1. In electrical systems, a
network that reduces the amplitude of a
signal without appreciably distorting its
waveform. Note 1: Electrical attenuators are usually passive devices. Note 2: The degree of
attenuation may be fixed, continuously adjustable, or incrementally adjustable. Fixed attenuators are often called pads, especially in
telephony. Note 3: The
input and
output impedances of an attenuator are usually matched to the impedances of the signal source and
load, respectively. 2. In optical systems, a device that reduces the amplitude of a signal without appreciably distorting its waveform. Note 1: Optical attenuators are usually passive devices. Note 2: The degree of attenuation may be fixed, continuously adjustable, or incrementally adjustable.
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