Product Overview

The ML4079D is a full feature 400G BERT that can be configured as an eight-channel PAM4 29.5 GBaud or eight-channel NRZ 29.5 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.

The transmit power is adequate for testing up to 10 Km SMF links.

Key Features

Transmit:

• Data Rates in NRZ mode 9 – 14.3 and 22 – 29.5 Gbps

• Ability to tune the bit rate in steps of 100 kbps and find the RX PLL locking margin

• Data Rates in PAM4 mode 9 – 14.3 and 22 – 29.5 Gbps

• High frequency clock out > 2.4 GHz

• Independent control of inner eye levels

• Up to 1.2 Vppd output swing

• Supports Gray coding and polarity inversion

• 3-tap FIR Pre- and Post-emphasis up to 6dB

• Error injection

Available patterns are:

• PRBS 7/9/11/13/15/16/23/31/58 and their inverses

• PRBS13Q, PRBS31Q

• SSPRQ and SSPR

• Square wave, JP03A/B, CID JTOL pattern

Receive:

• Adaptive equalizer and channel IL estimator up to 14 dB (FFE+DFE)

• User-selectable CTLE 0 – 9 dB in 64 steps

• SNR monitoring over time

• Eye monitor

• PAM slicer threshold adjustable

Error-detection on following patterns:

• PRBS 7/9/11/13/15/16/23/31

• PRBS13Q and PRBS31Q

• Automatic pattern detection

• LOS indicators

• KR4/KP4 FEC emulator calculates the frame loss ratio, and returns BER with and without FEC

General:

• API libraries with documentation

• LabView driver and Python wrapper available