A network interface device has a safeguard apparatus. The safeguard apparatus is operable in power on, power off, and degraded power conditions. In power on operation, the safeguard apparatus maintains the quality of active and passive branch communications. During power off and degraded power operation, the safeguard apparatus safeguards the quality of the passive communication path.

The present disclosure relates to an image display apparatus. The image display apparatus according to one embodiment of the present disclosure comprises a plurality of input terminals; and a switching circuit including a first receiving end to receive a signal through a first input terminal among the plurality of input terminals, a second receiving end to receive a signal through a second input terminal among the plurality of input terminals, a first transmitting end to transmit a signal received through the first or the second receiving end to a signal processor, and a second transmitting end to output an output signal to the first input terminal in response to a cable being connected between the first and the second input terminal, and a signal being not received. Accordingly, it is possible to determine whether a cable connected to an input terminal is defective.

A MoCA splitter device may include an input port, a first output port and a second output port, a first transmission line configured to connect the input port to the first output port, a second transmission line configured to connect the input port to the first output port, a first isolation element configured to connect the first transmission line to the second transmission line, a second isolation element configured to connecting the first transmission line to the second transmission line. The first isolation element and the second isolation element are configured to provide an isolation level between the first output port and the second output port that is less than a predetermined isolation level of about less than 16 dB in a MoCA frequency band.

A coaxial tap in a hybrid fiber coaxial cable distribution system serves subscribers with an RF signal.

A cable television (CATV) entry adapter connects to a CATV network and serves as a hub in an In-Home Entertainment (IHE) network. IHE signals may be communicated between passive and active ports of an embodiment of the entry adapter through a pair of directional couplers which allow an IHE-enabled embedded multimedia terminal device (eMTA) at the passive port to communicate with multimedia devices of the IHE network connected to the active ports. An IHE frequency rejection filter is used in some embodiments to confine IHE signal to a single subscriber premise. In some embodiments a bidirectional IHE bandpass filter is used to enable IHE signals to pass between the passive and active ports of the CATV entry adapter.

A wideband RF choke circuit includes an input, first and second nodes, and a splitting means coupled between the input, first node, and second node. A first all-pass filter and a first line AC blocker are coupled between the input and the splitting means. Second and third all-pass filters, and second and third line AC blockers, are coupled between the splitting means and the first and second nodes, respectively. A first RF choke has a first end, coupled to the first all-pass filter, and a second end. A second RF choke has a first end, coupled to the second end of the first RF choke, and a second end coupled to the second all-pass filter. A third RF choke has a first end, coupled to the second end of the first RF choke, and a second end coupled to the third all-pass filter.

A wideband splitter includes an input port configured to receive an input signal; two or more output ports configured to output the input signal. The wideband splitter is capable of splitting the input signal and transmitting the split input signal to the output ports across a frequency band ranging from approximately 5 MHz to 3000 MHz.

A camera device includes a camera head that captures an observation image of a target site which is obtained by a surgical microscope, and a camera control unit that processes a signal of the observation video captured by the camera head. The camera head captures right and left observation images having a parallax from the surgical microscope to obtain a high-resolution observation video including right and left parallax videos for one screen, and the camera control unit cuts out the right parallax video and the left parallax video from the observation video including the right and left parallax videos to generate a high-resolution 3D video which is displayed on a monitor in 3D and with which stereoscopic observation can be performed.

A modular passive RF apparatus includes a passive RF portal and a passive RF expansion module configured to be removably coupled with the passive RF portal. A male connector is configured to extend from a top surface of the passive RF portal, and a female connector is configured to extend from the first end wall of the passive RF expansion portal. The female connector is configured to slidingly engage the male connector in a direction parallel to the top surface of the passive RF portal in order to mechanically couple the passive RF expansion module with the passive RF portal, and the male connector is configured to prevent the female connector from being removed from the male connector in a direction perpendicular to the top surface of the passive RF portal.

Power divider networks are provided that have Multimedia Over Coax Alliance (“MoCA”) bypass paths. These power divider networks may include a housing having an input port and first and second output ports; a first impedance transformer that has a first winding coupled in series between the input port and a first node, a second winding coupled in series between a reference voltage and the first node; a second impedance transformer that has a third winding coupled in series between the first node and the first output port, a fourth winding coupled in series between the first node and the second output port; a resistance having a first end coupled to the first output port and a second end coupled to the second output port; a first inductor in series between the third winding and the first output port; a second inductor in series between the fourth winding and the second output port; and a third inductor and a first capacitor that are disposed in parallel between the first output port and the first end of the first resistance.