UHD-808 Overview and Use Cases

What Is the UHD-808?

The OREI UHD-808 is an 18Gbps 8x8 HDMI matrix with ARC function, audio de-embedding, independent downscaling, EDID management, RS-232 control, LAN control, and Web GUI control. It allows you to connect up to eight HDMI source devices and route them to up to eight HDMI displays.

The UHD-808 can send any HDMI input to any HDMI output. This means each display can show the same source or a different source depending on the routing setup.

The UHD-808 supports HDMI 2.0b, HDCP 2.2 / HDCP 1.4, video resolutions up to 4K@60Hz YUV 4:4:4, 18Gbps video bandwidth, HDR10, HDR10+, Dolby Vision, HLG, ARC, CEC, smart EDID management, and independent 4K to 1080p downscaling for each HDMI output. It also supports HDMI audio pass-through up to 7.1CH, including LPCM, Dolby TrueHD, DTS-HD Master Audio, Dolby Atmos, and DTS:X. 

The UHD-808 is useful for commercial AV systems, restaurants, sports bars, showrooms, conference rooms, classrooms, control rooms, houses of worship, retail displays, and any installation where multiple HDMI sources need to be routed to multiple displays.

IMPORTANT — UHD-808 Is a Matrix, Not a Basic Splitter

The UHD-808 is an 8-input, 8-output HDMI matrix.

This means any of the eight HDMI inputs can be routed to any of the eight HDMI outputs.

For example:

• Output 1 can show Input 1 
• Output 2 can show Input 4 
• Output 3 can show Input 8 
• Output 4 can show Input 2 

You can also route the same input to multiple outputs or all outputs.

This is different from a basic HDMI splitter, which only duplicates one source to multiple displays.

IMPORTANT — UHD-808 Supports 4K@60Hz, Not 8K or 4K@120Hz

The UHD-808 supports video resolutions up to 4K@60Hz YUV 4:4:4.

It does not support 8K or 4K@120Hz.

For 8K or 4K@120Hz setups, use an HDMI 2.1 matrix or switch that supports the required bandwidth.

IMPORTANT — Each HDMI Output Supports Independent Downscaling

Each HDMI output supports independent 4K to 1080p downscaling.

This is useful when some displays support 4K and others only support 1080p.

For example, if Output 1 is connected to a 4K TV and Output 2 is connected to a 1080p TV, the scaler can help the 1080p display receive a compatible signal.

Downscaling does not upgrade 1080p to 4K. It only reduces a 4K signal to 1080p for compatibility with lower-resolution displays.

IMPORTANT — Audio De-Embedding Is Available for All 8 Outputs

The UHD-808 includes audio de-embedded outputs for each HDMI output.

It includes:

• 8 coaxial audio outputs 
• 8 analog L/R 3.5mm audio outputs 

This allows audio from each HDMI output path to be sent separately to an amplifier, speaker system, audio processor, or other compatible audio device.

IMPORTANT — Analog L/R Output Supports PCM 2.0 Only

The analog L/R 3.5mm audio outputs support PCM 2.0 only.

If you are using the analog output and there is no audio, set the HDMI source device to PCM, LPCM, or Stereo audio.

The analog output does not support Dolby Digital, DTS, Dolby TrueHD, DTS-HD Master Audio, Dolby Atmos, or other surround formats.

IMPORTANT — Coax Audio Output Has Format Limits

The coaxial audio outputs support LPCM 2.0, Dolby Digital / Plus, and DTS 5.1.

If there is no audio from the coax output, make sure the connected amplifier or audio device supports the selected audio format.

For most troubleshooting, set the source device to PCM stereo or Dolby Digital, depending on what the connected audio system supports.

IMPORTANT — ARC Audio Outputs Through Coax

The UHD-808 supports ARC on the HDMI outputs.

When ARC is enabled for an HDMI output, the ARC audio from the connected display is extracted through the coaxial audio output.

This is useful when you want audio from a TV’s internal apps or tuner to return to the matrix and output to an external audio system through coax.

