CO-UHD330-K Overview and Use Cases

What Is the CO-UHD330-K?

The OREI CO-UHD330-K is an 18Gbps HDMI over coaxial extender kit. It extends HDMI video and audio up to 328ft / 100m using a single RG6 copper 75-ohm coaxial cable.

The kit includes one Transmitter and one Receiver. The HDMI source connects to HDMI IN on the Transmitter, the remote display connects to HDMI OUT on the Receiver, and the coaxial cable connects from COAX OUT on the Transmitter to COAX IN on the Receiver.

The CO-UHD330-K supports HDMI 2.0 and HDCP 2.2, with a video bandwidth of 18Gbps. It supports video resolutions up to 4K@60Hz 4:4:4, HDR, HDR10+, Dolby Vision, HLG, HDMI loop out on the Transmitter, audio embedding through LINE IN, audio de-embedding through AUDIO OUT, advanced EDID management, and bi-directional IR pass-through over coaxial cable. It extends 4K video up to 328ft / 100m using a single RG6 copper 75-ohm coaxial cable.

The CO-UHD330-K is useful for home theaters, security systems, retrofit AV installations, conference rooms, classrooms, digital signage, equipment racks, and installations where existing coaxial cable needs to be used for HDMI signal extension.

IMPORTANT — CO-UHD330-K Extends HDMI Over Coaxial Cable

The CO-UHD330-K uses RG6 copper 75-ohm coaxial cable for the main signal path.

This product does not use CAT cable or fiber optic cable for the main extension path.

IMPORTANT — Use RG6 Copper 75-Ohm Coaxial Cable

The manual specifies RG6 copper 75-ohm coaxial cable.

Poor coaxial cable, damaged connectors, poor terminations, splitters, adapters, or low-quality coaxial runs may reduce performance or cause signal loss.

For best performance, use a direct coaxial cable connection from Transmitter COAX OUT to Receiver COAX IN.

IMPORTANT — Supports 4K@60Hz 4:4:4

The CO-UHD330-K supports video resolutions up to 4K@60Hz 4:4:4.

Supported video features include:

To get 4K@60Hz 4:4:4, the HDMI source, display, HDMI cables, coaxial cable, and EDID setting must support the required signal.

IMPORTANT — HDMI Loop Out Is on the Transmitter

The Transmitter includes HDMI OUT.

This HDMI OUT port can be used to connect a local display near the HDMI source.

This is useful when the source-side location also needs a display, such as an AV rack, media closet, security desk, or control station.

IMPORTANT — Audio Embedding and De-Embedding Are Supported

The CO-UHD330-K supports audio embedding and audio de-embedding.

The Transmitter AUDIO DIP switch selects whether audio comes from HDMI IN or LINE IN.

If LINE is selected and there is no HDMI input signal, the HDMI OUT port outputs a black screen with LINE IN audio, and AUDIO OUT outputs the LINE IN audio.

IMPORTANT — Audio Format Support Has Limitations

The CO-UHD330-K supports up to 5.1-channel audio.

Supported audio formats include:

The manual states that this unit does not support:

• Dolby TrueHD
• DTS-HD
• LPCM

For best compatibility, set the HDMI source audio output to PCM 2.0, Dolby Digital, or DTS.

IMPORTANT — Bi-Directional IR Is Supported

The CO-UHD330-K supports bi-directional IR pass-through over the coaxial cable.

This allows IR control in both directions:

Typical source-control setup:

1. Connect the IR Receiver cable to RECEIVER on the Receiver.
2. Place the IR Receiver near the remote display.
3. Connect the IR Blaster / Flasher cable to FLASHER on the Transmitter.
4. Place the IR Blaster near the HDMI source device’s IR window.

Typical display-control setup:

1. Connect the IR Receiver cable to RECEIVER on the Transmitter.
2. Place the IR Receiver near the source-side control location.
3. Connect the IR Blaster / Flasher cable to FLASHER on the Receiver.
4. Place the IR Blaster near the display’s IR window.

