Passmark USB-C 20G Loopback Connector

Error detection

Detect and diagnose USB port problems by identifying data transmission errors during testing.

The loopback test verifies that the data sent by the host is returned exactly, thus ensuring complete data integrity.

All errors are logged, including the number and type of error, which allows for the targeted identification of unreliable or faulty USB ports.

Reliability and burn-in tests

Perform extended stress tests by subjecting the USB port to a continuous data transfer load.

This allows for the evaluation of long-term stability and the detection of sporadic or temperature-related errors that may not occur during short tests.

Ideal for burn-in tests and for validating system reliability under continuous load.

Port profiling

Analyze the full capabilities of a USB port using USB Power Delivery (PD) communication.

The device can read the advertised performance profiles, including supported voltages, current limits, and maximum available power.

Furthermore, specific voltage levels can be triggered (up to 48 V with EPR), enabling comprehensive testing across all supported power modes.

Cable detection  

Retrieve detailed information about connected USB-C cables via the USB Power Delivery protocol.

This includes identification data, supported data transfer rates, and available performance characteristics. This ensures that the cables used are suitable for high-speed data transmissions and high-power applications.

Software, API automation & Firmware updates

PC software

The USB-C 20G loopback comes with a dedicated Windows application for controlling the device and performing all types of tests. The software offers an intuitive user interface for configuring tests, selecting speeds and voltages, and viewing results. Outputs can be displayed as logs or graphs and saved for further analysis.

API support for automation

An API is available for communication between the device and external software. This allows users to create custom scripts and automate test sequences. This is particularly helpful for integration into production lines or extensive validation and testing environments.

Updatable firmware

The device supports firmware updates to provide continuous improvements and enhancements. This ensures compatibility with future USB standards while allowing for the addition of new features and optimizations.
This helps to protect the long-term investment in the test platform.

Application areas  

Manufacturing & Quality Assurance: High-volume testing of USB connectors in production environments to ensure consistently high quality.

Compliance testing: Verification of compliance with USB specifications, including data transfer speed, power supply, and compatibility.

IT diagnostics & repair: Rapid assessment of the condition and performance of USB ports as part of maintenance and repair work.

Device connections 

Test Unit Port:
This USB-C connector is connected to the USB port being tested. Once connected, the test unit is powered via the USB port and the USB 20Gbps Loopback Plug starts automatically.

External Load Port:
Allows an additional load to be applied to the USB cable for testing under real-world operating conditions. Ideal for simulating various power supply scenarios. The connector features integrated overcurrent protection and can be controlled via software. The Nano-Fit load cable is available separately and is not included.

Debug port:
Optional connection for a stable power supply or for connecting a second system for logging and diagnostic purposes. It enables independent operation of the device, allowing diagnostics to be performed even with faulty or unstable test ports. Furthermore, it improves the reliability of cable detection by eliminating power-on delays.

Preliminary overvoltage check with the USB-C SOS  

Protect your USB-C loopback connector by pre-testing potentially faulty USB-C ports for overvoltage using the PASSMARK USB-C SOS short circuit tester. This robust and easy-to-use test plug provides a visual indication of the applied port voltage within seconds, protecting your USB-C loopback connector from potential damage. This is especially beneficial during testing in production environments.

If the USB-C SOS pre-test is successful, you can then proceed with a more comprehensive fault diagnosis using the USB-C 20G loopback connector and the associated software.