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UHD-EXB400UR-K Oveview and Use Cases

Siddhant
Updated

What Is the UHD-EXB400UR-K?

The OREI UHD-EXB400UR-K is an 18Gbps HDBaseT HDMI extender kit with USB 2.0, bi-directional IR, EDID management, and Power over Cable. It extends HDMI video, HDMI audio, USB 2.0, and IR control over a single CAT 6 cable.

The kit includes a Transmitter and Receiver. The HDMI source connects to the Transmitter, the display connects to the Receiver, and a CAT 6 cable connects the Transmitter to the Receiver.

The UHD-EXB400UR-K supports HDMI 2.0b and HDCP 2.2, with a video bandwidth of 18Gbps. It supports video resolutions up to 4K@60Hz 4:4:4, HDR, HDR10, HDR10+, Dolby Vision, HLG, USB 2.0 transmission, bi-directional IR, bi-directional PoC, EDID management, and transmission distance up to 120m / 394ft at 4K@60Hz or 150m / 492ft at 1080p@60Hz over CAT 6 cable.

The UHD-EXB400UR-K is useful for conference rooms, classrooms, control rooms, video conferencing, USB camera setups, media rooms, offices, AV racks, and commercial AV installations where HDMI and USB 2.0 need to be extended together.

 

IMPORTANT — UHD-EXB400UR-K Supports 4K@60Hz 4:4:4

The UHD-EXB400UR-K supports video resolutions up to 4K@60Hz YUV 4:4:4.

This makes it suitable for HDMI 2.0 installations that need high-quality 4K video extension over long CAT cable distance.

To get 4K@60Hz, the source device, display, HDMI cables, and CAT 6 cable must all support the required signal quality.

 

IMPORTANT — Maximum Distance Depends on Resolution

The UHD-EXB400UR-K supports different extension distances depending on the video resolution.

Resolution CAT 6 Distance
1080p@60Hz Up to 150m / 492ft
4K@60Hz 4:4:4 Up to 120m / 394ft

For best performance, use a high-quality shielded CAT 6 cable.

 

IMPORTANT — Use a Direct CAT Cable Connection

The UHD-EXB400UR-K is an HDBaseT extender and should be connected directly from the Transmitter HDBT OUT port to the Receiver HDBT IN port.

Do not connect the extender through:

  1. Network switch
  2. Router
  3. Internet network
  4. LAN switch
  5. Ethernet wall network system used as a network path 
     
    This product is not an AV-over-IP extender. The CAT cable is used as a direct HDBaseT signal extension cable between the Transmitter and Receiver.

 

IMPORTANT — USB 2.0 Transmission Is Supported

The UHD-EXB400UR-K supports USB 2.0 transmission.

The Transmitter has a USB-B PC port that connects to the host computer.

The Receiver has two USB-A 2.0 ports for USB devices.

The manual notes that each USB 2.0 port supports a maximum output current of 500mA. If a connected USB device requires more power than 500mA, it may not work properly.

 

IMPORTANT — USB 2.0 Is Different From USB KVM-Only Models

Unlike USB 1.1 KVM-only extenders, this model supports USB 2.0 transmission.

This makes it more suitable for devices such as:

  1. Keyboard
  2. Mouse
  3. USB camera
  4. USB peripheral
  5. USB device within the 500mA power limit 
     
    For high-power USB devices, use a powered USB hub if needed.

 

IMPORTANT — Bi-Directional PoC Is Supported

The UHD-EXB400UR-K supports bi-directional PoC, meaning Power over Cable.

Only one 24V/1A locking power supply is included.

The power adapter can be connected to either:

  1. Transmitter
  2. Receiver 
     
    The other unit receives power through the CAT 6 cable.

 

IMPORTANT — Bi-Directional IR Control Is Supported

The UHD-EXB400UR-K supports bi-directional IR control.

