National Instruments mmWave OTA User manual

USER MANUAL
mmWave OTA Validation Test
Reference Architecture
The mmWave OTA Validation Test Reference Architecture integrates mmWave signal
generation and analysis instrumentation, an anechoic chamber, a positioner, and positioner
control, providing the ability to measure the complete radiated field of the DUT in all
transmitting directions.
This manual contains hardware and software information, including step-by-step procedures
and basic information about how to begin using the mmWave OTA Validation Anechoic
Chamber and instrumentation with the mmWave OTA Validation Test Software.
Notice The protection provided by this equipment may be impaired if it is used in
a manner not described in the documentation.
Contents
Hardware Overview.................................................................................................................. 2
Software Overview................................................................................................................... 2
Chamber Overview................................................................................................................... 5
Chamber Exterior..............................................................................................................5
Chamber Interior............................................................................................................... 9
Getting Started........................................................................................................................ 12
What You Need to Get Started........................................................................................12
Operating the Chamber................................................................................................... 14
Verifying System Setup...................................................................................................15
Performing System Calibration.......................................................................................26
Getting Started with Step-by-Step Position Sweeping................................................... 30
Getting Started with Autonomous Position Sweeping....................................................32
Programming...........................................................................................................................35
Soft Front Panels.............................................................................................................35
mmWave OTA Validation Configurator......................................................................... 36
OTA Measurement Interface...........................................................................................46
Antenna Plugin................................................................................................................47
Where to Go Next................................................................................................................... 48

Hardware Overview
The mmWave OTA Validation Test Reference Architecture comprises the following hardware:
• mmWave OTA Validation Anechoic Chamber options
– Direct far field (DFF) chamber
– Compact antenna test range (CATR)/indirect far field (IFF) chamber
Note The CATR chamber requires the mmWave OTA Validation CATR Kit.
To request that your DFF chamber be converted to a CATR chamber, contact
the NI services personnel contracted on your project.
• mmWave OTA Validation Accessories Kit
• Instrumentation
– PXIe-5831 Vector Signal Transceiver—IF and mmWave instrument configuration
with two mmRH-5582 mmWave Radio Heads (direct TRX ports only)
– PXIe-6361 Multifunction I/O Module
– PXIe-1092 or PXIe-1095 PXI Chassis
Content applies to all mmWave OTA Validation Anechoic Chamber options unless otherwise
noted.
DFF
Content applies to the DFF chamber.
CATR
Content applies to the CATR chamber.
Note This manual contains only detailed reference information for using the
mmWave OTA Validation Anechoic Chamber with the instrumentation. Refer to the
documentation for the individual instruments for basic information about
installation, configuration, and operation of each instrument.
Note Refer to the documentation included with the mmWave OTA Validation
Anechoic Chamber for safety requirements and maintenance information.
Related Information
What You Need to Get Started on page 12
Chamber Exterior on page 5
DFF Chamber Interior on page 9
CATR Chamber Interior on page 10
Software Overview
The mmWave OTA Validation Test Software comprises the following components for
interfacing and controlling the mmWave OTA Validation Anechoic Chamber and
instrumentation.
2| ni.com | mmWave OTA Validation Test Reference Architecture

mmWave OTA Validation Configurator
Use the mmWave OTA Validation Configurator to configure an OTA sweep and access all the
tools needed for your OTA test workflow. The mmWave OTA Validation Configurator creates
a configuration file that you can use with TestStand template sequences or C# code. The
mmWave OTA Validation Configurator also integrates the mmWave OTA Validation
Visualizer so you can easily view your test results from the same interface.
TestStand Template Startup Sequences
Use the installed TestStand template sequences to run the configuration files that you create
with the mmWave OTA Validation Configurator. The template sequences control all aspects of
your OTA test and are open-source to enable customization of your test plan.
mmWave OTA Validation Visualizer
Use the mmWave OTA Validation Visualizer to complete offline analysis of the test data for
antenna measurements.
mmWave OTA Validation Positioner Control Panel
Use the mmWave OTA Validation Positioner Control Panel to control the movement of the
positioner.
Positioner Modes of Operation
The 3GPP standard for OTA test of 5G NR DUTs requires making power measurements in a
spherical grid around the DUT. This process can take a significant amount of time due to the
large number of points to test, the movement of the DUT positioner, and coordination with the
measurement equipment. NI provides two modes of operation for the positioner: Step-by-Step
Position Sweeping and Autonomous Position Sweeping.
OTA Measurement Interface (OTAMI)
Use the OTAMI LabVIEW interface to store your measurements and compute the most
common OTA measurements:
mmWave OTA Validation Test Reference Architecture | © National Instruments Corporation | 3

