Abstract: With the operation of character select keys, alphanumeric data stored in a ROM are successively read out and latched in a latch circuit under the control of a CPU. The call sign data of a received channel assembled in the latch circuit are stored together with the frequency data of that received channel in a RAM. The call sign data preset in this way is read out from the RAM by taking out the frequency data from the tuner and using it as address means and is visually displayed on a display unit while being informed of as voice by a voice synthesizer.