UHD48-EX230-K Overview and Use Cases

What Is the UHD48-EX230-K?

The OREI UHD48-EX230-K is an 18Gbps 4x4 HDMI matrix extender kit. It connects four HDMI source devices to four HDMI output zones, with each output available through both a local HDMI output and a mirrored CAT output for long-distance display connection.

The kit includes one 18Gbps 4x4 HDMI Matrix and four CAT Receivers. The HDMI sources connect to HDMI IN 1–4 on the Matrix, local displays can connect to HDMI OUT 1–4, and remote displays connect through the CAT Receivers using CAT6 cable.

The UHD48-EX230-K supports HDMI 2.0b and HDCP 2.2 / 1.x, with a video bandwidth of 18Gbps. It supports video resolutions up to 4K@60Hz 4:4:4, HDR10, HDR10+, Dolby Vision, HLG, 4K to 1080p downscaling on each output, HDMI and CAT mirrored outputs, IR return from Receiver to Matrix, 12V PoC to the CAT Receivers, EDID management, CEC control, front-panel control, IR remote control, RS-232 control, LAN control, and Web GUI control. It extends HDMI over CAT up to 230ft / 70m using CAT6 cable.

The UHD48-EX230-K is useful for home theaters, conference rooms, classrooms, sports bars, restaurants, retail displays, control rooms, houses of worship, commercial AV installations, and any setup where four HDMI sources need to be routed to up to four display zones.

IMPORTANT — UHD48-EX230-K Is a 4x4 HDMI Matrix

The UHD48-EX230-K allows four HDMI sources to be routed to four display outputs.

This product routes HDMI sources. It does not create extended desktop screens from one computer unless the computer itself outputs multiple independent HDMI signals.

IMPORTANT — Each HDMI Output Is Mirrored to a CAT Output

Each output zone includes both:

1. Local HDMI output on the Matrix
2. Mirrored CAT output to a CAT Receiver 
    
   This means Output 1 HDMI and Output 1 CAT show the same selected source. Output 2 HDMI and Output 2 CAT show the same selected source, and so on.

IMPORTANT — Supports 4K@60Hz 4:4:4

The UHD48-EX230-K supports video resolutions up to 4K@60Hz 4:4:4.

Supported video features include:

To get 4K@60Hz 4:4:4, the HDMI sources, displays, HDMI cables, CAT6 cable, EDID settings, and output scaler settings must support the required signal.

IMPORTANT — CAT Output Extends up to 230ft / 70m

The CAT outputs can extend HDMI signals up to 230ft / 70m using a single CAT6 cable.

For best performance, use high-quality CAT6 cable with proper termination.

Poor CAT cable, damaged connectors, couplers, patch panels, or poor terminations may reduce distance or cause unstable video.

IMPORTANT — Use Direct CAT Cable Connections

Each CAT Receiver should be connected directly to the corresponding CAT output on the Matrix.

Do not connect the CAT outputs through:

1. Network switch
2. Router
3. Internet network
4. LAN switch
5. Standard Ethernet port
6. Home or office data network 
    
   This product uses CAT cable for HDMI extension to the included Receivers. It is not an AV-over-IP system.

IMPORTANT — 4K to 1080p Downscaling Is Supported Per Output

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

The scaler modes include:

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

Example:

IMPORTANT — 12V PoC Powers the CAT Receivers

The UHD48-EX230-K supports 12V PoC on all CAT ports.

This means the Matrix can power the CAT Receivers through the CAT cable.

The package includes one 12V/2.5A power supply.

If a Receiver does not power on, check the Matrix power supply, CAT cable, and CAT connection.

IMPORTANT — Multiple Control Methods Are Supported

The UHD48-EX230-K can be controlled in several ways.

This makes the Matrix suitable for both simple setups and professional AV control systems.

IMPORTANT — Web GUI Control Is Supported

The UHD48-EX230-K supports control through a browser-based Web GUI.

The manual lists the default IP address as:

The Web GUI can be used for:

1. Input/output switching
2. Preset saving and recall
3. Input naming
4. Output naming
5. EDID management
6. Scaler mode settings
7. Stream on/off
8. CEC control
9. Network settings
10. Password changes
11. Panel lock
12. Beep on/off
13. Serial baud rate
14. Firmware update
15. Factory reset
16. Reboot 
     
    Default login credentials:

IMPORTANT — Front Panel Switching Is Supported

The Matrix front panel includes OUT 1, OUT 2, OUT 3, and OUT 4 buttons.

