The Series 625-03 Ethernet range of High Precision Programmable Attenuators utilise the proven rotary vane principle and Flann’s “Industry Standard” experience to offer very high performance at a competitive price.

This model is based on Flann’s highly respected Series 620/621 Rotary Attenuators, which offer high accuracy and high repeatability over the full attenuation range. In addition to the microwave performance expected of Flann, the Series 625-03 offers Ethernet control enabling connectivity from anywhere worldwide. The integrated touch screen display enables full manual operation where an Ethernet connection may not be available.

Repositioning time between 0 and 60 dB is less than one second.
Additional functionality features enable the instrument to be driven to higher attenuation values up to 90 dB.

Please note: The traditional CP2021 Control Processor is not required to drive the instrument.


  • Ethernet Control Motorised Operation
  •  +24 V DC Operating Voltage – mains
    adaptor is supplied
  • Models from 6.58 to 500 GHz
    (WG15, WR112 to WM570, WR2.2)
  • Full Waveguide Band Operation
  • 0 to 60 dB Attenuation Range
  • Attenuation Accuracy <0.1 dB or 1%
    (whichever is greater)
  • 0 to 60 dB Cycle Speed <1 second


  •  Automated Test Equipment (ATE)
  • Testing millimetre-wave Point to Point Radios
  • Bit error rate testing
  •  Fade margin testing
  • Transceiver diversity