High-Speed Test Solution

High-Speed Test Capability

The 5G and AI era are coming. In the fields of automobiles, mobile phones, wearables, and industrial equipment, etc., 5G and AI technology application is more comprehensive and in-depth coverage. We offer high-speed test solution, such as PAM4.

PAM4 coding can double the data rate in the same frequency bandwidth. PAM4 has the advantage of high-speed transmission. The SNR of PAM4 must be nearly 11dB higher than NRZ to get the Sam BER. Therefore, the prediction of transmission line characteristics and circuit board layout skills has become essential.

CHPT has considerable expertise in PAM4 design and simulation to ensure high-speed transmission signal quality. In an extreme test environment, a fixed signal attenuation test of long range transmission lines is performed  to ensure the receiving performance. Only accurate simulation and PCB process capability can meet the test requirements.

Figure 1. PAM4 signal has four levels, and its transmission rate is twice that of traditional NRZ, but the height of each level is only one third of NRZ.

Figure 2. TDR graph displays impedance changes in the time domain. Using these results the signal is fine-tuned to stabilize the TDR characteristics impedance.