Press the matching OUT button to cycle through HDMI inputs for that output.

The source LED shows which input is selected for each output.

IMPORTANT — IR Remote Control Is Included

The included Matrix IR remote can control source selection for each output.

IMPORTANT — IR Return From Receiver to Matrix Is Supported

Each CAT Receiver includes IR IN.

The Matrix includes IR OUT 1–4.

This allows IR signals received at the display/Receiver side to be sent back to the Matrix side.

Typical source-control setup:

1. Connect the IR Receiver cable to IR IN on the CAT Receiver.
2. Place the IR Receiver near the remote display.
3. Connect the IR Blaster cable to the corresponding IR OUT port on the Matrix.
4. Place the IR Blaster near the HDMI source device’s IR window. 
    
   Use the source device remote at the display location to control the source device.

IMPORTANT — EDID Management Is Included

The UHD48-EX230-K includes 21 factory-defined EDID settings, 2 user-defined EDID modes, and 8 copy EDID modes.

EDID can be set through:

1. RS-232 command
2. Web GUI 
    
   EDID options include:

Use EDID management when there is no video, wrong resolution, audio compatibility issue, or mixed display capability.

IMPORTANT — CEC Control Is Supported

The UHD48-EX230-K supports CEC control.

CEC can be controlled through the Web GUI or RS-232 commands.

CEC functions include:

1. Input source power on/off
2. Input source menu control
3. Play / pause / stop
4. Previous / next
5. Fast forward / rewind
6. Volume up / down / mute
7. HDMI output display power on/off
8. Active source control 
    
   CEC behavior depends on the connected HDMI devices and their CEC settings.

IMPORTANT — HDMI Cable Length Matters

The manual recommends Premium High Speed HDMI cables.

Poor HDMI cables may cause no video, flickering, black screen, HDR issues, HDCP handshake problems, or unstable 4K@60Hz performance.

Ports and Panel Layout

Step-by-Step Setup

1. Connect HDMI source devices to HDMI IN 1–4 on the Matrix. 
   Examples include Blu-ray players, cable boxes, streaming devices, PCs, laptops, game consoles, DVRs, or NVRs.
2. Connect local displays to HDMI OUT 1–4 if local HDMI outputs are needed.
3. Connect CAT OUTPUT 1 on the Matrix to CAT IN on Receiver 1 using CAT6 cable.
4. Repeat for CAT OUTPUT 2 through CAT OUTPUT 4.
5. Connect each Receiver HDMI OUT to the remote display.
6. Connect the included DC 12V/2.5A power supply to the Matrix.
7. If using IR control, connect IR Blaster cables to IR OUT 1–4 on the Matrix.
8. Place each IR Blaster near the corresponding source device’s IR window.
9. Connect IR Receiver cables to IR IN on the CAT Receivers.
10. Place each IR Receiver near the remote display where the source remote can point.
11. If using RS-232 control, connect the RS-232 cable from the Matrix to the control system or PC.
12. If using Web GUI / LAN control, connect the TCP/IP port to the network or control PC.
13. Power on the Matrix, sources, displays, and any connected control equipment.
14. Use the front panel, IR remote, RS-232, LAN, or Web GUI to route sources to outputs.
15. Set EDID and scaler modes if needed.
16. Test each HDMI output, CAT output, IR return, audio, downscaling, and control method.

CAT Cable Requirement — Critical

Use high-quality CAT6 cable.

Poor CAT cable may cause:

1. No video
2. Flickering
3. Black screen
4. Receiver not powering on
5. Data signal indicator not lighting
6. IR control issues
7. 4K@60Hz not working
8. Signal dropouts
9. Unstable remote display output 
    
   Use direct CAT cable runs whenever possible.

HDMI Cable Requirement — Critical

Use Premium High Speed HDMI cables, especially for 4K@60Hz.

Poor HDMI cables may cause:

1. No picture
2. Flickering
3. Black screen
4. HDR issues
5. Dolby Vision issues
6. HDCP handshake issues
7. No signal on HDMI outputs
8. No signal on CAT outputs 
    
   For troubleshooting, test the HDMI source directly with the display before using the Matrix.

Power Requirement — Critical

The UHD48-EX230-K uses one DC 12V/2.5A power supply for the Matrix.

If a Receiver does not power on, check the Matrix power supply, CAT cable, and CAT output connection.

Understanding the Matrix

The Matrix is installed near the HDMI sources and AV equipment.

