The answer is as follows: First of all, tell you that the CIGNA 3 you are looking for is now called ZTE 6A. (1) Add a channel information of ZTE 6A program in your set-top box, including downlink frequency, symbol rate, polarization mode and PID code of audio and video. ② Connect the tuner and the set-top box. ③ Stop the set-top box at the channel added in ①, press the information key of the remote controller, and the LCD screen of the set-top box will display the word "P00". Turn the antenna eastward slowly until the number of "P00" changes, then adjust it to the maximum, and then press the antenna bracket.