This means IR signals can travel in both directions:

  1. Control the HDMI source from the Receiver/display side
  2. Control the display from the Transmitter/source side 
     
    The kit includes:
  3. IR Blaster cable
  4. IR Wideband Receiver cable 
     
    Make sure the IR Receiver cable connects to IR IN and the IR Blaster cable connects to IR OUT.

 

IMPORTANT — EDID Switch Has COPY and STD Modes

The Transmitter includes an EDID DIP switch.

EDID Mode Function
COPY Copies EDID from the Receiver HDMI OUT display
STD Uses default 1080p 2CH EDID

Use COPY when you want the source to follow the connected display.

Use STD for troubleshooting or when a stable 1080p stereo EDID is needed.

 

IMPORTANT — No HDMI Loop Out

The UHD-EXB400UR-K does not include HDMI loop out.

It has:

  1. HDMI IN on the Transmitter
  2. HDMI OUT on the Receiver 
     
    If a local display is needed near the HDMI source, use a separate HDMI splitter or choose an extender model with HDMI loop output.

 

IMPORTANT — No Separate Audio Extraction Output

The UHD-EXB400UR-K does not include Optical, Coaxial, RCA, or 3.5mm audio extraction.

Audio passes through HDMI to the connected display or HDMI audio device.

If separate audio extraction is needed, use an extender model with built-in audio output.

 

Ports and Panel Layout

Port / LED / Switch Unit Function
PWR LED Transmitter Red LED lights when the Transmitter is powered on
EDID DIP Switch Transmitter COPY copies Receiver display EDID; STD uses default 1080p 2CH EDID
SERVICE Transmitter Firmware update port
DC 24V Transmitter Connect the included 24V/1A power adapter if powering from Transmitter side
HDBT OUT Transmitter Connect CAT 6 cable to Receiver HDBT IN
Link Signal Indicator / Green Transmitter Shows connection status between Transmitter and Receiver
Data Signal Indicator / Yellow Transmitter Shows HDMI signal / HDCP status
HDMI IN Transmitter Connect HDMI source device such as DVD player, Blu-ray player, set-top box, or PC
IR IN Transmitter Connect IR Receiver cable
IR OUT Transmitter Connect IR Blaster cable
PC USB-B Port Transmitter Connect to PC for USB 2.0 transmission
Power LED Receiver Lights when the Receiver is powered on
SERVICE Receiver Firmware update port
DC 24V Receiver Connect the included 24V/1A power adapter if powering from Receiver side
HDBT IN Receiver Connect CAT 6 cable from Transmitter HDBT OUT
Link Signal Indicator / Green Receiver Shows connection status between Transmitter and Receiver
Data Signal Indicator / Yellow Receiver Shows HDMI signal / HDCP status
HDMI OUT Receiver Connect HDMI display such as TV or monitor
IR IN Receiver Connect IR Receiver cable
IR OUT Receiver Connect IR Blaster cable
USB 2.0 Ports x2 Receiver Connect USB 2.0 devices; max 500mA per port

 

Step-by-Step Setup

  1. Connect the HDMI source device to HDMI IN on the Transmitter. 
    Examples include a Blu-ray player, DVD player, set-top box, cable box, laptop, desktop PC, or media player.
  2. Connect the HDMI display to HDMI OUT on the Receiver. 
    Examples include a TV, monitor, projector, or commercial display.
  3. Connect HDBT OUT on the Transmitter to HDBT IN on the Receiver using CAT 6 cable.
  4. Connect the included 24V/1A locking power adapter to either the Transmitter or Receiver.
  5. Power on the HDMI source device and display.
  6. Set the EDID DIP switch:
    1. COPY to copy the Receiver display EDID
    2. STD for default 1080p 2CH EDID
  7. If using USB 2.0, connect the PC USB port to the Transmitter PC USB-B port using a USB cable.
  8. Connect USB 2.0 devices to the two USB-A ports on the Receiver.
  9. If using IR control, connect IR Receiver and IR Blaster cables based on the direction of control needed.
  10. Confirm the Power, Link, and Data indicators are active.
  11. Test video, audio, USB 2.0, and IR control.

