The Agilent/Keysight 81533B Optical Head Interface Module bridges legacy optical sensors with current-generation mainframe systems. This single-channel interface module enables 815xx series optical heads to connect directly to 8153, 8163, and 8164 series mainframes, preserving investment in established optical measurement hardware while maintaining full compatibility with modern test architectures.
– Technical Specifications
• Channels: 1
• Dimensions: 12.4 in. length × 1.25 in. width × 2.7 in. height
• Weight: 0.6 kg (1.31 lbs) module; 1 kg (2.21 lbs) shipping
• Operating Temperature: 0 to 40°C, non-condensating
• Warm-up Time: 20 minutes
• Recalibration Interval: 2 years
– Key Features
• Single BNC analog signal output connector
• Compact form factor optimized for mainframe slot mounting
• Designed for long-term laboratory and industrial deployment
• No external power or auxiliary connections required
– Typical Applications
• Fiber optics power measurement and characterization
• Telecommunications system testing
• Research laboratory optical signal analysis
• Optical sensor integration in multi-instrument test setups
• Accurate optical power monitoring across extended wavelength ranges
– Compatibility & Integration
The 81533B interfaces the following optical heads with compatible mainframes:
• Optical Heads: 81520A, 81521B, 81524A, 81525A
• Mainframes: 8153, 8163, 8164
Direct mainframe slot installation eliminates external cabling, reducing measurement uncertainty and simplifying system configuration.



























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