The Keysight 81492A is a reference transmitter optical head that functions as a universal single-mode electro-optical converter for high-speed optical testing and measurement. It generates NRZ and PAM4 signals up to 56 Gbaud with excellent eye quality, supporting IEEE 802.3 compliance testing for 10, 40, 100, and 400GBASE standards. The module’s separated signal source and modulator architecture enables zero-chirp modulation, delivering repeatable and reproducible measurements that reduce production test margins and improve device specifications.
Technical Specifications
• Signal Types: NRZ and PAM4
• Maximum Baud Rate: 56 Gbaud
• Electro-Optical Bandwidth: 40 GHz typical at 1310 nm
• Rise/Fall Time: < 9 ps typical
• Jitter: < 400 ps RMS or < 6.5 ps peak-to-peak typical
• Transmitter Dispersion Eye Closure (NRZ): < 1.5 typical at 53.125 Gb/s, 1310 nm
• Transmitter Dispersion Eye Closure (PAM4): < 2.4 typical at 53.125 Gbaud, 1310 nm; < 2.1 typical at 53.125 Gbaud, 1550 nm
• Optical Wavelengths: 1310 nm and 1550 nm internal lasers with external tunable laser input and dual-wavelength switching capability
• Extinction Ratio: Wide range for maximum test coverage
– Key Features
• Zero-chirp modulation through separated signal source and modulator design
• Dual-wavelength operation with remote or manual switching between 1310 nm and 1550 nm
• Automated bias-point and power control when integrated into LMS mainframe
• Remote SCPI control and rapid test reconfiguration
• Front-panel active button for laser activation/deactivation
• Password-protected laser unlock functionality via mainframe
– Compatibility & Integration
• Integrates into Keysight LMS mainframe platform
• Compatible with Keysight Optical Receiver Stress Test solutions
• Full IEEE 802.3 stressed eye test compliance
• Laser sources comply with 21 CFR 1040.10 and WEEE Directive (2002/96/EC)
• Fast signal calibration and optimization through Keysight automation software
– Environmental
• Storage and Shipping Temperature: -40 °C to +70 °C