Measurements • Beam center
• Beam direction
• Effective isotropic radiated power (EIRP)
• First null beamwidth
• Half power beamwidth (HPBW)
• Total radiated power (TRP)
• NR adjacent channel power (ACP)
• NR channel power (CHP)
• NR error vector magnitude (EVM)
• NR occupied bandwidth (OBW)
• NR spectral emission mask (SEM)
Visualizations • 1D cut analysis
• 1D polar plot
• 3D antenna pattern
• Best beam index
• Heat map
Plugin Interfaces
Use the LabVIEW plugin interfaces to customize and adapt the mmWave OTA Validation Test
Reference Architecture for your testing environment. To enable the highest degree of
customization, NI provides the source code for the plugins. The following plugins are installed
with the mmWave OTA Validation Test Software.
•Antenna Control—An API framework that allows you to create a plugin to control your
specific active antenna module.
•Positioner Control—An API that allows you to use a different positioner with the
mmWave OTA Validation Anechoic Chamber. If your application requires a different
positioner, contact the NI services personnel contracted on your project for more
information about using this plugin.
Measurement Software
Use RFmx SpecAn and RFmx NR to control the instrumentation and configure 3GPP 5G NR
and spectrum measurements. The mmWave OTA Validation Test Software supports RFmx NR
4| ni.com | mmWave OTA Validation Test Reference Architecture

ACP, CHP, EVM, OBW, and SEM measurements. Refer to the RFmx NR Help at ni.com/
manuals for more information about NR measurements.
Related Information
mmWave OTA Validation Configurator on page 36
Use the mmWave OTA Validation Configurator to configure, execute, and visualize your
OTA test measurements.
Visualizing Measurements on page 38
mmWave OTA Validation Positioner Control Panel on page 35
RFmx Soft Front Panels on page 36
OTA Measurement Interface on page 46
Antenna Plugin on page 47
OTA API Reference
Chamber Overview
Chamber Exterior
Top Bulkhead
Notice To avoid damage to chamber connectors, connect only cables that have the
correct connector type.
1A
2A
1B
2B
1A
2A
1B
2B
3A
4A
3B
4B
VHDCI
RJ45-1 USB2.0-1
VGA
RESET AM
E-STOPButton
15
1
DC
USB3.0/2.0
RFfilter
ThermalT Type 1/2
1A 2A 1B 2B
1A
2A
1B
2B
1A
2A
1B
2B
3A
4A
3B
4B
mmWave OTA Validation Test Reference Architecture | © National Instruments Corporation | 5

Table 1. Connector Descriptions
Connector Connector Type Use
1A through 4A 2.4 mm Connects to the measurement antenna for horizontal and
vertical polarization. Ports 3A and 4A are reserved for
applications that use multiple antennas.
1B through 4B 2.92 mm Reserved for applications ≤40 GHz. The mmWave OTA
Validation Accessories Kit includes only 2.4 mm cables.
Side Control Panel
1A
2A
1B
2B
1A
2A
1B
2B
3A
4A
3B
4B
VHDCI
RJ45-1 USB2.0-1
VGA
RESET AM
E-STOPButton
15
1
DC
USB3.0/2.0
RFfilter
ThermalT Type 1/2
1A 2A 1B 2B
VHDCI
RJ45-1 USB2.0-1
VGA
RESET A M
E-STOP Button
15
1
Table 2. Connector Descriptions
Connector Connector
Type
Use
VHDCI VHDCI Connects to the PXIe-6361 Multifunction I/O Module
VHDCI connector for data acquisition of the state of the
positioner. This is required for autonomous operation.
RJ45-1 RJ45 Connects to the Ethernet port 1 on the PXI controller to
control the positioner.
USB2.0-1 USB Reserved for internal use.
VGA VGA Reserved for internal use.
6| ni.com | mmWave OTA Validation Test Reference Architecture

