ML4079D 8 x 28 Gbaud PAM4 & NRZ | 400G Bit Error Rate Tester 8 x 28 GBd NRZ/PAM4 BERT | SSPRQ, PRBS13Q & PRBS31Q | FEC Estimation | TX and RX Equalizers |Signal SNR and Histogram With the accelerated growth of hyperscale datacenters, the performance demands on Ethernet network infrastructure is increasing exponentially, and customer expectations for high-speed data throughput is at an all-time high. As a result, Bit Error Rate Testers (BERT) have become a cornerstone for physical layer testing, from qualifying bit transmission for fiber optic and copper-wire digital data transmission lines to testing signal integrity. A BERT generates a sequence of bits through a communication channel and the received bits are then compared against the transmitted bits. A Bit Error Ratio (BER) evaluates the full end-to-end performance of a connectivity system and assures communication reliability. The ML4079D is an 8x28.5 GBd PAM4 & NRZ BERT that supports signal generation required for 400G measurements. It is ideally suited for the validation and production testing of systems, components, and Electro-Optical Modules. It supports the required test patterns defined by IEEE and OIF. Other features include signal-to-noise ratio (SNR) and histogram measurements, as well as transmitter and receiver equalizers.

ML4079D8 x 28 GBd BERT Introduction The ML4079D is a full feature 400G BERT that can be configured as an eight-channel PAM4 28 GBaud or eight-channel NRZ 28 Gbps lane. The receivers support FEC decoding (802.3bj KR4/scaled KP4) and will return the frame loss ratio for FEC scenarios and BER for unframed data. The receivers also show the eye's histogram and the channel's SNR over time. The transmitters support all standard test patterns mandated by IEEE and OIF such as PRBSQ13, SSPRQ, PRBSQ31, QPRBS13-CEI, etc. The user may also program the TX to output a user-defined pattern up to 32 kb long....

ThunderBERT GUI Using ThunderBERT GUI both accumulated and instantaneous BER measurements can be displayed and monitored simultaneously. Figure 3: Instantaneous and accumulated BER over time Block Diagram Figure 4: Block Diagram

multi Lane^ML4079D Option MSM The ML4079D Option MSM is a variant of the ML4079D with four M-SMPM front panel connectors instead of the individual 2.92 and 2.4 mm connectors for enhanced user experience. * Two monitor clocks are implemented to control channels 1 - 4 and channels 5 - 8 independently.

Mechanical DimensionsThe ML4079D is a 19-inch 2U instrument with 43.7 x 8.9 x 30 cmThe ML4079D Option MSM is a 19- inch 2U instrument with 22.45 x 8.84 x 30.33 cmOrdering Information Option