The HP/Agilent 81560A Variable Optical Attenuator is a plug-in module for the Lightwave Multichannel platform that provides precision attenuation of optical signals across the C-, L-, and extended bands. Operating from 1200 nm to 1700 nm, it delivers 0 to 60 dB of attenuation with 0.001 dB resolution and ±0.1 dB accuracy. The module accepts up to +22 dBm input power and integrates an electronically controlled shutter for channel simulation and protection.
## Technical Specifications
• **Attenuation Range:** 0 to 60 dB
• **Resolution:** 0.001 dB
• **Accuracy:** ±0.1 dB
• **Repeatability:** ±0.01 dB
• **Wavelength Range:** 1200 nm to 1700 nm
• **Fiber Type:** 9/125 µm SMF28 Single Mode Fiber
• **Insertion Loss:** Typically ≤ 1.5 dB (excluding connectors)
• **Insertion Loss Flatness:** Typically ±0.1 dB (1420 nm < λ < 1615 nm)
• **Polarization Dependent Loss:** < 0.05 dBpp
• **Return Loss:** ≥ 50 dB
• **Maximum Input Power:** +22 dBm
• **Shutter Isolation:** Typically 100 dB
• **Settling Time:** Typically 100 ms
• **Warm-up Time:** 30 min
## Key Features
• Manual and remote control via GPIB, RS-232, or USB
• Integrated optical shutter for channel drop simulation
• Reference power functionality for normalized attenuation and power displays
• Automatic wavelength corrections applied on operator input
• Compact form factor: 75 mm × 32 mm × 335 mm (2.8" × 1.3" × 13.2")
• Operating temperature range: 10 °C to 45 °C
• Recommended recalibration interval: 2 years
## Typical Applications
• Optical power level control in single-wavelength test configurations
• Channel drop simulation in multichannel systems
• Signal attenuation for receiver saturation testing
• Telecommunications test and measurement
## Compatibility & Integration
Designed as a plug-in module for Agilent's Lightwave Multichannel platform (8163A/B, 8164A/B, 8166A/B). Connects via straight connector to host chassis.
