A signal processing system includes a signal processing device including a processor and a memory device storing first information and a signal transmitting device including a memory device storing second information. The processor reads the memory devices to obtain the first information and the second information, determines a threshold date according to a first date indicated by the first information and a margin, and determines whether a second date indicated by the second information is earlier than the threshold date. When the second date is earlier than the threshold date, the processor controls the signal processing device to operate in a limited mode. In the limited mode, the signal processing device does not output any signal to the signal transmitting device or ignores any signal from the signal transmitting device, or the signal processing device only outputs a limited signal to the signal transmitting device.

A signal processing system includes a signal processing device including a processor and a memory device storing first information and a signal transmitting device including a memory device storing second information. The processor reads the memory devices to obtain the first information and the second information, determines a threshold date according to a first date indicated by the first information and a margin, and determines whether a second date indicated by the second information is earlier than the threshold date. When the second date is earlier than the threshold date, the processor controls the signal processing device to operate in a limited mode. In the limited mode, the signal processing device does not output any signal to the signal transmitting device or ignores any signal from the signal transmitting device, or the signal processing device only outputs a limited signal to the signal transmitting device.

Disclosed is a signal processing circuit, a contactless connector, a signal processing method and a storage medium. One end of a cable of the signal processing circuit can be connected to a device and the other end of the cable of the signal processing circuit is connected to a port processing unit for receiving a signal transmitted by the device and/or transmitting a signal to the device; one end of the port processing unit is connected to the cable, and the other end of the port processing unit is connected to a signal processing unit for acquiring a data communication transmission mode of a port of the device connected to a connector, and performing interface configuration on the cable according to the data communication transmission mode; and the signal processing unit is connected to the main coil or the secondary coil, and is configured to, if receiving the signal transmitted by the device, transmit the signal to the main coil and/or the secondary coil, and/or is configured to, if receiving the signal transmitted by the main coil and/or the secondary coil, transmit the signal to the device according to the data communication transmission mode. According to the present application, the contactless connector adapts to different transmission protocols of the device port while remote wireless signal transmission is realized.

A communication system according to an embodiment of the present disclosure is a communication system that transmits a signal from a plurality of transmission devices to one reception device via a transmission path. In the communication system, the transmission path includes a branch point at a midpoint, includes a plurality of first signal lines that couples the transmission devices and the branch point to each other, and further includes a second signal line that couples the branch point and the reception device to each other. Of the plurality of first signal lines or the second signal line, at least the plurality of first signal lines has a resistor element in proximity to the branch point.

A communication system according to an embodiment of the present disclosure is a communication system that transmits a signal from a plurality of transmission devices to one reception device via a transmission path. In the communication system, the transmission path includes a branch point at a midpoint, includes a plurality of first signal lines that couples the transmission devices and the branch point to each other, and further includes a second signal line that couples the branch point and the reception device to each other. Of the plurality of first signal lines or the second signal line, at least the plurality of first signal lines has a resistor element in proximity to the branch point.

A dual cavity, low power, outdoor combination line amplifier package for cable telecommunication systems is disclosed. It comprises: a dual-cavity main frame, cast in one piece and sectioned into an upper cavity and a lower cavity; a hardline entry cover, having a hardline receptacle PCB with a power supply fixed thereon, electrically and environmentally sealing on one side of the upper cavity; a tap plate cover, having a tap plate PCB fixed thereon and mounted with a plurality of taps, electrically and environmentally sealing on the other side of the upper cavity with the taps facing externally; a gain module heatsink cover, having a gain module PCB and a passive PCB fixed thereon, electrically and environmentally sealing on one side of the lower cavity; and a smart app accessories cover, having a smart access cover PCB fixed thereon, electrically and environmentally sealing on the other side of the lower cavity.

Technologies directed to cable-loss compensation are described. An apparatus includes a triplexer, a front-end module (FEM) circuit, and a control circuit. The triplexer is coupled to a radio frequency (RF) cable. The triplexer receives a first RF signal and a DC power signal from a device via the RF cable and sends a detection signal being indicative of a transmit power level of the first RF signal to the device via the RF cable. The transmit power level includes an insertion loss of the RF cable. The FEM circuit is coupled to the triplexer and includes a power amplifier (PA). The control circuit is coupled to the triplexer and measures the transmit power level of the first RF signal and converts the first RF signal into the detection signal. The control circuit sends the detection signal back to the device via the RF cable and enables the PA.

Technologies directed to cable-loss compensation are described. An apparatus includes a triplexer, a front-end module (FEM) circuit, and a control circuit. The triplexer is coupled to a radio frequency (RF) cable. The triplexer receives a first RF signal and a DC power signal from a device via the RF cable and sends a detection signal being indicative of a transmit power level of the first RF signal to the device via the RF cable. The transmit power level includes an insertion loss of the RF cable. The FEM circuit is coupled to the triplexer and includes a power amplifier (PA). The control circuit is coupled to the triplexer and measures the transmit power level of the first RF signal and converts the first RF signal into the detection signal. The control circuit sends the detection signal back to the device via the RF cable and enables the PA.

An output circuit includes: a first input transistor that is provided between a first power supply line and a first intermediate node; a second input transistor that is provided between a second intermediate node and a second power supply line; a first cascode transistor that is provided between the first intermediate node and an output node, and receives a first clip voltage from a first voltage generation circuit; a second cascode transistor that is provided between the output node and the second intermediate node, and receives a second clip voltage from a second voltage generation circuit; a first switch transistor that is provided between the first intermediate node and a gate of the first cascode transistor, and turns on during power down; and a second switch transistor that is provided between the second intermediate node and a gate of the second cascode transistor, and turns on during power down.

A signal processing system includes a signal processing device including a processor and a memory device storing first information and a signal transmitting device including a memory device storing second information. The processor reads the memory devices to obtain the first information and the second information, determines a threshold date according to a first date indicated by the first information and a margin, and determines whether a second date indicated by the second information is earlier than the threshold date. When the second date is earlier than the threshold date, the processor controls the signal processing device to operate in a limited mode. In the limited mode, the signal processing device does not output any signal to the signal transmitting device or ignores any signal from the signal transmitting device, or the signal processing device only outputs a limited signal to the signal transmitting device.