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What are the considerations for PCB layout, and connector selection for video signals. Is it necessary to follow 75ohm impedance criteria in a closed system. The pipeline starts at Sony FCB IX 11 A camera core which outputs VBS 1V p-p NTSC signal with no impedance specifications, goes to a processing board (TI processor based), and outputs as a same specification video signal. I do not have real estate budget to accomodate 75 ohm RF connectors in the design and was wondering if I could work with Micro D connectors, and treat video as just another analog signal. The output is not to be transmitted over lengths more than 2 feet.

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You can get microminature coax connectors; I have some on my board here that are about 3mm square. – pjc50 Dec 17 '12 at 13:40
This really depends on the bandwidth of your monitor and the performance you need. It should not be hard to run some experiments with intentionally "evil" cabling and get a sense of the consequences. – Chris Stratton Dec 17 '12 at 15:39
"RCA" connectors re commonly used for composite video. Take a look at the back of any DVD player or TV. – tcrosley Jan 24 at 20:23

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For 2 feet, I believe trying 'evil' cabling and result is likley not noticable on screen. For better result, microminature coax connectors, used on Wifi, etc. tends to be 50 ohms. Although not 75 ohms, it is better than Micro D connectors.

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