How To Convert Coax Cable To HDMI

A new TV probably won’t have a coax connector. In addition to HDMI, USB, and component connectors, it may also have coax connectors. It might be difficult to connect an older cable or satellite box that only outputs coax.

Despite the fact that you might think coax is a bit outdated, there are still plenty of excellent devices out there. There are plenty of options available for you whether you are still using an old VHS player, an old game console, or an antenna. Let us walk you through the options for making your older devices compatible with your newer ones in this article.

AV connection types

For some of you, it may seem obvious to overlook the receiver’s output, but it is an easy mistake. Since many years, coax has been the default output and has only recently been replaced by SCART or HDMI. There were many cable and satellite receivers that came with coax, SCART, and HDMI connections. There were few coax-only systems.

Coaxial connections

In the 19th century, coaxial cable was invented to carry radio signals. The core consists of two layers of copper surrounded by insulation and shielding. In order to deliver analog signals without causing interference, the idea was to keep interference to a minimum. Until recently, this technology was used in radio and telegraphy, television, and broadband. Eventually, fiber or other technologies that offered faster transmission speeds replaced it.

Although coax is insulated, it requires frequent repeating and suffers from data loss over distance. Coax was popular because it was cheap, easy to use, and superior to anything else at the time. The material was also very durable. The fiber optic cable is faster and can carry more data at once. Despite requiring more upfront investment, fiber requires less maintenance.


In the home, HDMI, or High-Definition Multimedia Interface, has replaced coax. For high-definition or ultra-high-definition broadcasts, it carries signals with the maximum amount of data possible. As well as carrying data, it can also carry audio. A Japanese TV manufacturer invented HDMI to improve picture quality, and it works exceptionally well.

As HDMI is purely digital, it is insulated against loss and does not require frequent repeating over distance. At higher speeds, it can carry more data for the same size. With the correct configuration, digital transmissions are immune to interference, making them ideal for busy households with lots of devices and WiFi networks.

Choosing the Right Coax to HDMI Adapter

Converting Coax to HDMI and vice versa is possible in a couple of ways. You may find that one option works better than another depending on the devices you’re trying to connect. To get everything hooked up and working properly, you’ll need some upgraded equipment. Depending on the devices you intend to connect, you will need different equipment. Here’s how it works.

1. Over-the-Air (OTA) to HDMI Converters

You’ll need a simple OTA coax to HDMI adapter if you have indoor/outdoor antennas with coax but no coax input on your TV. It costs between $30-$50. Since air signals are not encrypted, no major conversion components are needed.

2. Satellite/Cable TV Box Coax to HDMI Converters

The receiver may need to be replaced if it only has a coax output, depending on your cable provider. You may also need a converter if the RCA outputs on your satellite or cable box have failed. A satellite/cable box without SCART or HDMI output could be up to 25 years old and should be replaced. If it is working fine or your service provider wants to charge you for an upgrade, it may not be the best choice.

Satellite TV or cable TV coax-to-HDMI converters must include demodulation, which raises the price to over $100. You can watch Coax TV signals on channel 3 or 4 on your TV using radio frequency modulation (RF). Coax is also used to transmit encrypted signals from cable boxes and satellite dishes. Therefore, the converter must also have decryption technology. Especially with all the similar options out there that don’t work for your needs, this type of coax to HDMI converter is hard to find. To convert coax to HDMI, you just need a cable TV demodulator.

3. VCR/Old Game Console to HDMI Converters

Earlier game consoles and VCRs did not have HDMI outputs because they weren’t available. Therefore, you need a coax-to-HDMI converter for RCA or NTSC. To convert the RF signal to HDMI, it needs a demodulator. You will need one of the same $100+ converters used for cable TV coax to HDMI in this scenario.

How to Actually Convert Coax to HDMI

To convert from coax to HDMI if you are not able to obtain updated devices with HDMI connections, follow these steps.

  1. Connect your source’s coax to the converter’s “Coax In” port.

  2. A HDMI cable should be inserted into the converter’s “HDMI Out” port.

  3. Your HDTV should be connected to the other end of the HDMI cable.

  4. Make sure both the source and TV are turned on.

  5. To receive the coax signal, set the converter box to channel 3 or 4.

  6. Ensure that the HDMI input on your HDTV is set to the correct one.

OTA antenna coax to HDMI converters or cable TV/satellite demodulators to HDMI converters follow the same process.

Frequently Asked Questions

Which is better, coax or HDMI?

As well as bringing back nostalgia, the transition from coax to HDMI is beneficial to the everyday user. Both video and audio quality are enhanced by the latter, as it provides a stronger and faster connection. Furthermore, HDMI cables require only one connection instead of two or more with coax, so they’re easier to use.

Are coaxial cables still used today?

To this day, some TV antenna equipment still uses cables. It is still necessary to use a converter to enjoy network content on your TV if you have cut the cord but still want your local channels.

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