BIRD TECHNOLOGIES' 1000-WA-FFN-40 1000 W, 40 dB attenuator. The 1000-WA series attenuators are a valuable and reliable accessory for reducing power levels, for isolating components under test, for harmonic signal analysis, and as comparison standards. They are world renowned for their high-quailty, robust construction and conservative power ratings.brul liSelf-cooling design, needs no cooling plate./li liFully shielded against production of extraneous radiation./li liRugged construction./li liBroadband operation./li liOther attenuation values available upon request./li/ul