Because the medium and large receivers are comparatively expensive and most families cannot install them for themselves, they are usually installed by communities or programs are relayed through cable.
由於中、大耳朵的費用較昂貴，一般家庭較少自行裝設，通常是由社區共同裝置，或是有線電視台接收後，再用線纜轉送給家庭用戶。