Radio telephone with channel switch

In a radio telephone unit including a channel switch for tuning the instrument to one radio channel of a certain number of given radio channels, where each radio channel has associated with it a discrete oscillator frequency, the unit further including a phase locked loop oscillator circuit containing a signal controllable frequency divider means having a plurality of control inputs and arranged to have a dividing ratio determined by the control inputs to which signals are being applied, the oscillator circuit producing oscillations at the discrete oscillator frequency of any selected channel, the improvement wherein said channel switch is constituted by a single pole switch having a plurality of fixed contacts and a movable contact disposed for connecting any one of said fixed contacts to a source of a fixed reference potential, and said unit further comprises a matrix circuit having a plurality of inputs each connected to a respective fixed contact of said switch, a plurality of outputs each connected to a respective control input of said frequency divider means, and interconnection means disposed between said inputs and outputs and permanently programmed before the first use of said unit for causing a respectively different signal pattern to appear at said outputs of said matrix circuit in response to each switching position of said channel switch.