 

CAT Cable Requirement — Critical

For best performance, use a high-quality CAT 6 cable.

Resolution Cable Type Distance
1080p@60Hz CAT 6 150m / 492ft
4K@60Hz 4:4:4 CAT 6 120m / 394ft

Poor-quality, damaged, or incorrectly terminated CAT cable may cause:

  1. No video
  2. Flickering
  3. Black screen
  4. Poor link status
  5. Link indicator flashing
  6. 4K@60Hz not working
  7. USB 2.0 devices not working
  8. Audio dropouts
  9. IR control issues
  10. PoC power issues 
     
    Do not connect the CAT cable through a network switch or router.

 

HDMI Cable Requirement — Critical

Use high-quality HDMI cables for the source and display.

Poor HDMI cables may cause:

  1. No picture
  2. Flickering
  3. Black screen
  4. 4K@60Hz not working
  5. HDR or Dolby Vision issues
  6. Audio dropouts
  7. HDCP handshake issues 
     
    For troubleshooting, test the HDMI source directly with the display before using the extender.

 

Understanding the Transmitter

The Transmitter is installed near the HDMI source device or PC.

It has:

  1. HDMI IN for the source
  2. HDBT OUT to connect to the Receiver
  3. USB-B PC port for USB 2.0 transmission
  4. IR IN and IR OUT for bi-directional IR
  5. EDID COPY / STD switch
  6. SERVICE firmware update port
  7. DC 24V power input
  8. Link and data signal indicators 
     
    The Transmitter can be powered directly or receive power through PoC from the Receiver.

 

Understanding the Receiver

The Receiver is installed near the remote display and USB devices.

It has:

  1. HDBT IN from the Transmitter
  2. HDMI OUT to the display
  3. Two USB 2.0 ports for USB devices
  4. IR IN and IR OUT for bi-directional IR
  5. SERVICE firmware update port
  6. DC 24V power input
  7. Link and data signal indicators 
     
    The Receiver can be powered directly or receive power through PoC from the Transmitter.

 

Understanding USB 2.0 Extension

The UHD-EXB400UR-K allows USB devices at the Receiver side to connect back to the host computer at the Transmitter side.

Basic USB setup:

Location Connection
Transmitter side PC connects to Transmitter PC USB-B port
Receiver side USB devices connect to Receiver USB 2.0 ports
Receiver side Display connects to HDMI OUT

This is useful when the computer is installed near the source equipment, but USB devices need to be used near the remote display.

 

Understanding USB Power Limit

Each USB 2.0 port on the Receiver supports up to 500mA.

If a USB device needs more than 500mA, it may not work.

For high-power USB devices, use a powered USB hub near the Receiver.

 

Understanding EDID COPY and STD

EDID tells the HDMI source what video and audio formats the connected display supports.

EDID Mode Best Used For
COPY When the source should follow the Receiver display capability
STD Troubleshooting or forcing a basic 1080p 2CH signal

If there is no video, wrong resolution, or audio compatibility issue, try STD mode and power cycle the source device.

 

Understanding Bi-Directional IR

Bi-directional IR allows remote control signals to travel in either direction between the Transmitter and Receiver.

Example 1: Control source from Receiver side

  1. Connect IR Receiver to IR IN on the Receiver
  2. Connect IR Blaster to IR OUT on the Transmitter
  3. Place IR Receiver near the display
  4. Place IR Blaster near the source device’s IR sensor 
     
    Example 2: Control display from Transmitter side
  5. Connect IR Receiver to IR IN on the Transmitter
  6. Connect IR Blaster to IR OUT on the Receiver
  7. Place IR Receiver near the source-side remote location
  8. Place IR Blaster near the display’s IR sensor 
     
    The supported IR frequency is 20kHz to 60kHz.

 

Understanding IR Receiver Distance

The manual lists IR receiver distance based on remote angle.

