Butler Group Communications Cellular & Microwave Radio Networks Radio Accessories Flann Rugged Rotray Field Useable Attenuator

Flann Rugged Rotray Field Useable Attenuator


  • Direct Reading
  • Splash-Proof
  • Continuously Variable
  • 0.5 dB Accuracy up to 50 dB
  • Optional Transportation Case
  • Flann's Rugged Rotary Attenuators - Series 113 have been developed in response to the specific requirements of major UK and European communication companies, operating national point-to-point Microwave Radio Networks, for Fade Margin and Bit Error Rate (BER) measurements in a field test environment.
  • Models in the range utilise many of the components from the precision rotary vane Attenuators.
  • Each instrument features a direct reading scale calibrated in 1dB increments from 0 to 50dB.
  • The attenuation accuracy is 0.5dB over the full waveguide frequency band.
  • Models with an extended attenuation range up to 60dB are available to special order.
  • Reliability in a field test environment is enhanced by the splash-proof design.
  • Two expandable securing straps allow hands-free attenuator operation in difficult situations.
  • The units are optionally available housed in a fitted rugged aluminium transportation case.
  • The Attenuators can be supplied fitted with ancillary pieces of test equipment to suit specific applications.
  • In some instances these can be accommodated within the transportation case. For example ancillary components could include flexible waveguides, waveguide to coaxial adaptors or fixed attenuators for an extended attenuation range.


  • Attenuation Range 0 to 50dB
  • (optionally 60 dB)
  • (continuously variable)
  • Attenuation Accuracy 0.5dB
  • VSWR (better than)1.15:1

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