What Is the UHD-EXB230AR-K?
The OREI UHD-EXB230AR-K is an 18Gbps HDMI over HDBaseT extender kit with ARC, bi-directional IR, RS-232 pass-through, and PoC. It extends HDMI video, audio, ARC audio, IR control, and RS-232 control up to 70m / 230ft over a single CAT5e / CAT6 cable.
The kit includes one Transmitter, one Receiver, one IR Blaster cable, one IR Wideband Receiver cable, two 3-pin Phoenix connectors, mounting ears, screws, one 24V/1A locking power adapter, and a user manual. The HDMI source connects to HDMI IN on the Transmitter, the remote display connects to HDMI OUT on the Receiver, and a CAT5e / CAT6 cable connects HDBT OUT on the Transmitter to HDBT IN on the Receiver.
The UHD-EXB230AR-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, ARC, optical audio input/output, advanced EDID management, bi-directional IR, RS-232 pass-through, and bi-directional PoC. It extends HDMI up to 70m / 230ft over a single CAT5e / CAT6 cable.
The UHD-EXB230AR-K is useful for home theaters, conference rooms, classrooms, AV racks, projector setups, display installations, multimedia broadcasting, and setups where HDMI video and ARC audio need to be extended between a source, display, and audio system.
IMPORTANT — UHD-EXB230AR-K Is an HDBaseT Extender with ARC
The UHD-EXB230AR-K extends one HDMI source to one HDMI display.
| Function | Support |
| 1 HDMI input | Supported |
| 1 HDMI output | Supported |
| HDBaseT extension | Supported |
| ARC audio return | Supported |
| Optical audio input/output | Supported |
| Bi-directional IR | Supported |
| RS-232 pass-through | Supported |
| PoC | Supported |
| Multiple displays | Not supported by itself |
| Matrix switching | Not supported |
This product is not a splitter or matrix. It extends one HDMI signal from the Transmitter to the Receiver.
IMPORTANT — Supports 4K@60Hz 4:4:4
The UHD-EXB230AR-K supports video resolutions up to 4K@60Hz 4:4:4.
| Feature | Support |
| 4K@60Hz 4:4:4 | Supported |
| HDMI 2.0b | Supported |
| HDCP 2.2 | Supported |
| Video bandwidth | 18Gbps |
| HDR | Supported |
| HDR10 | Supported |
| HDR10+ | Supported |
| Dolby Vision | Supported |
| HLG | Supported |
To get 4K@60Hz 4:4:4, the HDMI source, display, HDMI cables, CAT cable, and EDID settings must all support the required signal.
IMPORTANT — Maximum Distance Is 70m / 230ft
The UHD-EXB230AR-K extends HDMI up to 70m / 230ft over a single CAT5e / CAT6 cable.
| Cable Type | Maximum Distance |
| CAT5e / CAT6 | Up to 70m / 230ft |
For best performance, use high-quality CAT6 cable with proper termination.
Poor cable quality, damaged connectors, weak terminations, couplers, wall plates, patch panels, or low-quality CAT cable may cause no video, flickering, black screen, ARC issues, IR issues, or RS-232 problems.
IMPORTANT — Use Direct CAT Cable Connection
Connect HDBT OUT on the Transmitter directly to HDBT IN on the Receiver using CAT5e / CAT6 cable.
Do not connect the HDBaseT cable through:
- Network switch
- Router
- Internet network
- LAN switch
- Standard Ethernet network
This is an HDBaseT extender, not an AV-over-IP system.
IMPORTANT — ARC Function Is Supported
The UHD-EXB230AR-K supports ARC audio return.
ARC allows audio from the TV side to return back to the source/audio side.
The Receiver has an AUDIO DIP switch with two modes:
| Receiver AUDIO DIP Mode | Function |
| HDMI ARC | Audio returned from Receiver HDMI OUT is output through Transmitter HDMI IN and Transmitter SPDIF OUT |
| SPDIF IN | Audio from Receiver SPDIF IN is output through Transmitter HDMI IN and Transmitter SPDIF OUT |
When HDMI IN on the Transmitter is connected to a device with ARC support, such as an amplifier or soundbar, the ARC function can be enabled.
IMPORTANT — Optical Audio Input and Output Are Included
The UHD-EXB230AR-K includes optical audio ports.
| Optical Port | Location | Function |
| SPDIF OUT | Transmitter | Optical audio output |
| SPDIF IN | Receiver | Optical audio input |
The manual lists optical audio support for Dolby 5.1, DTS 5.1, and PCM 2.0.
This is useful when audio needs to be returned from the display side back to the source/audio equipment side.