Remote Angle IR Distance
±45° 0–5m
±90° 0–8m

Place the IR Receiver where the remote control has clear line of sight.

 

Understanding Indicator Lights

The UHD-EXB400UR-K includes Link and Data indicators.

Indicator Status Meaning
Link Signal Indicator / Green Illuminating Transmitter and Receiver have good connection
Link Signal Indicator / Green Flashing Transmitter and Receiver have poor connection
Link Signal Indicator / Green Dark Transmitter and Receiver are not connected
Data Signal Indicator / Yellow Illuminating HDMI signal with HDCP
Data Signal Indicator / Yellow Flashing HDMI signal without HDCP
Data Signal Indicator / Yellow Dark No HDMI signal

Use these indicators when troubleshooting no video, poor connection, or HDMI handshake issues.

 

Understanding Firmware Update

Both the Transmitter and Receiver include SERVICE ports.

The SERVICE port is used for firmware update.

It is not needed for normal HDMI extension setup.

Use firmware updates only when provided by OREI support or from the product support page.

 

Supported Video and Audio

The UHD-EXB400UR-K supports video formats including:

Supported Video
4K@60Hz YUV 4:4:4
4K@30Hz
1080p@60Hz
RGB 4:4:4
YCbCr 4:4:4
YCbCr 4:2:2
YCbCr 4:2:0
HDR
HDR10
HDR10+
Dolby Vision
HLG

Supported color depth:

Resolution Color Depth
1080p 8-bit / 10-bit / 12-bit
4K@60Hz 8-bit
4K@24/30Hz 8-bit / 10-bit / 12-bit

Supported HDMI audio formats include:

Supported Audio
LPCM 7.1CH
Dolby TrueHD
DTS-HD Master Audio

The connected source, display, and audio device must also support the selected video and audio format.

 

What Source Devices Is the UHD-EXB400UR-K Compatible With?

The OREI UHD-EXB400UR-K is compatible with HDMI source devices such as:

  1. Desktop PCs
  2. Laptops with HDMI output
  3. Blu-ray players
  4. DVD players
  5. Cable boxes
  6. Satellite receivers
  7. Set-top boxes
  8. Media players
  9. HDMI matrix outputs
  10. DVRs
  11. NVRs 
     
    For USB 2.0 extension, the source computer must also be connected to the Transmitter PC USB-B port.

 

What Displays Is the UHD-EXB400UR-K Compatible With?

The UHD-EXB400UR-K can connect to HDMI displays such as:

  1. 4K TVs
  2. 1080p TVs
  3. Monitors
  4. Projectors
  5. Commercial displays
  6. Classroom displays
  7. Conference room displays
  8. Control room displays
  9. Monitoring displays 
     
    For 4K@60Hz, the connected display must support 4K@60Hz input.

 

What USB Devices Is the UHD-EXB400UR-K Compatible With?

The USB 2.0 ports can work with USB devices such as:

  1. Keyboard
  2. Mouse
  3. USB camera
  4. USB peripheral
  5. USB device within the 500mA per-port power limit 
     
    For USB devices that need more power, use a powered USB hub.

 

Frequently Asked Questions

Q: What is the OREI UHD-EXB400UR-K used for? 
A: The UHD-EXB400UR-K is used to extend HDMI video, audio, USB 2.0, and bi-directional IR over CAT 6 cable. It supports up to 4K@60Hz 4:4:4 and includes Power over Cable.

Q: Does the UHD-EXB400UR-K support 4K@60Hz? 
A: Yes. It supports video resolutions up to 4K@60Hz YUV 4:4:4.

Q: Does the UHD-EXB400UR-K support 8K? 
A: No. It supports up to 4K@60Hz.

Q: Does the UHD-EXB400UR-K 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.

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

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

Q: How far can it extend 4K@60Hz? 
A: It can extend 4K@60Hz 4:4:4 up to 120m / 394ft over CAT 6 cable.

