while turning off the other electronic switches fig3 illustrates an example of tv signal reception using the multi directional antenna 2 or smart antenna having sixteen receiving directions in conformity to the eia 909 standard the sixteen receiving directions defined by the eia 909 standard are indicated by d 01 to d 16 respectively in fig3 the direction from which a tv signal on a channel comes is indicated as an example by a wide arrow with a channel number u201c ch 2 u201d u201c ch u201d is abbreviation of u201c channel u201d referring now to the flowchart shown in fig4 an automatic scanning process is described that is executed by the main controller 16 in the digital tv broadcast signal receiver 1 to determine a best receiving direction of the multi directional antenna 2 as shown in fig4 the main controller 16 starts the automatic scanning process when detecting the multi directional antenna 2 connected to the tuner 11 in response to selection of a channel s 1 the main controller 16 sets a counter at n 16 s 2 and outputs a control signal specifying the n th direction to the control unit 21 for the multi directional antenna 2 s 3 after a period of time required for changing the active receiving direction of the multi directional antenna 2 the main controller 16 instructs the tuner 11 to receive a tv signal on the selected.