The SK-8860 8 Audio/Video Input and 1 RF output TV Modulator is a cost-saving RF agile modulator for hotel cable TV system. It has 8 Audio/Video input and only one RF combiner output.
The 4in1 fixed but skip channel modulator -- The SK-4860FM analog modulator has 4 audio/video input and output as one. It's fixed but skip channle one,which is specially designed for small hotel cable system.