CT100 cable is the generic term for high quality digital certified coaxial cable.

CT100 cable is actually a single makers model code but its whats been adopted as what to call 75ohm copper shield and braid, hollow conductor coax.

RG6 (and for that matter RG59), whilst being similar spec is NOT the same thing. RG cable is for CATV.

Sky for instance will ONLY entertain certified CT62 (Shotgun 100 2 cables paired on one reel), CT100, CT125 and CT162 (Longer runs=thicker cable) for Digital Sat TV.

Unless you are going a long way I would stick to CT100 coaxial as its a fair price point, espcially on 250m+ drums.