It has:

1. Four HDMI inputs
2. Four HDMI outputs
3. Four mirrored CAT outputs
4. Four IR OUT ports
5. TCP/IP control port
6. RS-232 control port
7. Front panel source selection buttons
8. IR remote receiver window
9. DC 12V power input 
    
   The Matrix routes any of the four HDMI inputs to any of the four output zones.

Understanding the CAT Receiver

Each CAT Receiver is installed near a remote display.

Each Receiver has:

1. CAT IN from the Matrix
2. HDMI OUT to the display
3. IR IN for source remote control return
4. SERVICE firmware update port
5. Optional DC 12V power input
6. Power indicator
7. Data signal indicator 
    
   The Receiver converts the CAT signal back to HDMI for the display.

Understanding Matrix Routing

The UHD48-EX230-K can send any input to any output.

Examples:

This is useful when different rooms or displays need different HDMI sources.

Understanding Mirrored HDMI and CAT Outputs

Each output zone has one HDMI output and one CAT output.

They mirror each other.

Example:

The HDMI and CAT outputs in the same zone cannot show different sources.

Understanding 4K to 1080p Downscaling

Downscaling lets a 4K source work with a 1080p display on a selected output.

Use this when:

1. A 4K source is connected
2. Some displays are 4K
3. Some displays are 1080p
4. A 1080p display shows no signal from a 4K source 
    
   Set that output’s scaler mode to 4K to 1080p or Auto.

Understanding Web GUI Control

The Web GUI lets installers control the Matrix from a browser.

Main Web GUI pages include:

Understanding Presets

The Matrix supports saved presets through the Web GUI and RS-232 commands.

Presets allow a full switching layout to be saved and recalled later.

Example:

Understanding EDID Management

EDID tells the HDMI sources what video and audio format to output.

Use EDID when:

1. There is no video
2. Displays show the wrong resolution
3. Audio does not work
4. 4K@60Hz does not display correctly
5. Dolby / DTS audio does not pass correctly
6. Mixed 4K and 1080p displays are connected 
    
   The UHD48-EX230-K supports EDID presets, user-defined EDID, and copy EDID from HDMI or CAT outputs.

Understanding IR Control

IR control allows source remotes to work from the remote display side.

Typical setup:

Do not swap IR Receiver and IR Blaster cables because they have different pin assignments.

Understanding RS-232 Control

RS-232 control allows professional AV systems or a PC to control the Matrix.

RS-232 can control:

1. Power
2. Reboot
3. Factory reset
4. Input/output routing
5. Presets
6. Stream on/off
7. Scaler mode
8. EDID
9. CEC
10. Network settings
11. Panel lock
12. Beep
13. Baud rate 
     
    Default RS-232 settings:

Understanding Signal Indicators

If the Receiver data indicator is off, check the CAT cable, Matrix output routing, source signal, and Receiver connection.

Supported Video and Audio

The UHD48-EX230-K supports video formats including:

Supported HDMI audio formats include:

Supported Technical Specifications

What Source Devices Is the UHD48-EX230-K Compatible With?

The UHD48-EX230-K is compatible with HDMI source devices such as:

1. Blu-ray players
2. DVD players
3. Cable boxes
4. Satellite receivers
5. Streaming devices
6. Media players
7. Desktop PCs
8. Laptops with HDMI output
9. Game consoles
10. DVRs
11. NVRs
12. TV boxes
13. HDMI matrix or switch outputs 
     
    The source must output a supported HDMI resolution up to 4K@60Hz.

What Displays Is the UHD48-EX230-K Compatible With?

The UHD48-EX230-K can connect to HDMI displays such as:

1. 4K TVs
2. 1080p TVs
3. Projectors
4. Monitors
5. Commercial displays
6. Digital signage screens
7. Classroom displays
8. Conference room displays
9. Church displays
10. Restaurant TVs
11. Bar displays
12. Retail displays
13. Local displays near the Matrix
14. Remote displays through CAT Receivers 
     
    For 4K@60Hz, the display must support 4K@60Hz input.

Frequently Asked Questions

Q: What is the OREI UHD48-EX230-K used for? 
A: The UHD48-EX230-K is used to route four HDMI sources to four display zones, with each output available locally through HDMI and remotely through a mirrored CAT Receiver.

Q: Is the UHD48-EX230-K a matrix or splitter? 
A: It is a 4x4 HDMI matrix. It can route different sources to different outputs, unlike a simple splitter.

