APPARATUS FOR INSERTION OF LOCAL SIGNALS INTO A CATV OUTPUT

摘要

Apparatus for switching and combining based on external signaling is provided wherein a locally generated modulated carrier (or carriers) is inserted into a CATV system between the cable head end and video decoding/rendering device without requiring unused channels or the loss of any incoming services. An RF switch is controlled by a switch control processor based on knowledge of the video decoding/rendering device current tuning requirements to select between the full spectrum coming from the CATV system the locally generated and inserted channel. Current tuning requirements for the attached video decoding/rendering device may be input to the switch control processor from the video decoding/rendering device itself or from a separate device with knowledge of the current service requirements.