IMPORTANT — Advanced EDID Management Is Included

The Transmitter includes an EDID DIP switch.

Use EDID management when there is no video, wrong resolution, audio compatibility issue, or 4K signal issue.

IMPORTANT — Both Units Need Power

The CO-UHD330-K includes two 12V/1A locking power adapters.

Both the Transmitter and Receiver require power.

If either unit does not power on, check the power adapter, outlet, DC 12V connection, and POWER LED.

Ports and Panel Layout

Step-by-Step Setup

1. Connect the HDMI source device to HDMI IN on the Transmitter. 
   Examples include a Blu-ray player, DVD player, cable box, satellite receiver, streaming device, DVR, NVR, laptop, or desktop PC.
2. Connect a local display to HDMI OUT on the Transmitter if local viewing is needed.
3. Connect RG6 copper 75-ohm coaxial cable from COAX OUT on the Transmitter to COAX IN on the Receiver.
4. Connect HDMI OUT on the Receiver to the remote display.
5. Connect the included DC 12V/1A locking power adapter to the Transmitter.
6. Connect the included DC 12V/1A locking power adapter to the Receiver.
7. If using audio embedding, connect an analog audio source to LINE IN on the Transmitter.
8. If using audio de-embedding, connect speakers, headphones, soundbar, or amplifier to AUDIO OUT on the Receiver.
9. Set the AUDIO DIP switch to HDMI or LINE depending on the audio source.
10. Set the EDID DIP switch based on the required resolution and audio format.
11. If using IR control, connect the IR Receiver and IR Blaster / Flasher cables based on the direction of control needed.
12. Power on the HDMI source, displays, Transmitter, Receiver, and connected audio devices.
13. Check the POWER, LINK, INPUT, and OUTPUT LEDs.
14. Test video, audio, HDMI loop out, audio embedding, audio de-embedding, and IR control.

Coaxial Cable Requirement — Critical

Use a single RG6 copper 75-ohm coaxial cable.

Poor coaxial cable may cause:

• No video
• Flickering
• Black screen
• LINK LED off
• 4K@60Hz not working
• Audio dropouts
• IR control issues
• Intermittent signal

Use a direct coaxial cable run whenever possible.

HDMI Cable Requirement — Critical

Use high-quality HDMI cables rated for 18Gbps when using 4K@60Hz 4:4:4.

Poor HDMI cables may cause:

• No picture
• Flickering
• Black screen
• HDR issues
• Dolby Vision issues
• HDCP handshake issues
• No signal on HDMI loop out
• No signal on Receiver HDMI OUT

For troubleshooting, test the HDMI source directly with the display before using the extender.

Power Requirement — Critical

Both units require DC 12V/1A power.

Power consumption is listed as:

Understanding the Transmitter

The Transmitter is installed near the HDMI source.

It has:

• HDMI IN
• HDMI OUT loop output
• COAX OUT
• LINE IN
• IR RECEIVER and IR FLASHER ports
• AUDIO DIP switch
• EDID DIP switch
• SERVICE firmware port
• DC 12V power input
• POWER, LINK, INPUT, and OUTPUT LEDs

The Transmitter receives HDMI, can embed analog audio, provides local HDMI loop output, and sends the signal over coaxial cable to the Receiver.

Understanding the Receiver

The Receiver is installed near the remote display.

It has:

• COAX IN
• HDMI OUT
• AUDIO OUT
• IR RECEIVER and IR FLASHER ports
• SERVICE firmware port
• DC 12V power input
• POWER, LINK, and OUTPUT LEDs

The Receiver receives the coaxial signal, outputs HDMI to the display, and provides analog audio output for de-embedding.

Understanding Audio Embedding

Audio embedding allows an external analog audio source to be inserted into the HDMI output.

