For example: Agilent E4440A or Anritsu 68369
Coaxial Fixed Attenuator, DC to 18 GHz
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Keysight / Agilent 8491C Overview
The Agilent 8491C coaxial fixed attenuator provides precision attenuation, flat frequency response, low SWR over broad frequency range at a low price. The attenuator is available in nominal attenuations of 3 dB and 6 dB, also 10 dB increments from 10 dB to 30 dB. This attenuator is swept-frequency tested to ensure they meet specifications at all frequencies. Calibration points are provided on a nameplate chart attached to each unit.
Features:
- Precision attenuation
- Flat frequency response
- Low SWR over broad frequency ranges at a low price