同軸電纜線75ohm?50ohm?

http://cablesondemandblog.com/wordpress1/2014/03/06/whats-the-difference-between-50-ohm-and-75-ohm-coaxial-cable/

簡單的說,50ohm: high power handling capacity, i.e. 100 watts or more

75ohm: ensure that the signal gets through the cable in the most efficient way possible, losing very little signal strength in the process