Example:

Set the AUDIO DIP switch to LINE when you want to use the audio from LINE IN.

Understanding Audio De-Embedding

Audio de-embedding allows audio to be extracted from the HDMI signal and output through the Receiver AUDIO OUT port.

Use AUDIO OUT for:

• Speakers
• Headphones
• Soundbar
• Amplifier
• Audio receiver
• Powered speakers

For best compatibility with analog audio output, use PCM 2.0 audio from the HDMI source.

Understanding Bi-Directional IR

Bi-directional IR lets remote control signals travel both ways over the coaxial extender connection.

Use the IR Receiver cable where the remote will be pointed.

Use the IR Blaster / Flasher cable near the device being controlled.

IR receiving distance:

Do not swap the IR Receiver and IR Blaster cables because their pin definitions are different.

Understanding LED Indicators

Use these LEDs first when troubleshooting signal issues.

Supported Video and Audio

The CO-UHD330-K supports video formats including:

Supported audio formats include:

Supported Technical Specifications

What Source Devices Is the CO-UHD330-K Compatible With?

The CO-UHD330-K is compatible with HDMI source devices such as:

• Blu-ray players
• DVD players
• Cable boxes
• Satellite receivers
• Streaming devices
• Media players
• DVRs
• NVRs
• Laptops with HDMI output
• Desktop PCs with HDMI output
• HDMI matrix outputs
• HDMI switch outputs

The source must output a supported HDMI resolution up to 4K@60Hz.

What Displays Is the CO-UHD330-K Compatible With?

The CO-UHD330-K can connect to HDMI displays such as:

• 4K TVs
• 1080p TVs
• Projectors
• Monitors
• Commercial displays
• Digital signage displays
• Classroom displays
• Conference room displays
• Security monitoring displays
• Local display near the source
• Remote display near the Receiver

For 4K@60Hz, the display must support 4K@60Hz input.

What Audio Devices Is the CO-UHD330-K Compatible With?

The audio ports can connect to:

• MP3 players
• Audio source devices
• Speakers
• Headphones
• Soundbars
• Amplifiers
• Powered speakers
• Audio receivers

Use LINE IN for analog audio embedding and AUDIO OUT for analog audio de-embedding.

Frequently Asked Questions

Q: What is the OREI CO-UHD330-K used for? 
A: The CO-UHD330-K is used to extend HDMI video, audio, and IR control over a single RG6 copper 75-ohm coaxial cable.

Q: Does the CO-UHD330-K support 4K@60Hz? 
A: Yes. It supports video resolutions up to 4K@60Hz 4:4:4.

Q: Does it support 8K? 
A: No. It supports up to 4K@60Hz.

Q: Does it support 4K@120Hz? 
A: No. It does not support 4K@120Hz.

Q: What HDMI version does it support? 
A: It supports HDMI 2.0.

Q: What HDCP version does it support? 
A: It supports HDCP 2.2.

Q: What video bandwidth does it support? 
A: It supports 594MHz / 18Gbps video bandwidth.

Q: How far can it extend HDMI? 
A: It extends HDMI up to 328ft / 100m over RG6 copper 75-ohm coaxial cable.

Q: What coaxial cable should I use? 
A: Use RG6 copper 75-ohm coaxial cable.

Q: Can I use CAT cable with this product? 
A: No. The main extension path uses coaxial cable, not CAT cable.

Q: Can I use fiber cable with this product? 
A: No. This model is an HDMI over coaxial extender.

Q: Can I connect it through a coax splitter? 
A: A direct coaxial cable connection is recommended. Splitters, adapters, or poor coaxial paths may cause signal issues.

Q: Does the Transmitter have HDMI loop out? 
A: Yes. The Transmitter has HDMI OUT for a local display.

Q: What is HDMI loop out used for? 
A: It lets you connect a local display near the HDMI source while also extending the signal to the remote display.

