The E4899A 40 Gb/s - 100 Gb/s Serial BERT enables research labs and standard bodies to test next generation ultra-high speed links designs. The E4899A 40 Gb/s - 100 Gb/s Serial BERT is based on Agilent ParBERT 81250 and the new high-speed E4898A 40 Gb/s - 100 Gb/s BERT Front-End. The E4899A stimulates the device with either PRBS or memory based patterns.