Table 2. Connector Descriptions (Continued)
Connector Connector
Type
Use
E-Stop — Stops all motion within the chamber immediately.
Reset — Resets the chamber to the default operational state.
A — M
(Automatic or
Manual)
Key Switch Overrides the automatic lock feature on the exterior of the
chamber door when set to Manual. NI does not
recommend using the override feature during normal
operation.
Rear Bulkhead
1A
2A
1B
2B
1A
2A
1B
2B
3A
4A
3B
4B
DC
USB3.0/2.0
RF filter
Thermal T Type 1/2
1A 2A 1B 2B
DC
USB3.0/2.0
RFfilter
ThermalT Type 1/2
1A 2A 1B 2B
VHDCI
RJ45-1 USB2.0-1
VGA
RESET AM
E-STOPButton
15
1
Table 3. Connector Descriptions
Connector Connector Type Use
DC RF Filter Eight 4A 24 V filtered
DC connectors,
5.08 mm (8 position)
Supplies power to the DUT or other internal
DC needs.
Thermal T Type
(x2)
Thermocouple Monitors two different temperatures inside
the chamber.
mmWave OTA Validation Test Reference Architecture | © National Instruments Corporation | 7

Table 3. Connector Descriptions (Continued)
Connector Connector Type Use
1A, 2A 2.4 mm Reserved for system calibration and DUTs
with >40 GHz inputs.
1B, 2B 2.92 mm Reserved for DUTs with ≤40 GHz inputs.
USB 3.0 USB Supplies a filtered USB connection into the
chamber for any DUT needs. Use the USB
3.0, 1.5 m maximum length cable included
in the chamber shipping kit to connect the
chamber to your PC.
Note Use the AC switch on the rear of the chamber to power on the system.
Related Information
External Connections on page 15
Operating the Chamber on page 14
8| ni.com | mmWave OTA Validation Test Reference Architecture

Chamber Interior
DFF Chamber Interior
1 2
3
1. Arch
2. Measurement Antenna Fixture
3. Positioner
Note Although the arch can hold multiple antennas to support multi-antenna
positions at equidistant places from the DUT center of rotation, it holds only one
antenna for the mmWave OTA Validation Test Reference Architecture.
Related Information
Internal Connections on page 19
mmWave OTA Validation Test Reference Architecture | © National Instruments Corporation | 9

CATR Chamber Interior
1
3
2
1. Reflector
2. Positioner
3. Feed Antenna
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.
Related Information
Internal Connections on page 19
10 | ni.com | mmWave OTA Validation Test Reference Architecture

Positioner Coordinate System
ϕ
x
y
z
θ
Note The x-axis points toward the measurement antenna in the preceding image.
•Azimuth Φ Rotation—The arrow points in a positive direction for the positioner; +90°
in azimuth rotates the positioner so the y-axis points toward the measurement antenna.
•Elevation θ Rotation—The arrow points in a positive direction for the positioner; -90° in
elevation rotates the positioner so the z-axis points toward the measurement antenna.
Related Information
mmWave OTA Validation Positioner Control Panel on page 35
Visualizing Measurements on page 38
mmWave OTA Validation Test Reference Architecture | © National Instruments Corporation | 11