Q: Does it support audio embedding? 
A: Yes. The Transmitter has LINE IN for analog audio embedding.

Q: Does it support audio extraction? 
A: Yes. The Receiver has AUDIO OUT for analog audio de-embedding.

Q: What does the AUDIO DIP switch do? 
A: It selects whether the HDMI OUT and AUDIO OUT use audio from HDMI IN or audio from LINE IN.

Q: What audio formats are supported? 
A: It supports PCM 2.0, Dolby Digital 2.0 / 5.1, and DTS 2.0 / 5.1.

Q: Does it support Dolby TrueHD? 
A: No. The manual states that Dolby TrueHD is not supported.

Q: Does it support DTS-HD? 
A: No. The manual states that DTS-HD is not supported.

Q: Does it support LPCM? 
A: The manual states that LPCM is not supported.

Q: Does it support Dolby Atmos? 
A: Dolby Atmos is not listed in the manual.

Q: Does it support HDR? 
A: Yes. It supports HDR, HDR10+, Dolby Vision, and HLG.

Q: Does it support IR control? 
A: Yes. It supports bi-directional IR pass-through.

Q: Which IR cable goes where for source control? 
A: Connect the IR Receiver cable to RECEIVER on the Receiver and the IR Blaster / Flasher cable to FLASHER on the Transmitter.

Q: Which IR cable goes where for display control? 
A: Connect the IR Receiver cable to RECEIVER on the Transmitter and the IR Blaster / Flasher cable to FLASHER on the Receiver.

Q: What IR frequency is supported? 
A: The IR pin diagram lists 20–60kHz.

Q: What is the IR receiving distance? 
A: The manual lists 0–5m at ±45° and 0–8m at ±90°.

Q: Does it support EDID management? 
A: Yes. It supports EDID through a DIP switch on the Transmitter.

Q: What is the default EDID setting? 
A: The default setting is 00, which copies the Receiver HDMI OUT display EDID.

Q: What EDID should I use for 1080p? 
A: Use EDID setting 10 for HDMI 1080p@60Hz with 2CH PCM audio.

Q: What EDID should I use for 4K@60Hz? 
A: Use EDID setting 11 for HDMI 4K@60Hz 4:4:4 with 5.1CH PCM / DTS / Dolby audio.

Q: Do both units need power? 
A: Yes. Both Transmitter and Receiver require DC 12V/1A power.

Q: How many power adapters are included? 
A: Two 12V/1A locking power adapters are included.

Q: What should I do if there is no video? 
A: Check both power adapters, HDMI source, HDMI cables, RG6 coaxial cable, EDID setting, display input, and LINK / INPUT / OUTPUT LEDs.

Q: What should I do if the LINK LED is off? 
A: The Transmitter and Receiver are not connected or the system is powered off. Check both power adapters and the coaxial cable connection.

Q: What should I do if the INPUT LED is off? 
A: No video signal is detected. Check the HDMI source, HDMI cable, source output setting, and HDMI IN connection.

Q: What should I do if the OUTPUT LED is off? 
A: Check whether the HDMI OUT port is connected to a powered display on the correct input.

Q: What should I do if 4K@60Hz does not work? 
A: Use 18Gbps HDMI cables, RG6 copper 75-ohm coaxial cable within 328ft / 100m, confirm the source and display support 4K@60Hz, and set EDID to 4K@60Hz mode.

Q: What should I do if audio does not work? 
A: Check the AUDIO DIP switch, source audio setting, LINE IN / AUDIO OUT connections, and use a supported audio format such as PCM 2.0, Dolby Digital, or DTS.

Q: What should I do if IR control does not work? 
A: Confirm the IR Receiver and IR Blaster / Flasher cables are connected in the correct direction and that the IR Blaster is placed near the controlled device’s IR sensor.

Q: Does the CO-UHD330-K need external power? 
A: Yes. Connect the included DC 12V/1A locking power adapters to both the Transmitter and Receiver.