Agilent/Keysight 81500C – Optical Head Interface Module

The Keysight 81500C is an Optical Head Interface Module that bridges compatible optical heads to Keysight lightwave mainframes, enabling optical signal transfer and measurement data acquisition. This interface card functions as the critical connection point within modular optical test systems, translating optical signals from measurement heads into analog electrical data for mainframe processing and analysis. The module measures 12.4 inches long by 1.25 inches wide by 2.7 inches high and weighs approximately 1 lb.

Technical Specifications

• Length: 12.4 inches


• Width: 1.25 inches


• Height: 2.7 inches


• Weight: Approximately 1 lb


• Signal Output: Analog via BNC connector

Key Features

• Direct interface to 815xxA series optical heads for signal coupling


• BNC connector output for analog measurement signal transmission


• Slot-based integration into 8153, 8163, and 8164 series mainframes


• Compact form factor designed for multi-module mainframe configurations

Typical Applications

• Optical power measurement using compatible optical sensors


• Optical component characterization and test automation


• Integration into multi-parameter optical test benches

Compatibility & Integration The 81500C is designed exclusively for Keysight modular lightwave platforms. Compatible mainframes include 8153, 8163, and 8164 series units. The module interfaces with 815xxA optical head families, allowing measurement systems to scale across multiple optical parameters through slot-based expansion within a single mainframe chassis.