Getting Started
Refer to the topics in this section to get started using the mmWave OTA Validation Test
Reference Architecture. Complete the tasks in the following table in sequential order to ensure
your system is ready for use.
Step Task Where to Go
1 Verify external chamber and
instrument connections.
External Connections on page 15
2 Connect the chamber to a client PC. Connecting the Chamber to a Client PC on
page 18
3 Configure instrument settings in
MAX.
Configuring Settings in MAX on page 18
4 Verify internal chamber cable
connections, attach antennas, and
perform antenna alignment.
Internal Connections on page 19
5 Calibrate the system. Performing System Calibration on page 26
6 Perform a full antenna pattern test. Getting Started with Step-by-Step Position
Sweeping on page 30
7 Perform a fast full antenna pattern
test.
Getting Started with Autonomous Position
Sweeping on page 32
What You Need to Get Started
Depending on your application, you may require a different variation of the items listed below.
Contact the NI services personnel contracted on your project to help you determine which
variation your application requires.
Table 4. mmWave OTA Validation Test Reference Architecture Components
Component Kit Contents NI PN
mmWave OTA Validation
Anechoic Chamber1
Laser Alignment Kit —
Dual-Polarized Measurement Antenna
Fixture
—
DRH50 Dual Ridge Horn Antenna
Fixture
—
1If you have requested that your DFF chamber be converted to a CATR chamber, NI services
personnel will install the components included in your mmWave OTA Validation CATR Kit.
12 | ni.com | mmWave OTA Validation Test Reference Architecture

Table 4. mmWave OTA Validation Test Reference Architecture Components (Continued)
Component Kit Contents NI PN
mmWave OTA Validation
Accessories Kit
PXIe-6361 Multifunction I/O Module 781055-01
SHC68-C68-RDIO2 Digital Cable 186380E-02
Dual-Polarized Measurement Antenna 754959-01
DRH50 Dual Ridge Horn Antenna 754960-01
3 dB 2.4 mm attenuator (x4) 614224-01
1.85 mm (m)-to-1.85 mm (m) cable,
8 in. (x4)
769636-0R200
2.4 mm (m)-to-2.4 mm (m) cable,
48 in. (x2)
769753-1219
2.4 mm (m)-to-2.4 mm (m) flexible
cable, 48 in. (x2)
769754-1219
Ethernet cable —
SMA (m)-to-SMA (m) cable, 48 in.
(x4)
769755-048
SMA (f)-to-2.4 mm (m) adapter 773463-01
Required Instrumentation
• PXIe-5831 Vector Signal Transceiver—IF and mmWave instrument configuration with
two mmRH-5582 modules (direct TRX ports only)
• PXIe-1092 or PXIe-1095 PXI Chassis
• PXI Express embedded controller or MXI controller system that meets the system
requirements specified in the chassis documentation.
• AC power cable
Optional Items
• 0.9 N · m (8 lb · in.) calibrated torque wrench, 5/16 in. (NI part number 751120-01)
Required Software
To use the mmWave OTA Validation Test Software, you must also install NI ADEs, driver
software, and application software. Refer to the mmWave OTA Validation Test Software
Readme at ni.com/manuals for information about required software and compatible software
versions.
mmWave OTA Validation Test Reference Architecture | © National Instruments Corporation | 13

Required Software for Instrumentation
The following instruments require specific driver software that is not installed with the
mmWave OTA Validation Test Software. Refer to the instrument documentation available at
ni.com/manuals for more information about installing required driver software.
•PXIe-5831 Vector Signal Transceiver and mmRH-5582 mmWave Radio Head
•PXIe-6361 Multifunction I/O Module
•PXIe-1095 Chassis or PXIe-1092 Chassis
Operating the Chamber
You must complete the following actions when operating the chamber.
Notice The leakage current from the EMI AC filter inside the chamber may cause
certain residual current circuit breakers (RCCB) to trip. Use the external isolator
provided with the chamber if you are connecting the chamber to an RCCB.
Power On and Reset the Chamber
Complete either of the following actions after you power on the chamber.
• If the key switch is set to Manual, press the Reset button.
• If the key switch is set to Auto, close the chamber door, then press the Reset button.
Opening the Chamber Door During Operation
It is important that the chamber door remain closed when you are performing a test. If the key
switch is set to Auto and you open the door during operation, all movement in the chamber
stops and you must press Reset to return the chamber to the default state. No action is required
if the key switch is set to Manual and you open and close the door during operation.
Related Information
Chamber Exterior on page 5
Changing the Chamber IP Address
Notice Changing the IP address is a low-level function of the internal controller in
the chamber and must only be changed if necessary. If the IP address is not updated
correctly, the chamber may not function properly.
You must use Internet Explorer to complete the following steps.
1. On the client PC connected to the chamber, open Internet Explorer and enter
192.168.2.10 in the address bar.
The NI Web-Based Configuration and Monitoring utility opens.
2. Click the Login button and enter admin in the User name field and leave the password
field blank.
3. Change the system password:
a) Click the Security Configuration button in the toolbar.
b) Double-click admin in the list of users under the Users tab.
14 | ni.com | mmWave OTA Validation Test Reference Architecture

