Advanced Fiber Solutions ATT110, ST Attenuator with 1-30db range

The AFS variable attenuators ATT-110, ATT-120, and ATT-130 are ideal for simulating cable loss for lab testing of link power margin or reducing power in links where receivers are being overloaded. These variable attenuators works on a gap-loss principle. Pulling the connector end-faces apart induces the loss. Since the light exits in an expanding cone, the receiving fiber will capture less light, as the gap gets larger. APPLICATION: Air gap attenuators are ideal for use with any LED systems and many laser systems. Some laser systems, especially high-speed digital links (over 1 GB/s) or analog CATV systems may not operate well with these attenuators due to back reflections. If you are using these attenuators in those types of systems, you should use the ATT-120 with a FC/APC connector, which have very low return loss even when unmated.