How to Use a BNC Adapter Cable for CCTV and RF Antennas

By Innov8 Wholesale Ltd | Published: 2026-10-29

Category: How-to Guides

Learn how to connect a 6.35mm mono TS device to a BNC input on a CCTV DVR or RF antenna using a simple adapter cable. Step-by-step instructions included.

Quick answer

Use a 6.35mm (1/4") mono TS to BNC adapter cable to connect audio or RF equipment to a CCTV DVR or antenna. Choose the correct BNC gender (male or female) for your device port, then plug and secure the connection.

Why you might need this adapter

Many CCTV DVRs and RF antennas use BNC connectors for video or signal input, while some audio sources or test equipment output through a 6.35mm mono TS jack. A dedicated adapter cable bridges that gap without extra converters or signal loss.

The cable is also useful when extending a mono audio signal from a mixer or amplifier to a surveillance system that accepts BNC. Because the adapter is built with shielding, it helps maintain signal integrity over short runs.

Choosing between male and female BNC

BNC connectors come in male (plug) and female (jack) versions. Your choice depends on the port on your device. A male BNC adapter inserts into a female BNC port on a DVR or antenna. A female BNC adapter lets you use a standard BNC cable to reach the device.

If you are unsure, check the connector on your device. Most DVRs have female BNC inputs, so a male BNC adapter is the common pick. When in doubt, a female adapter gives you more flexibility to use existing BNC cables.

Step-by-step guide: Connecting your BNC adapter cable

Identify your device ports: Check the input on your CCTV DVR or RF antenna. Look for a BNC female port (common on DVRs) or a male connector. Also confirm your audio or signal source has a 6.35mm mono TS output. A common mistake is assuming all BNC ports are the same gender. Verify before ordering.
Select the correct adapter cable: Choose a 6.35mm mono TS to BNC adapter with the BNC gender that matches your device. For a DVR with a female BNC port, pick a male BNC adapter. For a device with a male BNC connector, pick a female BNC adapter. Using the wrong gender means you will need an extra coupler or a different cable.
Plug in the 6.35mm TS connector: Insert the 6.35mm mono TS plug into your audio source, mixer, or test equipment. Push firmly until it clicks or seats fully. Mono TS plugs carry a single signal (unbalanced), so ensure the tip and sleeve make proper contact. Do not force the plug if it does not fit – check that it is a mono TS, not a stereo TRS, which has an extra ring.
Connect the BNC end: Align the BNC connector with the port on your DVR or antenna. Push straight in and twist the outer sleeve clockwise (usually a quarter turn) to lock it. A secure BNC connection reduces signal dropouts. A loose BNC connection can cause intermittent video or signal loss. Always twist until it clicks.
Test the signal path: Power on your devices and check for video on the DVR monitor or signal on the RF antenna. If there is no signal, verify that the source is outputting a compatible format (e.g., composite video or analog RF) and that the cable is fully seated at both ends. If the signal is missing, try swapping the BNC gender or using a short BNC extension cable to rule out a bad connection.

Product fact

6.35mm (1/4") Mono TS to BNC Adapter Cable for CCTV DVR Camera & RF Antenna – Male or Female Option: This adapter cable connects a 6.35mm (1/4") mono TS jack to a BNC connector, available with either a BNC male or female connector. You can pick the exact gender your device requires, avoiding the need for an extra coupler or adapter.
6.35mm (1/4") Mono TS to BNC Adapter Cable for CCTV DVR Camera & RF Antenna – Male or Female Option