64-Gbaud PAM4 PPG, 32-Gbaud PAM4 ED provides better measurement solutions, supporting evaluation of devices for high-speed, large-capacity transmissions
Anritsu Corporation launched 64-Gbaud PAM4 Pulse Pattern Generator (PPG) and 32-Gbaud PAM4 Error Detector (ED) supporting 400GbE and Over 400G bit error rate tests.
To obtain a bit-error-rate test solution providing high signal level accuracy and Rx sensitivity for next generation broadband communication systems, these newly launched modules have been installed in the Anritsu Signal Quality Analyzer-R MP1900A series.
- The Signal Quality Analyzer-R MP1900A is a bit error rate tester for the over 400G market and supports generation of high-speed signals as well as analysis of signal performance.
- The newly developed PPG outputting PAM4 signals up to 64 Gbaud has Tr/Tf (20% to 80%) time of 8.5 ps (typ.) and Intrinsic Jitter of 170 fs (typ.).
- The multichannel function can be expanded up to 4 channels, and the Emphasis function corrects signals degraded by transmission path loss.
- The 32-Gbaud PAM4 ED module has a high sensitivity performance of 1623 mV (typ.) and supports installation of a clock recovery function required for Rx sensitivity evaluation, as well as PAM4 symbol error measurements.
Benefits of these modules
- Now with the help of Anritsu’s new PPG and ED, the right performance of 400GbE optical modules and devices can be tested with appropriate margin satisfying the specifications. Earlier evaluation of accuracy was difficult due to inadequate signal quality.
- The multichannel expandability matching instrument purchase budgets reduces measurement times using simultaneous measurement of multiple lanes.
Easy combination with jitter and noise addition functions to configure an all-in-one test solution for evaluating Rx sensitivity, helps improve development and testing efficiency
In the coming time, it is expected that the data traffic volumes will increase due to the adoption of next-generation 5G mobile communications and Cloud services. To meet this demand, infrastructure operators, such as data centers, are looking for increased speed, PAM4 and multilane communications methods.
400GbE speeds are being deployed using either the 26.5625-Gbaud PAM4 x 8 lanes or 53.125- Gbaud PAM4 x 4 lanes methods. When using the PAM4 method expressing data as four amplitude levels, the gap between signal levels is one-third that of the NRZ method, which reduces the unit time per symbol at higher baud rates, emphasizing the importance of signal quality in achieving high-speed transmissions. On the other hand, the inability to avoid degraded signal quality caused by crosstalk and noise resulting from use of multiple lanes and high-density circuit design increases the need for evaluation of minimum Rx sensitivity using stress-test signals.
Consequently, Anritsu has developed 64-Gbaud PAM4 PPG with better signal level quality and the 32-Gbaud PAM4 ED with excellent Rx sensitivity performance to support evaluation of equipment and devices for high-speed, large-capacity transmissions.
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