National Instruments MmWave Manuale utente

USER GUIDE

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

Hardware Components..............................................................................................................4

mmWave OTA Validation Anechoic Chamber Exterior................................................... 4

mmWave OTA Validation Anechoic Chamber Interior.................................................... 8

Getting Started.......................................................................................................................... 8

What You Need to Get Started..........................................................................................9

Operating the Chamber................................................................................................... 10

Verifying Hardware Connections....................................................................................11

Performing System Calibration.......................................................................................18

Getting Started with Step-by-Step Position Sweeping................................................... 22

Getting Started With Autonomous Position Sweeping................................................... 23

Software Reference................................................................................................................. 25

Soft Front Panels.............................................................................................................25

mmWave OTA Test Visualizer........................................................................................27

OTA Measurement Interface...........................................................................................33

Antenna Plugin................................................................................................................33

Where to Go Next................................................................................................................... 34

Hardware Overview

The mmWave OTA Validation Test Reference Architecture comprises the following hardware:

• mmWave OTA Validation Anechoic Chamber

• 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

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

mmWave OTA Validation Anechoic Chamber Interior on page 8

mmWave OTA Validation Anechoic Chamber Exterior on page 4

What You Need to Get Started on page 9

Software Overview

The mmWave OTA Validation Test Software comprises the following components for

interfacing and controlling the mmWave OTA Validation Anechoic Chamber and

instrumentation.

mmWave OTA Test Configuration UI

Use the mmWave OTA Test Configuration UI open-source LabVIEW graphical user interface

(GUI) to configure connection settings and measurement and sweeping parameters in the test

matrix file.

TestStand Template Startup Sequences

Use the installed TestStand template sequences to run the configuration files that you create

with the mmWave OTA Test Configuration UI. The template sequences control all aspects of

your OTA test and are open-source to enable customization of your test plan.

mmWave OTA Test Visualizer

Use the mmWave OTA Test Visualizer to complete offline analysis of the test data for antenna

measurements.

2| ni.com | mmWave OTA Validation Test Reference Architecture

mmWave OTA Test Positioner SFP

Use the mmWave OTA Test Positioner SFP 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:

Measurements • Effective isotropic radiated power (EIRP)

• Total radiated power (TRP)

• Error vector magnitude (EVM)

• Half power beamwidth (HPBW)

• Beam center

• Beam direction

• First null beamwidth

Visualizations • 1D cut analysis

• 1D polar plot

• 3D antenna pattern

• Heat map

• Best beam index

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.

mmWave OTA Validation Test Reference Architecture | © National Instruments | 3

Measurement Software

Use RFmx SpecAn and RFmx NR for compliant 3GPP 5G NR measurements and spectrum

measurements. You can also use the RFmx SpecAn SFP or RFmx NR SFP to control the

instrumentation.

Related Information

mmWave OTA Test Positioner SFP on page 25

RFmx Soft Front Panels on page 26

OTA Measurement Interface on page 33

mmWave OTA Test Visualizer on page 27

Antenna Plugin on page 33

Hardware Components

mmWave OTA Validation Anechoic Chamber Exterior

Top Bulkhead

Notice To avoid damage to chamber connectors, connect only cables that have the

correct connector type.

VHDCI

RJ45-1 USB2.0-1

VGA

RESET AM

E-STOPButton

USB3.0/2.0

RFfilter

ThermalT Type 1/2

1A 2A 1B 2B

4| ni.com | mmWave OTA Validation Test Reference Architecture

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

VHDCI

RJ45-1 USB2.0-1

VGA

RESET AM

E-STOPButton

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

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.

mmWave OTA Validation Test Reference Architecture | © National Instruments | 5

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

USB3.0/2.0

RF filter

Thermal T Type 1/2

1A 2A 1B 2B

USB3.0/2.0

RFfilter

ThermalT Type 1/2

1A 2A 1B 2B

VHDCI

RJ45-1 USB2.0-1

VGA

RESET AM

E-STOPButton

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.

6| ni.com | mmWave OTA Validation Test Reference Architecture

Table 3. Connector Descriptions (Continued)

Connector Connector Type Use

1A through 2A 2.4 mm Reserved for system calibration and DUTs

with >40 GHz inputs.

1B through 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 11

Operating the Chamber on page 10

mmWave OTA Validation Test Reference Architecture | © National Instruments | 7

mmWave OTA Validation Anechoic Chamber Interior

1 2

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 13

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.

8| ni.com | mmWave OTA Validation Test Reference Architecture

Step Task Where to Go

1 Verify external chamber and

instrument connections.

External Connections on page 11

2 Verify internal chamber cable

connections and attach antennas.

Internal Connections on page 13

3 Align the measurement and reference

antennas.

Aligning the Antennas on page 16

4 Calibrate the system. Performing System Calibration on page 18

5 Perform a full antenna pattern test. Getting Started with Step-by-Step Position

Sweeping on page 22

6 Perform a fast full antenna pattern

test.

Getting Started With Autonomous Position

Sweeping on page 23

What You Need to Get Started

The following items are required to operate the mmWave OTA Validation Test Reference

Architecture.

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.

Required Hardware Components

• mmWave OTA Validation Anechoic Chamber

– Laser Alignment Kit

– Dual-Polarized Measurement Antenna Fixture

– DRH50 Dual Ridge Horn Antenna Fixture

• mmWave OTA Validation Accessories Kit

– PXIe-6361 Multifunction I/O Module

– SHC68-C68-RDIO2 Digital Cable

– Dual-Polarized Measurement Antenna

– DRH50 Dual Ridge Horn Antenna

– 3 dB 2.4 mm attenuator (x4)

– 1.85 mm (m)-to-1.85 mm (m) cable, 8 in. (x4)

– 2.4 mm (m)-to-2.4 mm (m) cable, 48 in. (x2)

– 2.4 mm (m)-to-2.4 mm (m) flexible cable, 48 in. (x2)

– Ethernet cable

– SMA (m)-to-SMA (m) cable, 48 in. (x4)

– SMA (f)-to-2.4 mm (m) adapter

mmWave OTA Validation Test Reference Architecture | © National Instruments | 9

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

• A 0.9 N · m (8 lb · in.) calibrated torque wrench, 5/16 in. (NI part number 751120-01).

Required Software

You must install the following software to use the mmWave OTA Validation Test Reference

Architecture. NI recommends installing application software before installing the mmWave

OTA Validation Test Software.

• mmWave OTA Validation Test Software

• TestStand

• LabVIEW

• RFmx SpecAn

• RFmx NR

Note Refer to the mmWave OTA Validation Test Software Readme for more

information about compatible software versions.

Required Software for Instrumentation

The following instruments require specific drivers that are 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.

10 | ni.com | mmWave OTA Validation Test Reference Architecture

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