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How do I connect a monitor with 4 BNC connectors to VGA card ?

April 26, 2017BNC card Connect connectors monitor VGA

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How do I connect a monitor with 4 BNC connectors to VGA card ?

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The monitors which use 4 BNC connectors have connectors for Red, Green, Blue and composite sync signals. Because VGA card does not supply composite sync signal then the separate sync signals (HSYNC and VSYNC) must be combined using (usually either OR or XOR) some electronics to make a composite sync signal. The picture below shows the idea of the VGA to 4 BNC connector cable with sync combinining electronics in it.