Radio Head
•
Rohde & Schwarz NRP50S Power Meter
Note
The Rohde & Schwarz NRP50S Power Meter requires software that is not
included with the mmWave OTA Validation Test Software. Install the power meter
driver software before you complete the following steps.
1.
Connect the power meter USB cable to the PXI chassis USB port.
2.
Open the RF System Calibration Assistant and click Start Calibration.
3.
In the Load Configuration Dialog dialog box, click the file button and browse to
C:\Users\Public\Public Documents\National Instruments\OTA Test
\System Calibration Files
4.
Select
OTA-Test-Cal-Base.cfg
Note
in Measurement & Automation Explorer (MAX) is
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configuration file or change it in MAX.
5.
Select Use existing calibration configuration.
The NI RF System Calibration Assistant Configurator window launches.
6.
In the Resources window, verify that all resources and resource settings are correct for
the path loss characterization as shown in the following figure. Ensure the resource name
for the power meter matches the name used in MAX.
18 | ni.com | mmWave OTA Validation Test Reference Architecture
on page 25
.
The calibration configuration assumes that the name of the PXIe-5831
as the name of the PXIe-5831, either change the name in the
and click Open.
. If you are not using
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