IMPORTANT — ARC Audio Format Support
The ARC / optical audio function supports common compressed surround formats.
| Audio Type | Supported Formats |
| ARC / Optical | Dolby 5.1 |
| ARC / Optical | DTS 5.1 |
| ARC / Optical | PCM 2.0 |
For best compatibility, set the TV audio output to PCM 2.0, Dolby Digital 5.1, or DTS 5.1.
IMPORTANT — HDMI Audio Pass-Through Is Supported
The UHD-EXB230AR-K supports HDMI audio pass-through.
Supported HDMI audio formats include:
- LPCM 7.1CH
- Dolby TrueHD
- DTS-HD Master Audio
The connected HDMI source, display, AVR, soundbar, or audio system must also support the selected audio format.
IMPORTANT — Bi-Directional IR Is Supported
The UHD-EXB230AR-K supports bi-directional IR control.
This allows IR control in both directions:
| IR Direction | Use Case |
| Receiver side to Transmitter side | Control the HDMI source from the display side |
| Transmitter side to Receiver side | Control the display from the source side |
Typical source-control setup:
- Connect the IR Receiver cable to IR IN on the Receiver.
- Place the IR Receiver near the remote display.
- Connect the IR Blaster cable to IR OUT on the Transmitter.
- Place the IR Blaster near the HDMI source device’s IR window.
Typical display-control setup:
- Connect the IR Receiver cable to IR IN on the Transmitter.
- Connect the IR Blaster cable to IR OUT on the Receiver.
- Place the IR Blaster near the display’s IR window.
The supported IR frequency range is 20kHz to 60kHz.
IMPORTANT — RS-232 Pass-Through Is Supported
The UHD-EXB230AR-K supports RS-232 command transmission between the Transmitter and Receiver.
| RS-232 Feature | Support |
| RS-232 on Transmitter | Supported |
| RS-232 on Receiver | Supported |
| 3-pin Phoenix connector | Supported |
| Command pass-through | Supported |
RS-232 can be used for:
- Display control
- Projector control
- Control processor integration
- Automation systems
- Serial command pass-through
- HDMI matrix control workflows
IMPORTANT — PoC Is Supported
The UHD-EXB230AR-K supports bi-directional PoC.
Only one side needs the included 24V/1A locking power adapter.
| Power Setup | Support |
| Power Transmitter only | Supported |
| Power Receiver only | Supported |
| Power both units | Not required |
| Included power adapter | 24V/1A locking power adapter |
If either the Transmitter or Receiver is connected to the 24V/1A power supply, the other unit can receive power through the CAT cable.
IMPORTANT — EDID Management Is Included
The Transmitter includes an EDID DIP switch for audio EDID settings.
| EDID Mode | Function |
| COPY | Copies the EDID of the Receiver HDMI OUT port |
| STD | Default 1080p 2CH |
The manual lists COPY as the default mode.
Use EDID settings when there is no video, no audio, wrong resolution, or HDMI handshake issues.
IMPORTANT — No HDMI Loop Out Listed
The UHD-EXB230AR-K manual lists HDMI IN on the Transmitter and HDMI OUT on the Receiver.
It does not list HDMI loop out on the Transmitter.
| Unit | HDMI Port |
| Transmitter | HDMI IN |
| Receiver | HDMI OUT |
If a local display is needed near the source, use an HDMI splitter before the Transmitter or choose an extender model with HDMI loop out.
Ports and Panel Layout
| Port / Switch / Indicator | Unit | Function |
| POWER LED | Transmitter | Red LED turns on when Transmitter is powered |
| EDID DIP switch | Transmitter | COPY or STD audio EDID setting |
| SERVICE | Transmitter | Firmware update port |
| DC 24V | Transmitter | Connect 24V/1A power adapter if powering from Transmitter side |
| HDBT OUT | Transmitter | Connect CAT5e / CAT6 cable to Receiver HDBT IN |
| Link Signal Indicator | Transmitter | Shows HDBaseT connection status |
| Data Signal Indicator | Transmitter | Shows HDMI / HDCP signal status |
| HDMI IN | Transmitter | Connect HDMI source device |
| SPDIF OUT | Transmitter | Optical audio output |
| IR IN | Transmitter | Connect IR Receiver cable |
| IR OUT | Transmitter | Connect IR Blaster cable |
| RS-232 | Transmitter | 3-pin Phoenix connector for RS-232 pass-through |
| POWER LED | Receiver | Red LED turns on when Receiver is powered |
| AUDIO DIP switch | Receiver | Select HDMI ARC or SPDIF IN audio return mode |
| SERVICE | Receiver | Firmware update port |
| DC 24V | Receiver | Connect 24V/1A power adapter if powering from Receiver side |
| HDBT IN | Receiver | Connect CAT5e / CAT6 cable from Transmitter |
| Link Signal Indicator | Receiver | Shows HDBaseT connection status |
| Data Signal Indicator | Receiver | Shows HDMI / HDCP signal status |
| HDMI OUT | Receiver | Connect HDMI display |
| SPDIF IN | Receiver | Optical audio input |
| IR IN | Receiver | Connect IR Receiver cable |
| IR OUT | Receiver | Connect IR Blaster cable |
| RS-232 | Receiver | 3-pin Phoenix connector for RS-232 pass-through |
Step-by-Step Setup
- Connect the HDMI source device to HDMI IN on the Transmitter.
