See photos below for actual equipment. Spectral flatness The Exfo FVA-3100-BW option offers high spectral uniformity, allowing you to maintain an attenuation value within ± 0.1 dB throughout the WDM spectrum when characterizing EDFAs or subsystems. High-quality components and meticulous calibration procedures make the Exfo FVA-3100 Variable Attenuator the instrument of choice for repeatable and accurate attenuation settings (up to 100 dB). The Exfo FVA-3100 meets system and component manufacturers need for accurate EDFA characterization, component and system loss simulation, instrument calibration, power meter linearity measurement and spectral tuning. Its ultra-low insertion loss of 1.5 dB enables you to optimize the loss budget. The Exfo FVA-3100 is configured for singlemode or multimode fibers. Use it as a stand-alone instrument or mounted on a 19-inch rack (optional). Easy to use Access most functions at the touch of a button and manually change attenuation with the Exfo FVA-3100's user-defined steps or on-display value editing. The standard GPIB and RS-232 interface and control codes enable remote operation from a PC or test station. Program your own software solutions for complex test procedures and benefit from added computer capabilities. LabViEW® drivers are available. Features •Singlemode from 1200 to 1650nm •Spectral resolution of 0.1 nm •Typical insertion loss of < 1.5 dB •First-class repeatability •Excellent spectral uniformity •Optional monitor output •Fiber: 9/125 um •Wavelength range: 1200 - 1650nm •Attenuation: >75 @ 1200 - 1400nm >70 @ 1400 - 1650nm •Insertion Loss: 1.5dB typical, 1.8dB max. •Return Loss: > 50dB The Exfo FVA-3100 Variable Attenuator is the instrument that allows you to perform several attenuation related tasks. The Exfo FVA-3100 Variable Attenuator is configured for singlemode and multimode fibers. It is built to offer a high spectral uniformity, an important feature which allows you to maintain the attenuation value throughout the entire WDM spectrum. Its low insertion loss allows you to minimize your loss budget. The Exfo FVA-3100 Variable Attenuator has a program function, which allows you to create custom programs such as automatic attenuation scan. The variable attenuator has the versatility of three display modes: •Absolute, which includes the insertion loss. •Reference, in reference to the 0.001 dB level. •Offset, relative display to any selected reference value.