RUNDFUNKEMPFAENGER MIT DIGITALER FREQUENZEINGABE

摘要

A digital tuner for a radio in the medium frequency range includes a microprocessor and a keyboard. All frequencies are three digit numbers and are whole number multiples of nine. The desired three digit frequency is input to the microprocessor by manually entering the first two digits using the keyboard If, the third digit is ambiguous it must be inputted manually. The operator is made aware of the ambiguity by the flashing of an indicator where the digit is to be displayed.