The Keysight N1077A is an optical/electrical clock recovery module that extracts timing signals from high-speed data streams across a 50 MBaud to 32 GBaud range. It integrates an amplified optical-to-electrical converter with a phase-locked loop circuit to lock onto incoming NRZ or PAM4 signals and generate a recovered clock output suitable for oscilloscope triggering and timing reference applications.
Technical Specifications
Data Rate Range
• 50 MBaud to 32 GBaud continuous tuning
• N1077A-216 option: up to 16 GBd
• N1077A-232 option: up to 32 GBd
Signal Support
• Non-Return-to-Zero (NRZ)
• Pulse Amplitude Modulation 4-level (PAM4)
Jitter Performance
• Ultra-low residual random jitter < 100 fs RMS
• Adjustable loop bandwidth with selectable peaking for standards compliance
Optical Interfaces
• Wavelength range: 830 nm to 1600 nm
• Single-mode and multimode fiber operation supported
• Optional integrated splitters: single-mode/multimode combination (N1077A-SMS), 70-30 multimode (N1077A-SMM), or 50-50 single-mode (N1077A-S50)
• External splitter option (N1077A-SXT)
Electrical Interfaces
• Single-ended and differential data inputs
• Electrical data output from optical input conversion
• Recovered clock output for oscilloscope clock/trigger input
• Auxiliary recovered clock output: 4 GHz to 8 GHz
– Key Features
• Phase-locked loop circuit with adjustable loop bandwidth and peaking
• In-band jitter appears on recovered clock; out-of-band jitter remains on data signal
• Optional Jitter Spectrum Analysis (JSA) capability for advanced characterization
• Compatible with external hardware equalizers for closed-eye measurements
• Phase noise analysis support for clock and data signals
– Typical Applications
• Eye diagram and jitter analysis on high-speed optical links
• Compliance testing and signal validation in fiber optic systems
• Serial digital communication characterization at multi-gigabit rates
• Bit error rate testing with synchronized clock recovery
– Compatibility & Integration
Works with Keysight oscilloscopes including the N1000A DCA-X, N1090A, and N1092/N1094-series DCA-M platforms, as well as Bit Error Rate Testers requiring external clock recovery.
