RefRad X

Radio Frequency Engineering

RefRad X Comb Generator

The newly developed battery operated comb generator RefRad X is especially designed for checking the quality of radiated and conducted EMC and EMF tests. Initially introduced in the beginning of 2008, several modifications in the print design have enhanced the RefRad X considerably.

The RefRad X Comb Generator can be used to perform conducted measurements. When the antenna element is attached the device turns into the convenient, easy to use RefRad X Field Source for radiated system checks with no cables required. With the available FibreLink X an external synchronisation with the measurement receiver makes a small measuring bandwidth possible and improves the signal-to-noise ratio by up to 30dB. Thus it is a valuable tool for engineers to ensure the quality of EMC tests in the frequency range between 10 kHz up to 3 GHz and beyond.

A comb generator is built inside a conical antenna element. Therefore no cable between antenna and generator is necessary. This allows for repeatable measurement results and a reliable simulation of radiation performance. Three switchable frequency  settings are available: 10 kHz, 1 MHz and 5 MHz.

 

Field Source Applications

  • normalized site attenuation measurements in fully anechoic rooms (FAR)
  • system checks for test labs (radiated emission)
  • shielding measurements
  • investigation of table and mast influence
  • laboratory inter-comparison measurements
  • test site correlation measurements (same type)
  • correlation of alternative test methods

Comb Generator Applications

  • system checks for test labs (radiated emission)
  • system checks for test labs (conducted emission)
  • “pseudo” EUTs
  • cable loss calibrations
  • normalized site attenuation measurements (SAC)
  • normalized site attenuation measurements (FAR)
  • laboratory inter-comparison measurements
  • test site correlation measurements (same type)
  • correlation of alternative test methods
  • chamber factor measurements
  • investigation of table and mast influence

Fibre Link

  • synchronization of generator and receiver
  • REF-OUT of receiver is converted to optical signal and fed to RefRad X via fibre optic cable
  • Advantages:
    - 1 Hz RBW possible
    - Up to 30 dB more dynamic range compared to built in oscillator
    - Increased measurement accuracy due to better SNR