They provide adjustable attenuation to control power levels in receivers and analyzers without introducing distortion. We offer a robust portfolio of in-stock, adjustable RF attenuators and phase shifters for multiple applications, including test instrumentation, cellular communication, wireless communications, satellite communication and more. Or make. Our accurate variable optical attenuators have a great feature set: easy to use, high-end overall specifications and performance, interchangeable connectors, and external control capability. Perfect for preventing signal overload in audio interfaces and mixers. Commonly used in communication systems.