Abstract: A signal adjuster is disclosed to include a first connector connected to a signal source through a high-frequency signal cable, a second connector connected to a video output device, a buffer connected between the first connector and the second connector, an adjustable equalizer connected between the buffer and the second connector for adjusting signal strength of a high frequency signal from the signal source, an amplifier for amplifying the enhanced high frequency signal from the adjustable equalizer, and a driver for driving the second connector to output the amplified high frequency signal from the amplifier to the video output device.

Abstract: Disclosed is a signal filter assembly, which includes a circuit board electrically connected between a cable and a high frequency electric connector, and a plurality of filters installed in the circuit board and respectively electrically connected to the signal wires of the transmission wires of the cable, each filter being formed of a parallel circuit of a resistor and a capacitor.

Abstract: A high-frequency transmission cable is disclosed to include a connector, which has the terminals thereof arranged into two vertically spaced rows, an adapter board, which is set in between the two rows of terminals of the connector to eliminate interference between the terminals during transmission of high-frequency signal and which has transmission circuits arranged on the top and bottom surfaces thereof and respectively soldered to the two rows of terminals of the connector, a metal grounding face set between the top surface and the bottom surface, and conducting holes respectively electrically connecting the transmission circuits to the metal grounding face, and a cable, which has an outer insulator and electric wires surrounded by the outer insulator and soldered with the conducting wires to the transmission circuits of the adapter board.