Q: How far can it extend 1080p@60Hz? 
A: It can extend 1080p@60Hz up to 150m / 492ft over CAT 6 cable.

Q: What CAT cable should I use? 
A: Use high-quality CAT 6 cable.

Q: Can I connect it through a network switch or router? 
A: No. This is an HDBaseT extender and requires a direct CAT cable connection between the Transmitter and Receiver.

Q: Does it support Power over Cable? 
A: Yes. It supports bi-directional PoC, so the included 24V/1A power adapter can be connected to either the Transmitter or Receiver.

Q: Why is there only one power adapter? 
A: The extender supports PoC, so one unit can power the other through the CAT cable.

Q: Does the Transmitter have HDMI loop out? 
A: No. This model does not include HDMI loop out.

Q: Does it support USB 2.0? 
A: Yes. It supports USB 2.0 transmission.

Q: Where do I connect the PC for USB 2.0? 
A: Connect the computer’s USB port to the Transmitter PC USB-B port.

Q: Where do I connect USB devices? 
A: Connect USB devices to the two USB 2.0 ports on the Receiver.

Q: What is the maximum USB port current? 
A: Each USB 2.0 port supports up to 500mA. Devices requiring more power may not work.

Q: Can I use a USB camera with this extender? 
A: Yes, the manual application diagram shows a USB camera connected at the Receiver side. Make sure the camera works within USB 2.0 bandwidth and the 500mA power limit.

Q: Can I use USB storage drives with this extender? 
A: The model supports USB 2.0 devices, but high-power devices may require a powered USB hub.

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

Q: Which IR cable goes into IR IN? 
A: The IR Receiver cable connects to IR IN.

Q: Which IR cable goes into IR OUT? 
A: The IR Blaster cable connects to IR OUT.

Q: What IR frequency is supported? 
A: The manual lists wideband IR from 20kHz to 60kHz.

Q: What EDID modes are available? 
A: COPY copies the EDID from the Receiver HDMI OUT display. STD uses default 1080p 2CH EDID.

Q: Which EDID mode should I use? 
A: Use COPY for normal operation. Use STD for troubleshooting or when you need a basic 1080p 2CH signal.

Q: What audio formats are supported? 
A: The manual lists LPCM 7.1CH, Dolby TrueHD, and DTS-HD Master Audio.

Q: Does it have separate audio output? 
A: No. This model does not include Optical, Coaxial, RCA, or 3.5mm audio extraction. Audio passes through HDMI.

Q: What do the Link indicators mean? 
A: Illuminating means good connection, flashing means poor connection, and dark means the Transmitter and Receiver are not connected.

Q: What do the Data indicators mean? 
A: Illuminating means HDMI signal with HDCP, flashing means HDMI signal without HDCP, and dark means no HDMI signal.

Q: What are the SERVICE ports used for? 
A: The SERVICE ports are used for firmware update.

Q: What should I do if there is no video? 
A: Check the power adapter, confirm the CAT cable is directly connected, check Link and Data indicators, try STD EDID mode, test with a shorter CAT 6 cable, and test the HDMI source directly with the display.

Q: What should I do if 4K@60Hz does not work? 
A: Keep the CAT cable within 120m / 394ft, use high-quality CAT 6 cable, use HDMI cables that support 4K@60Hz, confirm the source and display support 4K@60Hz, and try COPY EDID mode.

Q: What should I do if USB does not work? 
A: Make sure the PC is connected to the Transmitter PC USB-B port, the USB device is connected to the Receiver USB 2.0 port, and the USB device does not exceed the 500mA power limit.

Q: What should I do if IR control does not work? 
A: Make sure the IR Receiver cable is connected to IR IN and the IR Blaster cable is connected to IR OUT. Place the IR Blaster near the device’s IR sensor.

Q: Does the UHD-EXB400UR-K need external power? 
A: Yes. Connect the included 24V/1A locking power supply to either the Transmitter or Receiver. The other unit receives power through the CAT cable.

 

 

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