PURPOSE: To operate lots of station numbers with a few operating switches by giving more than two significances to one TV channel selection switch.

CONSTITUTION: A tuning voltage generating circuit 10 gives a tuning voltage to an electronic tuner 1. A storage circuit 12 stores the tuning voltage. A keyboard means 13B designates an address of the storage circuit 12. A microcomputer 11 receives an address command from the keyboard means 13B, decodes it, reads a tuning voltage value from the corresponding address of the storage circuit 12, transmits it to a tuning voltage generating circuit 10, a tuning voltage is given to an electronic tuner 1 through the said tuning voltage generating circuit 10 so as to attain a series of key input discriminating jobs receiving a required channel, a storage circuit control job and a tuning voltage control job. Then two ways of significances are given to one switch depending on the time length of the conductive time of the keyboard means 13B, the microcomputer 11 discriminates the difference so as to change the operation of the jobs.