As shown in the figure, the TV video sampling circuit can sample the TV signal with a negligible small loss to the transmission line. He uses two "N" connectors for input and output connections, and the video output uses one. The BNC connector, the detection output is connected to the monitor and display, so that the transmitter detects the appropriate video level and synchronization level. The circuit provides two different forms, both of which have relative power half output prompts. But one of them is more accurate, the circuit has two PC controls, one to control the video level and the other to control the power output.
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