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.