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An attenuator reduces the strength of a signal without distorting the waveform. Optical attenuators can be used to reduce the strength of optical signals such as those passing through a fiber optic cable and are frequently used in optical communications systems. RF attenuators are circuits that decrease a signal with little or no reflection. They are often employed in radio and communications applications.

The Agilent HP 8498A Attenuator has a frequency range of dc to 18 GHz. It has a maximum power of 500 W up to 5.8 GHz and a low SWR of 1.15 up to 8 GHz with a +/- 1 dB accuracy over the entire range. The HP 8498A is designed for RF and microwave frequency applications. Programmable attenuators such as the Agilent HP 8494H offer superior accuracy and reliability. The HP 8494H has a frequency range of dc to 18 GHz. Its maximum power is 100 W. The maximum SWR is 1.5 to 8 GHz, 1.6 to 12.4 GHz and 1.9 to 18 GHz. A 12 pin programming connector is included. There are also a variety of Agilent coaxial attenuators to choose from.

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