c) Click Change Password.
d) Enter and re-enter a new password.
e) Click OK.
f) Click Save.
g) Click OK to confirm you are changing the password.
Note NI cannot recover lost system passwords. If you forget the
password, you must contact NI and reformat the controller.
4. Login using the new credentials.
5. Click the Remote File Browser button in the toolbar.
6. Browse to / »C and double click the motion_config.ini file to open it.
7. Change the IP address in the file and click Save Changes.
8. Click the Network Configuration button in the toolbar, and update the IPv4 Address
field with the new IP address.
9. When prompted, restart the controller.
To verify the IP address is updated, enter the new IP address into Internet Explorer to open the
NI Web-Based Configuration and Monitoring utility. Login to the utility and repeat steps 5-6
and verify that the IP address is correct in the file.
If the controller cannot be found or is incorrectly configured, contact NI to restore the original
settings.
Verifying System Setup
Before you begin using the mmWave OTA Validation Anechoic Chamber, refer to the
following sections to verify the external and internal hardware connections, configure
instrument settings in Measurement & Automation Explorer (MAX), and connect the chamber
to a client PC.
External Connections
The external chamber connections differ depending on your chamber configuration. Refer to
the following figures to ensure that all required instrumentation is properly configured with the
chamber before use.
Note
• The following figures do not show the PXIe-5831 installed in the chassis or the
required connections between the PXIe-5831 and mmRH-5582. Refer to the
PXIe-5831 Getting Started Guide at ni.com/manuals to verify that the
PXIe-5831 and all mmRH-5582 modules are properly interconnected.
• Refer to the PXIe-6361 and the PXIe-1092 or PXIe-1095 documentation at
ni.com/manuals for detailed installation instructions.
mmWave OTA Validation Test Reference Architecture | © National Instruments Corporation | 15

