PAM-4 signaling is a very popular data format for high-speed communication links in datacenters. A clock recovery unit is needed for transmitter and receiver characterization. Many PAM-4 SERDES use retimers so the clock must be recovered from the data stream.
Keysight provides electrical and optical clock recovery solutions that operate with PAM-4 and NRZ signals up to 32 GBaud, the N1076A and N1077A.
New is that these clock recovery units can be controlled also from the M8070A system software for BER test solutions.
M8070A System Software with Clock Recovery
This simplifies accurate receiver characterization by automating jitter tolerance measurements using the M8040A high-performance BERT for PAM-4 and NRZ together with the clock recovery.