Redwood Analog Radio Tester

This multi-channel Analog Radio Tester provides FM-RDS, AM, RDS receiver and audio analyzer.


The multi-channel analog radio tester supports AM, FM-RDS, RDS analyzers, and audio analyzers. Simultaneously 3-TX channels can be transmitted and each TX channel can be set to AM or FM-RDS. FM-RDS provides many editable protocol parameters such as PS NAME, PID, radio text, etc. It also provides many functional tests such as AF (Alternative Frequency), TMC, EON, TIME, etc. The RDS analyzer receives signals over the air and displays RDS parameters. It is possible that the received RDS signal is recorded as a file, and this recorded file can be played back with the FM-RDS TX function. The audio analyzer shows the audio spectrum and audio waveform, and measures audio signal quality (SINAD, THDN and SNR) and frequency. The Audio Analyzer is very useful for automatically measuring RX sensitivity, by reducing the TX power of the 2100F TX signal and monitoring the radio (DUT) audio output with the Audio Analyzer.

Key Features


  • Support 3 independent RF channels with fully configurable RDS
  • Support various Audio Modes (MONO / STEREO / WAVE File/ SWEEP)
  • Support the latest radio text functions (RT, RT+, eRT, eRT+) with RDS code, UTF-8 and UCS-2
  • Support transmission a recorded RDS file
  • Automatic EON test function
  • User-configurable TMC (Trafic Message Control) function
  • Up to 10 AFs using method A/B


  • Support 3 independent RF channels
  • Support various Audio Mode (MONO/WAVE Music/Sweep)


  • Receive and analyze one FM-RDS radio signal Display RDS information such as PS_NAME, Radio Text (RT, RT+, eRT, eRT+), AF list, etc
  • Record the RDS data to the file

Audio Analyzer

  • SINAD, THDN, SNR and frequency measurement function
  • Waveform and spectrum display of audio signal

System Block Diagram:

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