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What is the difference between active and passive video balun?

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What is the difference between active and passive video balun?

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Active video baluns (also known as UTP baluns) are powered so that they can amplify the video signal longer distances than passive (non-powered) baluns. CCTV baluns transmit video signal from security cameras using unshielded twisted pair / UTP cable such as CAT-5 cable instead of coax cable, such as RG59.

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