Circuit arrangement for performance check of mobile broadcast reception systems

摘要

The function testing circuit (2) is incorporated within the radio receiver (20). The circuit uses a frequency converter (3), receiving the oscillator signal (8) for the heterodyne receiver (1), and an IF carrier signal (32), for providing an HF output signal (12) corresponding to the reception frequency. The HF output signal, with a defined amplitude, is coupled to the reception antenna (5) of the radio receiver, and the reception strength is measured for verifying the function of the radio receiver.