How to Connect a BNC Cable to a Monitor

Written by richard asmus
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How to Connect a BNC Cable to a Monitor
RCA connectors push into place but can be easily disconnected accidentally. (Jupiterimages/Photos.com/Getty Images)

Television signals travel over coaxial cables that usually have RCA plugs that simply push into place for many video connections. But cables for more professional equipment sometimes have BNC connectors that are held in place by a bayonet lug on the jack. A quarter-turn of the outer collar of the BNC connector holds the cable in place to prevent accidental disconnections. If a monitor has BNC jacks, the process is easier. But if it has RCA jacks, you need an adaptor.

Skill level:
Moderately Easy

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Things you need

  • RCA-to-BNC adaptor (optional)

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Instructions

  1. 1

    Place the collar of the BNC connector over the BNC terminal on the monitor.

    How to Connect a BNC Cable to a Monitor
    BNC connectors need a quarter-turn of the outer connector to disconnect them. (Hemera Technologies/PhotoObjects.net/Getty Images)
  2. 2

    Apply a slight pressure until the grooves on the collar align with the "bayonet" lugs on the collar of the connector. You will feel the connector move onto the terminal.

  3. 3

    Push the BNC connector fully onto the terminal until it stops.

  4. 4

    Turn the collar of the BNC connector one-quarter turn to the right until it stops.

Tips and warnings

  • If your monitor has RCA terminals, connect the BNC cable to an RCA male-to-BNC female adaptor and then push it into the RCA terminal on the monitor.
  • You cannot connect a BNC cable to a VGA monitor. The monitor must be manufactured to accept a signal carried by coaxial cable.

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