Yes, it can be attached to the cable that is coming into the house. However please keep in mind this antenna does not have amplifier, thus every splitter or extra connector between antenna and a TV can lower the signal level. I am using it (and having a good quality of the picture and 20 channels approximately) with 1 TV and 3 intermediate connectors between antenna and a TV:
1 - where antenna connected to the cable coming into the house.
2 - connector that connects incoming cable to the wall mount connector
3 - connector that connects wall mount outlet to the TV.