The Exfo FVA-80-B50-C22-IE is a dual-channel variable optical attenuator integrating singlemode and multimode functionality within a single portable unit. Each channel operates independently with dedicated optical interfaces, enabling precise attenuation control across multiple wavelengths and fiber types. The instrument delivers up to 65 dB maximum attenuation with 0.01 dB optical resolution and insertion loss below 3.0 dB, making it suitable for R&D, production testing, and field deployment.
## Technical Specifications
• Attenuation Range: 0 to 65 dB maximum
• Optical Resolution: 0.01 dB
• Insertion Loss: < 3.0 dB
• Singlemode Wavelengths: 1300 nm, 1550 nm (additional calibration wavelengths available)
• Multimode Wavelengths: 850 nm, 1300 nm (additional calibration wavelengths available)
• Return Loss: High performance design (specific values not documented)
• Optical Shutter: Attenuation exceeding 100 dB when activated
• Programmable Steps: Up to 60 attenuation values with user-defined step size
• Step Timing: Intervals up to 23 hours, 59 minutes, 59 seconds
## Key Features
• Dual independent singlemode/multimode channels in single housing
• Manual mode for direct attenuation control
• Program mode supporting automated test sequences
• Relative attenuation display modes with "X + B" reference configuration
• Step/Scan modes for dynamic attenuation adjustment
• Optical shutter with remote BNC control
• Rechargeable internal battery for field portability
• RS-232 and IEEE-488 remote interfaces
## Typical Applications
• Optical communication system testing and optimization
• Automated attenuator sequences in production environments
• Reference loss simulation and system characterization
• Field and laboratory measurements
## Compatibility & Integration
Remote operation via RS-232 and IEEE-488 interfaces supports integration into automated test systems. External shutter control available through rear-panel BNC connector.
