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The Keysight 8491B coaxial fixed attenuator provides precise attenuation, flat frequency response, and low SWR over broad frequency ranges. The attenuator is available in nominal attenuations of 3 dB and 6 dB, as well as 10 dB increments from 10 dB to 60 dB. It has type-N connectors with a maximum frequency of 18 GHz. This swept-frequency tested attenuator ensures specification compliance at all frequencies. A nameplate chart attached to each unit lists calibration points
DC to 12.4 GHz: ±0.3 dB
12.4 to 18 GHz: ±0.3 dB