The Keysight M8041A is a high-performance J-BERT module engineered for receiver characterization and link validation across single and multi-lane high-speed digital interfaces. Operating within the M8020A BERT system architecture, it delivers pattern generation and error detection to 8.5 Gb/s and 16 Gb/s, supporting up to four 16 Gb/s BERT channels in a 3-slot AXIe chassis with expansion capability to 32 Gb/s via the M8061A multiplexer or M8062A front-end.
The module excels at jitter injection and characterization. It integrates calibrated sources for Random Jitter (RJ), Periodic Jitter (PJ1, PJ2), Spurious Jitter (SJ), Bursty Jitter (BUJ), sinusoidal interference in common-mode and differential-mode configurations, and Spread Spectrum Clocking (SSC) in triangular, arbitrary, and residual variants. An 8-tap de-emphasis stage (positive and negative) provides up to 20 dB of adjustment, while integrated and adjustable Intersymbol Interference (ISI) emulates channel loss effects.
Link training capabilities span PCI Express at 8 GT/s and 16 GT/s, SAS-3, and USB 3.0/3.1 protocols. The module supports interactive TxEQ training for IEEE 10GBASE-KR, 25GBASE-KR, and 100GBASE-KR4 applications. Built-in clock data recovery (CDR) and equalization streamline test configurations; analyzer equalization is available as an option (M8041A-0A3).
Technical Specifications
• Data Rates: 8.5 Gb/s and 16 Gb/s pattern generator and error detector
• BERT Channels: Up to four 16 Gb/s channels per 3-slot AXIe chassis; expandable to 32 Gb/s
• De-emphasis: 8-tap topology, ±polarity, up to 20 dB adjustment range
• Reference Clock Input: 0.2 to 1.4 Vpp amplitude; 10 MHz to 16.2 GHz (or 16.5 GHz) frequency; 50 Ω single-ended; SMA female connector
• Control I/O: Four universal control inputs with adjustable threshold; three universal control outputs with adjustable levels
– Key Features
• Jitter injection: RJ, PJ1/PJ2, SJ, BUJ, sinusoidal (CM/DM), SSC (triangular/arbitrary/residual)
• Adjustable ISI for loss emulation
• Interactive link training: PCIe, SAS-3, USB 3.0/3.1, and IEEE KR protocols
• Built-in CDR and equalization
– Typical Applications
• High-speed serial interface receiver characterization
• Protocol compliance and link training validation
• Jitter tolerance and channel loss testing
• Multi-lane device verification
– Compatibility & Integration
Designed for 3-slot AXIe chassis integration. Expansion to 32 Gb/s via M8061A multiplexer or M8062A BERT front-end.
