The Keysight M8020A J-BERT is a high-performance bit error ratio tester engineered for receiver characterization of single and multi-lane serial I/O devices. Operating from 8.5 Gb/s to 32 Gb/s, it delivers integrated jitter injection, equalization, and link training capabilities across 1 to 4 BERT channels. The system supports PCI Express, USB, SATA, SAS, and Ethernet standards with automated calibration and repeatable measurements for physical layer validation.
Technical Specifications
Data Rates
• 8.5 Gb/s baseline; 16 Gb/s via M8041A modules
• 32 Gb/s via M8062A front-end or M8061A multiplexer with N4877A CDR/de-multiplexer
Channel Configuration
• 1 to 4 BERT channels in 5-slot AXIe chassis
• Module options: M8041A, M8051A, M8062A
Jitter Injection
• Random Jitter (RJ), Periodic Jitter (PJ1, PJ2)
• Sinusoidal Jitter (SJ), Butterworth Jitter (BUJ), Clock/2 Jitter
• Spread Spectrum Clocking (SSC) — triangular, arbitrary, and residual
• Sinusoidal level interference (common and differential modes)
• 2-tone PJ and sRJ
Signal Conditioning
• Up to 8-tap de-emphasis with positive/negative settings
• Continuous Time Linear Equalizer (CTLE) with preset options
• Built-in clock recovery with adjustable loop bandwidth
• Integrated and adjustable Inter-Symbol Interference (ISI) for loss emulation
– Key Features
Link Training & Standards Support
• Interactive training for PCI Express (8 GT/s, 16 GT/s), USB 3.0/3.1, SATA/SAS, SAS-3
• 10GBASE-KR, 25GBASE-KR, 100GBASE-KR4 with TxEQ training
• Recovery state machine for device loopback configuration
Calibration & Measurement
• Automated in-situ calibration of signal conditions
• Repeatable BER measurements with integrated clock recovery
Interference Testing
• Common and differential-mode level interference injection
• Sinusoidal interference capability across both modes
– Typical Applications
Receiver compliance validation for high-speed serial links, jitter tolerance characterization, equalization optimization, and link training verification across multiple industry standards.
– Compatibility & Integration
Key component of the Keysight M8000 Series physical layer test ecosystem. De-emphasis negotiation via M8051A-0G4 or M8041A-0G4 options.