Figure 1. DFF Chamber Connected to Instrumentation
PS TEMP FANS
PXIe-1095
18
17
16
15
14
13
12
11
10
9
8
7
HHHHH
6
5 4
3
2
1
NI PXIe-8880
Embedded Controller
GPIB DRIVE
PWR OK /
FAULT
USER1
USER2
10/100
/1000
ACT/
LINK
10/100
/1000
ACT/
LINK
TRIG
RESET
1
2
DP
CONNECTOR2 (AI 80-143)CONNECTOR2 (AI 80-143) CONNECTOR0 (AI 0-15, AO,DIO)CONNECTOR0 (AI 0-15, AO, DIO)
CONNECTOR1 (AI 16-79)CONNECTOR1 (AI 16-79)
NI PXIe-6365NI PXIe-6365
MultifunctionDAQMultifunctionDAQ
DC
USB3.0/2.0
RFfilter
ThermalT Type 1/2
1A 2A 1B 2B
1A
2A
1B
2B
1A
2A
1B
2B
3A
4A
3B
4B
DIRECT TRX PORTSDIRECTTRX PORTS
mmRH-5582mmRH-5582
mmWave Radio HeadmmWave Radio Head
ALLPORTSALLPORTS
5050
ΩΩ
2.4mm2.4mm
RXINPUT MAX POWERRXINPUT MAX POWER
REFPWRREFPWR ≤≤ +30dBm+30 dBm
PMAX= REF PWR +6 dBPMAX= REF PWR +6 dB
REFPWRREFPWR >> +30dBm+30 dBm
PMAX=+36 dBmPMAX=+36 dBm
0011
VHDCI
RJ45-1 USB2.0-1
VGA
RESET AM
E-STOPButton
15
1
DIRECT TRX PORTSDIRECTTRX PORTS
mmRH-5582mmRH-5582
mmWave Radio HeadmmWave Radio Head
ALLPORTSALLPORTS
5050
ΩΩ
2.4mm2.4mm
RXINPUT MAX POWERRXINPUT MAX POWER
REFPWRREFPWR ≤≤ +30dBm+30 dBm
PMAX= REF PWR +6 dBPMAX= REF PWR +6 dB
REFPWRREFPWR >> +30dBm+30 dBm
PMAX=+36 dBmPMAX=+36 dBm
0011
8 7 3 4
6 521
Figure 2. CATR Chamber Connected to Instrumentation
PS TEMP FANS
PXIe-1095
18
17
16
15
14
13
12
11
10
9
8
7
HHHHH
6
5 4
3
2
1
NI PXIe-8880
Embedded Controller
GPIB DRIVE
PWR OK /
FAULT
USER1
USER2
10/100
/1000
ACT/
LINK
10/100
/1000
ACT/
LINK
TRIG
RESET
1
2
DP
CONNECTOR2 (AI 80-143)CONNECTOR2 (AI 80-143) CONNECTOR0 (AI 0-15, AO,DIO)CONNECTOR0 (AI 0-15, AO, DIO)
CONNECTOR1 (AI 16-79)CONNECTOR1 (AI 16-79)
NI PXIe-6365NI PXIe-6365
MultifunctionDAQMultifunctionDAQ
DC
USB3.0/2.0
RFfilter
ThermalT Type 1/2
1A 2A 1B 2B
1A
2A
1B
2B
1A
2A
1B
2B
3A
4A
3B
4B
DIRECT TRX PORTSDIRECTTRX PORTS
mmRH-5582mmRH-5582
mmWave Radio HeadmmWave Radio Head
ALLPORTSALLPORTS
5050
ΩΩ
2.4mm2.4mm
RXINPUT MAX POWERRXINPUT MAX POWER
REFPWRREFPWR ≤≤ +30dBm+30 dBm
PMAX= REF PWR +6 dBPMAX= REF PWR +6 dB
REFPWRREFPWR >> +30dBm+30 dBm
PMAX=+36 dBmPMAX=+36 dBm
0011
VHDCI
RJ45-1 USB2.0-1
VGA
RESET AM
E-STOPButton
15
1
DIRECT TRX PORTSDIRECTTRX PORTS
mmRH-5582mmRH-5582
mmWave Radio HeadmmWave Radio Head
ALLPORTSALLPORTS
5050
ΩΩ
2.4mm2.4mm
RXINPUT MAX POWERRXINPUT MAX POWER
REFPWRREFPWR ≤≤ +30dBm+30 dBm
PMAX= REF PWR +6 dBPMAX= REF PWR +6 dB
REFPWRREFPWR >> +30dBm+30 dBm
PMAX=+36 dBmPMAX=+36 dBm
0011
8 7
6 5 3 421
16 | ni.com | mmWave OTA Validation Test Reference Architecture

