Abstract: A broadcast receiver comprises a mixer to which an aerial signal and an oscillator signal are applied for generating an intermediate-frequency signal. The oscillator signal is produced by a generator and its frequency is determined by a tuning value which is applied to the generator. In addition, the receiver comprises a number of (N) preselection keys to each of which a predetermined fixed tuning value is assigned, so that by operating such a key that relevant tuning value is directly applied to the generator. Assigning a tuning value to a preselection key is effected by a micro-computer. This micro-computer produces a fixed sequence of auxiliary tuning values which are sequentially applied to the generator. The intermediate-frequency signal obtained in response to each auxiliary tuning value is converted into a test value in a conversion circuit. These test values are compared to reference values from a fixed sequence of decreasing reference values.