ML4079EN 8 Channel | 61 GBd PAM4 & NRZ | 800G BERT | IEEE802.3ck Stress Testing Features | Real HW FEC 8 x 61 GBd NRZ/PAM4 BERT | SSPRQ, PRBS13Q & PRBS31Q | TX and RX Equalizers | Real FEC analysis| Jitter and Random Noise injection | Shallow Loopback Testing | Real HW FEC The move to 8x112 Gbps/lane has brought previously marginal aspect of testing to the fore. The 800G generation sees devices that are more sensitive to signal disruption in the form of jitter and noise than ever before. Stress testing device resilience to jitter and noise to glean an understanding not only of failure points, but the degree to which they can withstand increased disruptions is becoming an increasingly integral part of the testing process. The ML4079EN is an 800G BERT tailored to meet these new considerations. This BERT supports 8x100 Gbps fiber technology, real hardware FEC encoding/decoding with idle ethernet traffic, signal to noise ratio (SNR) and histogram measurements, also allowing users to implement flexible transmitter and receiver equalization. Crucially, the ML4079EN also features a suite of jitter and noise injection capabilities not only ensuring designs can pass the performance specifications outlined in IEEE802.3-2018 but highlighting how much these specifications can be exceeded; an ideal solution for stringent Engineering Validation Test (EVT) and Design Validation Test (DVT) cycles. The ML4079EN runs on the flagship Multilane ThunderBERT GUI, providing a comprehensive picture of every aspect of DUT performance.

ML4079EN8 x 61 GBaud PAM4 BERT Introduction The ML4079EN is a fully featured 800G BERT that can be configured for eight channels of 18.5-29 and 37-61 G PAM4 or NRZ. The transmitters support all standard test patterns mandated by IEEE802.3ck stress testing and OIF such as PRBS13Q, SSPRQ, PRBS31Q, etc. Tx can also be programed to output a user-defined pattern. The ML4079EN supports transmitter and receiver equalization to overcome signal integrity i mpairments due to channel losses or reflections. The ML4079EN supports Real Hardware FEC, with the following FEC modes: Once the FEC is enabled, the...

multi Lane^Receive • SNR monitoring over time • Error-detection on following patterns: • Automatic pattern detection • DFE: Decision Feedback Equalizer • MPICAN: Multipath Interference Canceller • LabView driver and Python wrapper available. • Shallow Loopback testing • API libraries with documentation. • Testing of copper and fiber-optic transmission lines • Functional and SI testing of transceivers • Characterization and Stress testing of LPO • Receiver stress testing of hosts and pluggable (jitter & interference) Using ThunderBERT GUI, both instant and accumulated BER, FEC and SER measurements...

multi Lane^Jitter Tolerance - JTOL Capabilities When using high-speed signals, it is imperative to take into consideration the effect of jitter components coming from different sources and affecting the signal quality. For this reason, jitter tolerance is no longer an option but a hard requirement to characterize the DUTs. Applied sinusoidal jitter peak-to-peak amplitude (UI) (log scale) Figure 52-4—Mask of the sinusoidal component of jitter tolerance (informative) Table 162-16—Receiver jitter tolerance parameters Figure 5: IEEE Standard 802.3ck Stress Testing Jitter Injection Capabilities: •...

IEEE Automated JTOL • IEEE Standard based on selected line rate • JTOL Testing on all the required IEEE Frequencies at different amplitudes • JTOL Result and Margin Testing based on selected Target BER and BER Time • Single Frequency Selection from 1KHz to 20MHz • Pass/Fail Verdict based on Selected BER

Interference Tolerance - ITOL Capabilities The ML4079EN enables a noise injection feature to emulate real-life crosstalk scenarios along with shallow loopback testing. Noise implementation can take the form of a continuous interference, burst crosstalk, or single shot noise and can be configured on each channel independently. The shallow loopback function works with a variety of traffic types including unframed PRBS, framed Ethernet and FEC traffic. In addition, the ML4079EN follows the specifications of the IEEE Std 802.3-2018, IEEE Standard for Ethernet SECTION SIX, and Annex 93C stating that...

Shallow Loopback mode Noise Effect on Eye Figure 15 depicts a ML4079EN accepting traffic from an external 800GE switch, looping the traffic internally and re-transmitting it back to the RX side of the host. This can be used to test the robustness of the host port, by adding an increasing amount of crosstalk noise and understanding where the receiver starts producing errors. Figure 14: Eye Diagram before and after noise injection – PAM4 modulation Figure 15: Shallow Loopback Using ML4079EN and 800G Switch

RLM Stress Test: Inner/Outer Eye Control on PAM4 Mode: ML4079EN supports a full Inner and Outer Eye Control Range using the ThunderBERT GUI. This feature enables the robustness testing of the transmitted signal by changing the Inner/Outer Eye settings and measuring the Level separation mismatch ratio RLM. The obtained value is compared to the IEEE 802.3 Transmitter Characteristics Value for Compliance Evaluation. Figure 16 illustrates different Inner/Outer Eye settings using the ML4079EN. Figure 16: Inner/Outer Eye Control Using ML4079EN

Specifications Parameter

Mechanical Dimensions The ML4079EN is a benchtop instrument that fits in a 19-inch 2U rack. Two ML4079ENs arranged side by side take up one 2U slot in a rack. MultiLane also supplies the needed brackets. Ordering Information Option ML4079EN Description 800G BERT (8 CH 56 GBd PAM4) with crosstalk noise injection Real Hardware FEC analysis Stressed Input Tolerance: Jitter & Interference Tolerance capabilities, Margin Test Single calibration Recommended accessory: 4x TM40-0334-01: Core HC2, 2.5 mm 8 channel to 2.4 mm male connector, 10 inch length Total 3-year warranty with 3 annual calibrations...