For GC3, (CCTV4,
CCTV9 and CCTV EF, theses three are always together, if you only see CCTV9 and CCTV EF you are not pointing GC3). after calculated your azimuth and elevation of your local area, be sure to apply the
magnetic deviation , otherwise you will never pointing it correctly.
Read the entire page of this link below to find out more
http://www.sadoun.com/Sat/Installati...Calculator.htm