ML4039EN 4-Channel | 56 GBd PAM4 & NRZ | 400G BERT with ISI, JTOL & Crosstalk Noise injection| 4 x 56 GBd NRZ/PAM4 BERT | SSPRQ, PRBS13Q & PRBS31Q | 7-Tap PPG Linear Equalizers | Signal SNR, Histogram and Dynamic FFE | Programmable ISI Emulator to 9 dB | Shallow Loopback Testing | FEC 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 ML4039EN is a 4-channel, 56 GBd PAM4 & NRZ, 400G BERT with a unique crosstalk noise injection capability. It can be used in combination with ML407-PAM for jitter tolerance testing and has a programmable ISI emulator. Real hardware FEC testing is also possible with the versatile ML4039EN.

• SNR monitoring over time PAM4 slicer threshold adaptive Error-detection on following patterns: The ML4039EN is a full feature 400G BERT that can be configured as a four-channel PAM4 56 GBaud or four-channel NRZ 28/56 Gbps lanes. Also, half rates of 23 to 29 GBd are supported. The transmitters Support all standard test patterns mandated by IEEE and OIF such as PRBS13Q, SSPRQ, PRBS31Q, etc. It is also possible to program the TX to output a user-defined pattern. The ML4039EN is specifically designed to add crosstalk noise with configurable frequency up to 29.6 Gbps for NRZ and up to 29.6 GBaud...

Using ThunderBERT GUI both accumulated and instantaneous BER measurements can be monitored. Figure 3: BER curves using ThunderBERT GUI Figure 5: 1 dB ISI Channel Block Diagram Figure 4: ML4039EN Block Diagram Figure 8: 4 dB ISI Channel SI Channel Emulation The ML4039EN can programmatically emulate the effect of frequency-dependent attenuators with 1 dB up to 10 dB loss at the Nyquist frequency and a frequency roll-off similar to a PCB trace. When it comes to compliance testing on transceivers, more specifically for the stressed input test, this is highly practical. The effects of the different...

Jitter Tolerance Testing The following measurement captures on 26/53 GBd PAM4 show the effects of crosstalk and jitter injection on a clean pattern. Figure 11: Adding impairments to a 26/53 GBd signal using the ML407-PAM clock synthesizer Figure 12: JTOL Test Setup Figure 13: ML407-PAM Clock Jitter Synthesizer Noise Injection The ML4039EN enables noise injection feature to emulate real-life crosstalk scenarios along with shallow loopback testing. Noise implementation can be done in the form of a continuous interference, burst crosstalk, or single shot noise and can be configured on each channel...

Electrical Specifications Parameter Specifications PAM4: 23 - 29 GBaud and 46 - 58 GBaud NRZ: 23 - 29 Gbps and 46 - 58 Gbps TX Amplitude Differential 0 - 800 mVpp Square wave & user-defined pattern TX Amplitude Adjustment Steps of 2 mV De-Emphasis Resolution 1000 steps Equalizing Filter Spacing 1 UI Rise / Fall Time (20-80%) 12 ps / 14 ps Coding DFE Pre-coding and Gray coding supported Return Loss (16-25 GHz) < -15 dB Error Detector input TX/RX connectors 2.4 mm connectors (2.92 mm optional) Clock clock Output Monitor Clock Input Amplitude 750 mV single-ended Ambient Temperature 0-75 °C Power...

Mechanical Dimensions The ML4039EN is a benchtop instrument that fits in a 19-inch 2U rack. Two ML4039ENs arranged side by side take up one 2U slot in your rack. MultiLane also supplies the needed brackets. Option Description Total 3-year warranty with 3 annual Instruments Recommended Altemative Comments _Phase matched cable pairs Phase matched cable sets_ Please contact us at [email protected].