FEC is a key technology for assuring the quality of large-capacity transmissions, such as 100 and 400 GbE. Moreover, transmission technologies using 4- and 8-lane optical transceivers, such as QSFP, QSFPDD, and OSFP, as well as PAM4 modulation are being developed actively. Consequently, verification of transmission quality not only requires measurement of the original error rate before applying FEC, but also requires use of multilane FEC patterns defined by each standard to measure the error correction degree. The Signal Quality Analyzer R-series MP1900A is an all-in-one highperformance BERT for both generating multichannel FEC patterns such as 400GbE PAM4 signals and for measuring Jitter tolerance. It can generate defined RS-FEC patterns for 400, 200, 100, 50, and 25 GbE, and uses the DUT internal BER count data before and after FEC to support key error verification tests.
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