Q: How many HDMI inputs does it have? 
A: It has four HDMI inputs.

Q: How many HDMI outputs does it have? 
A: It has four HDMI outputs.

Q: How many CAT outputs does it have? 
A: It has four mirrored CAT outputs.

Q: How many CAT Receivers are included? 
A: Four CAT Receivers are included.

Q: What does mirrored CAT output mean? 
A: Each CAT output mirrors the matching HDMI output. For example, HDMI OUT 1 and CAT OUT 1 show the same selected source.

Q: Can HDMI OUT 1 and CAT OUT 1 show different sources? 
A: No. They are mirrored outputs and show the same selected input.

Q: Can different outputs show different sources? 
A: Yes. Each output zone can be assigned a different HDMI input.

Q: Can one source show on all outputs? 
A: Yes. Any input can be routed to all outputs.

Q: Does the UHD48-EX230-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 2.0b.

Q: What HDCP version does it support? 
A: It supports HDCP 2.2 and HDCP 1.x.

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

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

Q: How far can the CAT outputs extend HDMI? 
A: The CAT outputs extend HDMI up to 230ft / 70m over CAT6 cable.

Q: What CAT cable should I use? 
A: Use high-quality CAT6 cable.

Q: Can I connect the CAT outputs through a network switch? 
A: No. The CAT outputs should connect directly to the included CAT Receivers.

Q: Is this AV over IP? 
A: No. This is an HDMI matrix with CAT extension, not an AV-over-IP system.

Q: Does it support PoC? 
A: Yes. It supports 12V PoC on all CAT ports.

Q: Do the CAT Receivers need separate power adapters? 
A: Normally no. The CAT Receivers can be powered by the Matrix through the CAT cable.

Q: What power adapter is included? 
A: The package includes one 12V/2.5A power supply.

Q: Does it support 4K to 1080p downscaling? 
A: Yes. Each HDMI output supports independent 4K to 1080p downscaling.

Q: Why is downscaling useful? 
A: It helps when a 4K source is connected but one or more displays only support 1080p.

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

Q: Can EDID be controlled through Web GUI? 
A: Yes. EDID can be managed through the Web GUI Input page.

Q: Can EDID be controlled through RS-232? 
A: Yes. EDID can be set using RS-232 commands.

Q: Does it support Web GUI control? 
A: Yes. It supports browser-based Web GUI control through the TCP/IP port.

Q: What is the default Web GUI IP address? 
A: The manual lists the default IP address as 192.168.1.100.

Q: What are the default Web GUI passwords? 
A: The default User password is “user” and the default Admin password is “admin.”

Q: Does it support LAN control? 
A: Yes. It supports LAN / TCP/IP control.

Q: Does it support RS-232 control? 
A: Yes. It supports RS-232 command control.

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

Q: Does it include an IR remote? 
A: Yes. A Matrix IR remote is included.

Q: Does it support source control from the remote display side? 
A: Yes. Connect the IR Receiver to the CAT Receiver and the IR Blaster to the matching Matrix IR OUT port.

Q: Does it support CEC? 
A: Yes. CEC control is supported.

Q: Can I save presets? 
A: Yes. Presets can be saved and recalled through the Web GUI or RS-232 commands.

Q: Can I lock the front panel buttons? 
A: Yes. Panel lock is available through the Web GUI and RS-232 commands.

Q: What should I do if there is no video on one output? 
A: Check the selected input source, HDMI cable, CAT cable, Receiver power, display input, stream setting, EDID, scaler mode, and whether the source is active.

Q: What should I do if all outputs have no video? 
A: Check Matrix power, HDMI source output, HDMI input cable, input selection, EDID setting, and whether the Matrix is in standby.

Q: What should I do if a 1080p display does not show a 4K source? 
A: Set that output’s scaler mode to 4K to 1080p or Auto.

Q: What should I do if Web GUI does not open? 
A: Confirm the Matrix IP address, connect the TCP/IP port to the same network as the PC, and make sure the PC is on the same network segment.

Q: What should I do if IR control does not work? 
A: Check that the IR Receiver is connected to the CAT Receiver IR IN, the IR Blaster is connected to the matching Matrix IR OUT, and the IR Blaster is placed near the source device’s IR sensor.

Q: Does the UHD48-EX230-K need external power? 
A: Yes. Connect the included DC 12V/2.5A power supply to the Matrix. The CAT Receivers can be powered through CAT cable using PoC.