Tektronix DPP125C Digital Pre-emphasis Processor

The Tektronix DPP125C Digital Pre-emphasis Processor compensates for signal degradation in high-speed digital communication systems by applying controllable pre-emphasis to enhance signal integrity. It corrects transmission channel impairments through configurable tap-based equalization, enabling accurate data recovery at the receiver and supporting compliance testing across multiple industry standards. The instrument operates as either a standalone device controlled remotely or integrates fully with a BERTScope for unified software control.

– Technical Specifications

• Data Rate: 1 to 12.5 Gb/s
• Pre-emphasis Configuration: 3-tap or optional 4-tap
• Supported Standards: 802.3ap, Serial Attached SCSI (SAS), 10GBASE-KR Backplanes, DisplayPort™, USB 3.0/3.1, PCI Express® Gen3
• Signal Adjustment: Pre-cursor or post-cursor compensation for inter-symbol interference (ISI) and signal loss mitigation
• Input Type: Single-ended data and clock inputs
• Control Methods: Direct tap weight entry, time-domain step response visualization, frequency-domain Bode plot analysis
• Optional ECM Features: Reference clock multiplication (2.5 GHz, 5 GHz, 8 GHz PCIe compliance), eye opener functionality, 12 Gb/s SAS clock doubler
• Interfaces: RS-232 for PCIe receiver equalization link training, USB for PC control
• Clock/Data Delay: Internally compensated for length-matched cables when integrated with BERTScope

– Key Features

• Adjustable tap weights for optimizing compensation across varying channel conditions
• Amplitude-weighted time-domain bitmap display for step response visualization
• Frequency-domain Bode plot for monitoring implemented equalization effects
• Compact footprint compatible with BERTScope stacking geometry
• Dual operation modes: standalone PC control or full BERTScope integration

– Typical Applications

• Design characterization for high-speed digital systems
• Certification testing of serial data streams against industry standards
• High-speed I/O component and system verification

– Compatibility & Integration

Operated standalone via remote PC or fully integrated with Tektronix BERTScope using BERTScopePC software and drivers.