The TV connected to that output must support ARC for this function to work.

IMPORTANT — Web GUI and RS-232 Control Are Supported

The UHD-808 can be controlled by:

• Front-panel buttons 
• IR remote 
• RS-232 
• LAN / TCP/IP 
• Web GUI 

The Web GUI allows installers to configure routing, EDID, output settings, ARC, scaler mode, CEC, network settings, system settings, presets, and firmware updates.

The default IP address listed in the manual is 192.168.0.100, but the actual IP address may vary depending on network settings.

Ports and Panel Layout

Step-by-Step Setup

1. Connect the included 12V/5A power adapter to the UHD-808. 
2. Connect your HDMI source devices to HDMI Input 1 through HDMI Input 8. 
   Examples include PCs, Blu-ray players, streaming devices, set-top boxes, cable boxes, satellite receivers, media players, or gaming consoles. 
3. Connect HDMI Output 1 through HDMI Output 8 to your TVs, monitors, projectors, or commercial displays. 
4. If using analog audio extraction, connect the L/R 3.5mm output for the desired output channel to powered speakers, an amplifier, or an audio system. 
5. If using coaxial audio extraction, connect the coax output for the desired output channel to a compatible amplifier, AVR, sound system, or audio processor. 
6. If using LAN or Web GUI control, connect the TCP/IP port to a router or network switch. 
7. If using RS-232 control, connect the RS-232 port to a PC or control system. 
8. If the matrix is installed in a cabinet or out of line of sight, connect the included IR receiver cable to the IR EXT port. 
9. Power on the HDMI sources, displays, audio devices, and UHD-808. 
10. Use the front-panel buttons, IR remote, Web GUI, RS-232, or LAN control to route inputs to outputs. 

HDMI Cable Requirement — Critical

For best performance, use Premium High Speed HDMI cables.

The manual recommends the following HDMI cable lengths:

Poor-quality or longer HDMI cables may cause:

• No video output 
• Flickering 
• Black screen 
• Audio dropouts 
• HDR or Dolby Vision issues 
• HDCP handshake issues 
• ARC audio issues 
• 4K@60Hz not displaying correctly 

For troubleshooting, test the source directly with the display, try shorter HDMI cables, and check EDID settings.

Understanding Matrix Routing

The UHD-808 allows any input to be routed to any output.

This allows each display to show a different source, or multiple displays to show the same source.

Example:

Understanding Front-Panel Switching

To route a source using the front panel:

1. Press the desired Output button first. 
2. Press the desired Input button second. 

For example, to send Input 3 to Output 2:

1. Press Output 2. 
2. Press Input 3. 

To send one input to all outputs, use the ALL function on the remote or the Web GUI.

Understanding Downscaling

The UHD-808 supports independent 4K to 1080p downscaling for each output.

Scaler modes include:

Use downscaling when a 4K source needs to be sent to a display that only supports 1080p.

Understanding ARC Mode

ARC stands for Audio Return Channel.

On the UHD-808, ARC can be enabled or disabled for HDMI outputs.

When ARC is enabled:

• The connected TV must support ARC 
• The TV sends audio back through HDMI 
• The ARC audio is extracted through the coaxial audio output 

This is useful for TV apps, smart TV audio, or tuner audio that needs to be sent to an external audio system.

Understanding Audio Extraction

The UHD-808 can de-embed HDMI audio to analog and coaxial outputs.

If analog audio is not working, set the source device to PCM or Stereo.

If coax audio is not working, check that the connected audio device supports the selected audio format.

EDID Management

The UHD-808 includes 31 EDID modes.

It has:

• 21 factory-defined EDID modes 
• 2 user-defined EDID modes 
• 8 copy EDID modes 

EDID can be configured using:

• Front-panel buttons 
• RS-232 commands 
• Web GUI 

Use stereo audio modes for TVs or stereo audio systems.

Use Dolby/DTS 5.1 modes for compatible surround systems.

Use HD Audio 7.1 modes when using HDMI audio with a compatible AVR or home theater system.

