Cable required for dstv decoder to dish/aerial point in home

[Rouken Glen]

What is the name of the cable I need to connect a new HD DStv decoder to the aerial / dish point in home. The existing cable us not compatible with decoder. The dish is installed on roof of building.
Help!!

 

[ld13]

Since when is normal coaxial not enough?

 

[mbayshark]

What is the name of the cable I need to connect a new HD DStv decoder to the aerial / dish point in home. The existing cable us not compatible with decoder. The dish is installed on roof of building.
Help!!

Maybe uhmm pics of what you have.....