April 18, 2024 
Professional magazine and portal dedicated to electronics 
Tektronix introduced the industry's first 56 GBd 400G PAM4 optical probe for use with Tektronix DPO70000SX Series real-time oscilloscopes. Joining the award-winning 33 GHz DPO7OE1 introduced last year, the new 59 GHz DPO7OE2 single mode optical probe delivers the performance and advanced debug capabilities designers need to troubleshoot 400G PAM4 components and reduce time to market.
Compared to 100G with NRZ modulation, 400G with PAM4 signaling is far more complex and has substantially increased the time required for design validation, debug and troubleshooting cycles. Although Tektronix also offers 400G equivalent time (sampling) solutions, the migration from NRZ to PAM4 modulation presents a number of validation and debug challenges that only a real time oscilloscope-based solution is equipped to solve.
The DPO7OE2 can also be used for legacy NRZ applications. Analysis packages support standard optical measurements including ER, AOP, OMA, eye height and eye width, as well as PAM4 IEEE and OIF-CEI standard specific measurements including TDECQ.
