USB4 Receiver Calibration and Test to USB-IF standards

A single USB Type C port handles multiple data communication protocols at once, including USB4. All products using the standard need USB-IF authorized compliance testing for USB4 certification, which tells consumers their USB C products will work together seamlessly. The USB4 standard increases the bit rate of the prior generation to 40 Gbps. The increased bit rates introduce potential for receiver errors, so testing USB4 devices is more challenging than in prior generations.

Receiver compliance testing begins with calibration. First, the transmitter equalizer requires optimization. Second, the user must finely calibrate the Bit Error Rate Tester's (BERT) stress signal using a high-performance oscilloscope to achieve accurate stress conditions. During the receiver test, the BERT injects the stress signal on the lane under test and then performs the BER test. This test uses an external USB4 microcontroller test module and the USB4 Electrical Test Tool software to ensure that the BER does not exceed the allowance defined by the USB compliance test specification.

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Automated USB4 Receiver Compliance Test Solution

Automated USB4 receiver compliance test solution simplifies the time-consuming and error-prone process of configuring and testing a USB4 device to the USB-IF standard. The solution comprises the USB4 receiver test software running on a PC, an M8040A high-performance BERT, a UXR-Series high-performance oscilloscope, and additional signal integrity software for the oscilloscope.

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