Figure
Callout
Connection
1 The first mmRH-5582 module, RF0, connects to the PXIe-5831 (not pictured).
2 The second mmRH-5582 module, RF1, connects to the PXIe-5831 (not
pictured).
3
DFF
A 3 dB attenuator connects to the first mmRH-5582 TRX Port 0,
which then connects to the chamber top bulkhead 1A port using an 8 in.
1.85 mm-to-1.85 mm cable.
CATR
A 3 dB attenuator connects to the first mmRH-5582 TRX Port 0,
which then connects to the chamber rear bulkhead 1B port using a 2.92 mm
(m)-to-2.4 mm (f) adapter and 23.6 in. 2.4 mm-to-2.4 mm cable.
4
DFF
A 3 dB attenuator connects to the first mmRH-5582 module TRX Port
1, which then connects to the chamber top bulkhead 2A port using an 8 in.
1.85 mm-to-1.85 mm cable.
CATR
A 3 dB attenuator connects to the first mmRH-5582 module TRX Port
1, which then connects to the chamber rear bulkhead 2B port using a 2.92 mm
(m)-to-2.4 mm (f) adapter and 23.6 in. 2.4 mm-to-2.4 mm cable.
5 A 3 dB attenuator connects to the second mmRH-5582 module TRX Port 0,
which then connects to the chamber rear bulkhead 1A port using a 48 in.
2.4 mm-to-2.4 mm cable.
6 A 3 dB attenuator connects to the second mmRH-5582 module TRX Port 1,
which then connects to the chamber rear bulkhead 2A port using a 48 in.
2.4 mm-to-2.4 mm cable.
7 The PXIe-6361 Connector 0 connects to the chamber control panel VHDCI
connection using the SHC68-C68-RDIO2 digital cable.
8 The PXI chassis Ethernet connects to the chamber control panel Ethernet
connection.
Related Information
Chamber Exterior on page 5
mmWave OTA Validation Test Reference Architecture | © National Instruments Corporation | 17

Connecting the Chamber to a Client PC
Connect the mmWave OTA Validation Anechoic Chamber to a client PC using a direct
connection.
Tip For best results, dedicate one Ethernet port for the communication and connect
the Ethernet cable from that port directly to the client PC to avoid slow hubs or
switches.
Note The Ethernet port on the client PC must use the same subnet as the host
chamber. For example, if you use the default fixed IP address for the chamber
(192.168.2.10), use 192.168.2.1 for the client PC. If you are connecting
multiple clients to the host chamber through a switch, each client must have a unique
IP address on the same subnet as the host.
Verify the Connection
To verify that the chamber is connected to the client PC, open a Command Prompt window
and enter "ping 192.168.2.10".
Configuring Settings in MAX
You must configure and rename your instruments in Measurement & Automation Explorer
(MAX) before you begin taking measurements.
1. Launch MAX.
2. In the configuration tree, expand Devices and Interfaces to see the list of installed NI
hardware. Installed instruments appear under the name of the associated chassis.
3. Within the Settings section for each instrument, enter the new name in the Name textbox
as shown in the following table:
Instrument Updated Name
PXIe-6361 DAQ
PXIe-3622 mmWave_VST
4. Click Save in the MAX toolbar after you change the name for each instrument.
5. In the configuration tree, select the PXIe-1095 chassis.
6. On the Triggers tab, route the following PXI trigger lines between the PXIe-6361 and
PXIe-5831:
a) Set PXI_Trig0 to be away from the PXIe-6361 bus segment to the PXIe-3622 bus
segment.
b) Set PXI_Trig1 to be away from the PXIe-3622 bus segment to the PXIe-6361 bus
segment.
7. Click Save.
18 | ni.com | mmWave OTA Validation Test Reference Architecture

Internal Connections
The internal chamber connections may differ depending on your specific application. Refer to
the following section to ensure the components within the mmWave OTA Validation Anechoic
Chamber are properly configured for system calibration.
Note The tasks in this section are applicable for both the CATR and DFF chambers
unless otherwise noted.
Related Information
DFF Chamber Interior on page 9
CATR Chamber Interior on page 10
Connecting Internal RF Cables
1. Connect one end of two 2.4 mm (m)-to-2.4 mm (m) cables to the interior chamber rear
bulkhead 1A and 2A ports.
2. Route the opposite end of the cables through the correct locations on the positioner, as
shown in the following figure.
mmWave OTA Validation Test Reference Architecture | © National Instruments Corporation | 19

Figure 3. RF Cables Routed through Positioner
1
1. 2.4 mm (m)-to-2.4 mm (m) Cable (x2)
Notice The internal cables are subject to movement and can interfere with
testing if not properly managed.
Attaching the Reference Antenna
The reference antenna verifies the functionality and integrity of the system during system
calibration and ensures that the system is ready for testing your DUT.
1. Mount the reference antenna to the azimuth axis as shown in the following figure.
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