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USB test solution providers, vendors | USB conformance tests

This page mentions USB test solution providers or vendors. It mentions USB test equipments or software used for testing USB devices as per USB conformance tests.

Introduction: The USB interface is similar to RS232. It stands for Universal Serial Bus. It supports peer to peer communication between host and peripheral device. There are various versions of USB which include USB 2.0, USB 3.0, USB 3.1 Gen1/Gen2, USB 3.2 and USB 4.0. Following table mentions major features of various USB versions.

USB versions Features
USB 2.0 Data Rate : 480 Mbps
Power Output : 2.5W
USB 3.0 Data Rate : 4800 Mbps (i.e. 4.8 Gbps)
Power Output : 4.5W (Gen1)
USB 3.1 Gen1 Data Rate : 5 Gbps
Power Output : 4.5W (Gen1)
USB 3.1 Gen2 Data Rate : 10 Gbps
Power Output : 100W (Gen2)
USB 3.2 Data Rate : 5/10/20 Gbps
Power Output : Up to 100W
USB 4.0 Data Rate : 40 Gbps (Max.)
Power Output : Up to 100 Watts

USB Conformance tests

As mentioned, USB interface supports different data transfer speeds viz. Low speed, Full speed and High speed. Different tests are specified based on speed as mentioned in USB-IF electrical test specifications. Following are the USB transmitter and receiver tests. The figure depicts typical USB test setup used for testing USB DUT (Device Under Test).

Transmitter tests as mentioned below are conducted using high speed oscilloscope with wide bandwidth.
• Data rate test
• Eye Diagrams and Spectrum mask tests
• Rise and Fall time
• Monotonic data transitions over vertical openings
• Output voltage when either D+ or D- is driven high
• Output voltage when either D+ or D- is not being driven
• Differential output impedance

USB Test Setup

Receiver tests as mentioned below are conducted using compatible generator which can generate specific test signals into USB DUT (Device Under Test) with defined amplitudes as required.
• Data rate test
• Compliance as per different masks
• Reliably receive data in the presence of common mode (CM) voltage
• Implementation of transmission envelope detector (ED) with desired receiver tests

USB test solution vendors

Following table mentions popular USB test solution vendors.

Vendors Description
Eurofins Digital Testing The company helps to evaluate products against conformance specifications. It offers tools, test automation and test lab service for software and hardware under development. It offers USB Testing services.
Contact Website : eurofins-digitaltesting.com for more information.
Keysight Technologies Keysight Technologies develops test and measurement software applications and test equipments for wired and wireless standards. N5416A is a USB 2.0 compliance test software for Infiniium range of oscilloscope with 4 channel or 4+16 channels. It helps it very simple to perform USB signal integrity testing. Oscilloscope can be auto configured for each of the tests.
Website : keysight.com
GRANITE RIVER LABS INC. (GRL) GRL-USB-PD-C2 test platform supports conformance testing of USB type-C power delivery (PD) 3.0 and 2.0. It supports USB PD protocol analyzer as well as protocol sniffer modes. It can also be used as integrated PHY test controller for ThunderBolt 3, DisplayPort and HDMI Alt mode testing. It generates test reports in various formats (pdf, csv, xml) automatically.
Website : graniteriverlabs.com
Rohde & Schwarz R&S offers USB PD conformance testing in collaboration with its partner Granite River Labs. The test solution from R&S uses oscilloscopes (R&S® RTE or RTO) with GRL-USB-PD analysis software from Granite River Labs. The software controls test equipments and helps in performing electrical/protocol tests.
Website : rohde-schwarz.com
Tektronix, Inc. The company offers compliance and debugging solutions for USB 4.0, Thunderbolt 4.0 and DisplayPort 2.0.
Website : tek.com
BitifEye Germany The company develops AWGs, Oscilloscopes, BERTs and network analyzers. These test equipments hellp in performing PHY layer conformance tests for digital interfaces such as USB, PCIe, HDMI, MIPI, Thunderbolt etc. The products from BitifEye are compatible with equipments from Keysight Technologies and other manufacturers. Various USB versions such as USB 2.0, USB 3.0, USB 3.1 Gen1/Gen2/Type-C are supported by these test platforms.
Website : bitifeye.com

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