The JDSU VA4 is a manual variable optical attenuator for precision control of optical signal levels across a wide dynamic range. Sold as-is for parts or repair, this instrument serves users performing component harvesting, lab experimentation, or restoration work. The VA4 delivers attenuation control via front-panel adjustment with 0.1 dB resolution and maintains attenuation settings independent of power cycling—a key advantage over programmable alternatives.
Technical Specifications
• Attenuation Range: Up to 65 dB
• Resolution: 0.1 dB
• Calibration Wavelengths: 830 nm / 1300 nm or 1300 nm / 1550 nm
• Return Loss: Greater than 60 dB
• Insertion Loss: Low (values not detailed for as-is unit)
• Optical Technology: JDS Uniphase ultra-linear attenuator prism and microlens technology
– Key Features
• Manual attenuation control from front panel
• Large-scale LCD readout for attenuation level display
• 9V lithium battery power for portable, handheld operation
• Low Battery indicator alerts user when replacement required
• Attenuation level maintained through power cycles
• Rear panel-mounted connector bulkheads
• All major connector types supported; Universal Connector Adapter (UCA) available
• Compact, portable design
– Typical Applications
• Optical power control in test and measurement
• Receiver sensitivity testing
• Field system validation
• Power meter linearity verification
• Lab-based optical experimentation
• Component harvesting and repair
– Compatibility & Integration
The VA4 accepts all major optical connector types. Universal Connector Adapter accessories enable integration with non-standard interfaces. Dual calibration wavelength pairs (830/1300 nm or 1300/1550 nm) support multiband optical networks and legacy systems.