Use Copy Output modes when you want the source device to follow the capability of a specific connected display.

Understanding Web GUI Control

The UHD-808 supports browser-based Web GUI control through the TCP/IP port.

The Web GUI can be used to:

• View product status 
• Route HDMI inputs to outputs 
• Save, recall, and clear presets 
• Rename inputs and outputs 
• Set EDID modes 
• Upload or download EDID files 
• Check output cable status 
• Set scaler mode 
• Turn ARC on or off 
• Enable or disable output stream 
• Control CEC functions 
• Modify network settings 
• Change passwords 
• Lock or unlock front-panel buttons 
• Turn beep on or off 
• Set OLED / LCD display time 
• Set RS-232 baud rate 
• Update firmware 
• Factory reset or reboot the unit 

Default Web GUI login:

Understanding Network Setup

The default IP address listed in the manual is 192.168.0.100.

The current IP address can be checked in two ways:

1. From the front panel 
   Press MENU on the initial OLED screen, enter the IP interface, and use UP/DOWN to check the current IP address. 
2. Through RS-232 
   Send the command r ipconfig! to view the current network information. 

The IP address may vary depending on whether the device is set to Static IP or DHCP.

RS-232 Control

The UHD-808 supports RS-232 command control through the rear DB9 port.

Default RS-232 settings:

RS-232 commands can control:

• Power on/off 
• Reboot 
• Factory reset 
• Device status 
• Input/output connection status 
• Beep 
• Panel lock 
• OLED / LCD display time 
• Presets 
• Routing 
• Output stream 
• Scaler mode 
• EDID settings 
• ARC on/off 
• CEC control 
• Network settings 

Understanding the IR Remote

The included IR remote can be used to route sources and control power.

To route a source using the remote, press the Output button first, then press the Input button.

Example: Press Output 4, then Input 2 to send Input 2 to Output 4.

To send one source to all displays, press ALL, then press the desired Input button.

What Source Devices Is the UHD-808 Compatible With?

The OREI UHD-808 is compatible with HDMI source devices such as:

• PCs 
• Laptops with HDMI output 
• Blu-ray players 
• DVD players 
• Streaming devices 
• Cable boxes 
• Satellite receivers 
• Set-top boxes 
• Media players 
• Gaming consoles 
• Security DVRs 
• Presentation systems 

For 4K@60Hz, HDR10+, Dolby Vision, or HLG, the source device, HDMI cable, and display must all support the selected format.

What Displays Is the UHD-808 Compatible With?

The UHD-808 can connect to HDMI displays such as:

• 4K TVs 
• 1080p TVs 
• Monitors 
• Projectors 
• Commercial displays 
• Conference room displays 
• Classroom displays 
• Retail displays 
• Sports bar displays 
• Control room displays 

For 4K@60Hz output, the connected display must support 4K@60Hz over HDMI.

For mixed 4K and 1080p displays, use the independent downscaler function.

What Audio Devices Is the UHD-808 Compatible With?

The UHD-808 can send audio to:

• Coaxial amplifiers 
• AV receivers 
• Audio processors 
• Powered speakers 
• Stereo amplifiers 
• 2.0 speaker systems 
• HDMI TVs or AVRs through HDMI output 

For L/R analog audio, set the source to PCM or Stereo.

For coaxial audio, use PCM, Dolby Digital, or DTS depending on what the connected audio device supports.

Frequently Asked Questions

Q: What is the OREI UHD-808 used for? 
A: The UHD-808 is used to connect up to eight HDMI source devices to up to eight HDMI displays. It can route any input to any output and supports audio de-embedding, ARC, downscaling, EDID management, Web GUI, RS-232, and LAN control.

Q: Is the UHD-808 a splitter? 
A: It can send the same source to multiple displays, but it is more than a splitter. It is an 8x8 HDMI matrix, meaning each output can independently select any input.

Q: Can each output show a different source? 
A: Yes. Each of the eight outputs can show a different HDMI input.

