Tektronix BSX125 BERTScope Protocol-aware 12.5 Gb/s Bit Error Ratio Analyzer

The Tektronix BSX125 BERTScope is a protocol-aware Bit Error Ratio Analyzer designed for characterization and validation of high-speed digital communication systems up to 12.5 Gb/s. It delivers BER measurement capability to 1×10⁻¹² and supports interactive link training, FEC emulation, and patented Error Location Analysis™ for deterministic error identification across PCIe, SAS, USB3.1, and proprietary standards.

Technical Specifications

• Data Rate Range: 0.6 to 12.5 Gb/s (pattern generation and error analysis); up to 32 Gb/s for handshaking and DUT loopback


• Bit Error Rate Measurement: Up to 1×10⁻¹² BER


• Jitter Generation: 2.5 UI to 8.5 UI


• Input/Output Channels: 2 (1 transmit, 1 receive)


• Jitter Analysis: Integrated eye diagram with BER correlation, mask testing, jitter peak, BER contour, Q-factor analysis, and optional Jitter Map


• Spread Spectrum Clocking (SSC): Measurement of frequency deviation and modulation rate

Key Features

• Protocol-Aware Handshaking: Interactive link training and synchronization with DUT supporting PCIe and SAS adaptive training up to 32 Gb/s


• Forward Error Correction (FEC) Emulation: Pre- and post-correction BER measurement for Reed-Solomon FEC codes


• Error Location Analysis™: Patented correlation and deterministic pattern analysis for identifying error sources


• Multi-Chain Pattern Sequencing: Protocol-oriented and bit-oriented sequence generation with enhanced editor


• Optional 4-tap Tx Equalization: Supports interactive link training and adaptive equalization


• Stressed Signal Generation (STR): Integrated, calibrated stress option for signal margin testing


• Digital Pre-emphasis Processor (DPP125C): Calibrated pre-emphasis for 10GBASE-KR, PCIe, SAS 12 Gb/s, DisplayPort®, and USB 3.1

Compatibility & Integration

• Standards: PCIe Gen3 and Gen4, SAS, USB3.1, and emerging proprietary standards


• Software: Calibration and test automation available for key standards


• Accessories: Power cord, 3.5 mm receptacle adapter, optical mouse, mini USB keyboard