Switchable highpass filter for CATV return path

A device for filtering a cable television (CATV) signal, the device comprising:

• an input port configured to receive downstream signals from a CATV headend and provide upstream signals thereto;
• an output port configured to be coupled to a subscriber device and provide the downstream signals thereto and to receive the upstream signals therefrom;
• a filter circuit configured to transmit the upstream and the downstream signals between the input port and the output port for a predetermined duration after the output port is coupled to the subscriber device;
• wherein the filter circuit is configured to block at least a portion of the upstream signals, at least a portion of the downstream signals, or both from being transmitted between the input port and the output port in response to an expiration of the predetermined duration;
• and
• at least one switch configured to actuate into a powered state when the output port is coupled to the subscriber device and to actuate into an unpowered state after the expiration of the predetermined duration, wherein the filter circuit is configured to transmit the upstream and downstream signals when the at least one switch is in the powered state, and wherein the filter circuit is configured to block the at least a portion of the upstream signals, the at least a portion of the downstream signals, or both in response to the at least one switch actuating into the unpowered state.

A device for filtering a cable television (CATV) signal, the device comprising:

• an input port configured to receive downstream signals from a CATV headend and to provide upstream signals thereto;
• an output port configured to be coupled to a subscriber device and provide the downstream signals thereto and to receive the upstream signals therefrom;
• an insulator configured to move from a first position to a second position in response to the output port being coupled to the subscriber device;
• a biasing mechanism configured to bias the insulator into the first position before the output port is coupled to the subscriber device, and wherein the insulator is configured overcome an opposing force exerted by the biasing mechanism and to move into the second position when the output port is coupled to the subscriber device;
• a trigger configured to actuate in response to the insulator moving from the first position to the second position;
• and
• a filter circuit configured to permit the upstream and downstream signals to be communicated between the input port and the output port for a predetermined duration, wherein the predetermined duration starts in response to the trigger being actuated, wherein the filter circuit is configured to block at least a portion of the upstream signals, at least a portion of the downstream signals, or both from being communicated between the input port and the output port after the predetermined duration.

A device for filtering a cable television (CATV) signal, the device comprising:

• an input port configured to receive downstream signals from a CATV headend and to provide upstream signals thereto;
• an output port configured to be coupled to a subscriber device and provide the downstream signals thereto and to receive the upstream signals therefrom;
• a trigger configured to actuate in response to the output port being coupled to the subscriber device;
• a filter circuit configured to permit the upstream and downstream signals to be communicated between the input port and the output port for a predetermined duration in response to the trigger being actuated, wherein the filter circuit is configured to block at least a portion of the upstream signals, at least a portion of the downstream signals, or both from being communicated between the input port and the output port after the predetermined duration, wherein the filter circuit comprises:
• a first filter configured to block the upstream signals, the downstream signals, or both that are outside a first frequency band;
• and
• a second filter configured to block the upstream signals, the downstream signals, or both that are outside a second frequency band that is different from the first frequency band;
• and
• at least one switch configured to actuate into a powered state when the output port is coupled to the subscriber device and to actuate into an unpowered state after the expiration of the predetermined duration, wherein the filter circuit is configured to route the upstream signals, the downstream signals, or bath to the first filter when the at least one switch is in the powered state, and wherein the filter circuit is configured to route the upstream signals, the downstream signals, or both to the second filter in response to the at least one switch actuating into the unpowered state.

A device for filtering a cable television (CATV) signal, the device comprising:

• a filter circuit configured to relay two-way CATV signals between a CATV network and a subscriber network during a predetermined duration, and block a portion of the two-way CATV signals from being relayed between the CATV network and the subscriber network after the predetermined duration;
• wherein the filter circuit is configured to actuate into a first state in response to the device being coupled to a subscriber device, and actuate into a second state after the predetermined duration;
• wherein the filter circuit is configured to relay the two-way CATV signals between the CATV network and the subscriber network when the filter circuit is in the first state, the two-way CATV signals that are configured to be relayed when the filter circuit is in the first state being in a first frequency band;
• and
• wherein the filter circuit is configured to block the portion of the two-way CATV signals from being relayed between the CATV network and the subscriber network when the filter circuit is in the second state, the two-way CATV signals that are configured to be relayed when the filter circuit is in the second state being in a second frequency band that is different from the first frequency band.