Q: Can all displays show the same source? 
A: Yes. Use the ALL function on the remote, Web GUI, or control command to route one input to all outputs.

Q: How many HDMI sources can I connect? 
A: You can connect up to eight HDMI source devices.

Q: How many displays can I connect? 
A: You can connect up to eight HDMI displays.

Q: Does the UHD-808 support 4K@60Hz? 
A: Yes. It supports up to 4K@60Hz YUV 4:4:4 with 18Gbps bandwidth.

Q: Does the UHD-808 support 8K? 
A: No. The UHD-808 supports up to 4K@60Hz. It does not support 8K.

Q: Does the UHD-808 support 4K@120Hz? 
A: No. It supports up to 4K@60Hz.

Q: Does the UHD-808 support HDR and Dolby Vision? 
A: Yes. It supports HDR10, HDR10+, Dolby Vision, and HLG.

Q: Does the UHD-808 support downscaling? 
A: Yes. Each HDMI output supports independent 4K to 1080p downscaling.

Q: Does the UHD-808 have audio extraction? 
A: Yes. It has 8 coaxial audio outputs and 8 analog L/R 3.5mm audio outputs.

Q: What audio does the analog L/R output support? 
A: The analog L/R output supports PCM 2.0 only.

Q: What audio does the coax output support? 
A: The coax output supports LPCM 2.0, Dolby Digital / Plus, and DTS 5.1.

Q: Does HDMI audio still pass through to the displays? 
A: Yes. HDMI audio passes through to the displays and supports up to 7.1CH HD audio, including Dolby TrueHD, DTS-HD Master Audio, Dolby Atmos, and DTS:X when supported by the connected equipment.

Q: Does the UHD-808 support ARC? 
A: Yes. ARC is supported on HDMI outputs. When ARC is enabled, ARC audio from the display can be extracted through the coaxial audio output.

Q: What should I do if analog audio is not working? 
A: Set the source device audio output to PCM, LPCM, or Stereo because the analog L/R output supports PCM 2.0 only.

Q: What should I do if coax audio is not working? 
A: Make sure the connected audio device supports the selected format. Try PCM stereo or Dolby Digital from the source device.

Q: Does the UHD-808 support CEC? 
A: Yes. CEC is supported and can be controlled through the Web GUI or RS-232 commands.

Q: Does the UHD-808 support EDID management? 
A: Yes. It supports 21 factory EDID modes, 2 user-defined EDID modes, and 8 copy EDID modes.

Q: Can I control the UHD-808 from a web browser? 
A: Yes. Connect the TCP/IP port to the network and access the Web GUI using the matrix IP address.

Q: What is the default IP address? 
A: The manual lists the default IP address as 192.168.0.100, but the current IP may vary depending on network settings.

Q: What are the default Web GUI login credentials? 
A: The default User login is user, and the default Admin login is admin.

Q: How do I find the current IP address? 
A: Use the front-panel MENU and UP/DOWN buttons to check the IP address, or send the RS-232 command r ipconfig!.

Q: Does the UHD-808 support RS-232 control? 
A: Yes. It supports RS-232 command control through the DB9 port.

Q: What is the default RS-232 baud rate? 
A: The default baud rate is 115200.

Q: Can I save routing presets? 
A: Yes. The Web GUI and RS-232 commands support saving and recalling up to 8 presets.

Q: How do I switch sources from the front panel? 
A: Press the desired Output button first, then press the desired Input button.

Q: How do I send one input to all outputs using the remote? 
A: Press ALL, then press the desired Input button.

Q: What HDMI cable length should I use? 
A: The manual recommends 16ft / 5m for 4K60, 32ft / 10m for 4K30, and 50ft / 15m for 1080p60 using Premium High Speed HDMI cables.

Q: What should I do if there is no video output? 
A: Check the routing, confirm HDMI cables are connected properly, try shorter HDMI cables, check EDID settings, and lower the source resolution for testing.

Q: Does the UHD-808 need external power? 
A: Yes. Connect the included 12V/5A power adapter.