You can download a starry sky guide to calculate the local reception angle. There should be no shelter in front of the pot. Connect the line and press the information key, and the signal strength and signal quality columns will appear. (After the line is connected, the signal strength is about 50 ~ 70. ) first adjust the elevation angle, adjust the signal intensity to the highest, and then adjust the azimuth. In China, Secondary Nine is generally about 30 degrees southwest. Turn the turntable slowly from south to west, and the signal quality will appear and be adjusted to the highest. Finally, you can turn the tuner slightly and turn the signal to the highest level to see if all the radio stations are turned off.