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Full band attenuators are waveguide based attenuators of four types: fixed, level setting, direct reading and programmable. Fixed and level setting attenuators are constructed with an E-plane resistive insert in the rectangular waveguide. The insertion loss of these attenuators is dependent on the frequency. The standard attenuation values for fixed attenuators are 3, 6, 10, 20 and 30 dB, and the attenuation range of level setting attenuators is adjustable from 0 to 30 dB via a micrometer. Fixed and level setting attenuators are typically used for signal attenuation when accuracy is not a focus.