Examples include a Blu-ray player, cable box, streaming device, media player, laptop, desktop PC, HDMI matrix, amplifier, or soundbar with ARC support. - Connect HDBT OUT on the Transmitter to HDBT IN on the Receiver using CAT5e / CAT6 cable.
- Connect HDMI OUT on the Receiver to the remote TV, monitor, projector, or display.
- Connect the included 24V/1A locking power adapter to either the Transmitter or Receiver.
- Set the EDID DIP switch to COPY or STD depending on the installation requirement.
- If using ARC from the display side, connect the TV to Receiver HDMI OUT and set the Receiver AUDIO DIP switch to HDMI ARC.
- If using optical audio return from the Receiver side, connect optical audio to SPDIF IN on the Receiver and set the Receiver AUDIO DIP switch to SPDIF IN.
- Connect SPDIF OUT on the Transmitter to an audio amplifier, soundbar, AVR, or audio system if optical audio output is needed.
- If using source control from the display side, connect IR Receiver to Receiver IR IN and IR Blaster to Transmitter IR OUT.
- If using display control from the source side, connect IR Receiver to Transmitter IR IN and IR Blaster to Receiver IR OUT.
- If using RS-232, connect Phoenix RS-232 cables to the Transmitter and Receiver.
- Power on the HDMI source, display, Transmitter, Receiver, and audio/control devices.
- Check the POWER LEDs, Link Signal Indicators, and Data Signal Indicators.
- Test video, HDMI audio, ARC / optical audio return, IR control, RS-232, and PoC.
CAT Cable Requirement — Critical
Use high-quality CAT5e / CAT6 cable.
| Requirement | Specification |
| Cable type | CAT5e / CAT6 |
| Maximum distance | Up to 70m / 230ft |
| Connection | Transmitter HDBT OUT to Receiver HDBT IN |
Poor CAT cable may cause:
- No video
- Flickering
- Black screen
- Poor HDBaseT link
- ARC audio issues
- Optical audio return issues
- IR control issues
- RS-232 issues
- PoC power issues
Use a direct cable run whenever possible.
HDMI Cable Requirement — Critical
Use high-quality HDMI cables, especially for 4K@60Hz 4:4:4.
Poor HDMI cables may cause:
- No picture
- Flickering
- Black screen
- HDR issues
- HDCP handshake issues
- Audio dropouts
- ARC not working
- Display not detected
For troubleshooting, test the HDMI source directly with the display before using the extender.
Optical Cable Requirement — Critical
Use a good-quality optical Toslink cable when using SPDIF IN or SPDIF OUT.
Poor optical cables may cause:
- No audio
- Audio dropouts
- Dolby / DTS audio issues
- Intermittent optical signal
Make sure the optical cable is fully inserted and the audio format is supported by the connected audio device.
Power Requirement — Critical
The UHD-EXB230AR-K uses one DC 24V/1A locking power adapter.
| Unit | Power |
| Transmitter | DC 24V/1A, or powered through PoC |
| Receiver | DC 24V/1A, or powered through PoC |
| Power Detail | Value |
| Power adapter | DC 24V/1A |
| Power consumption | 9.6W max |
| PoC | Bi-directional |
Only one side normally needs power because PoC powers the other unit through the CAT cable.
Understanding the Transmitter
The Transmitter is installed near the HDMI source or audio equipment.
It has:
- HDMI IN
- HDBT OUT
- SPDIF OUT
- EDID DIP switch
- IR IN and IR OUT
- RS-232
- SERVICE firmware port
- DC 24V input
- POWER LED
- Link Signal Indicator
- Data Signal Indicator
The Transmitter sends HDMI, IR, RS-232, and power over CAT cable to the Receiver. It can also output returned ARC / optical audio through SPDIF OUT.
Understanding the Receiver
The Receiver is installed near the remote display.
It has:
- HDBT IN
- HDMI OUT
- SPDIF IN
- AUDIO DIP switch
- IR IN and IR OUT
- RS-232
- SERVICE firmware port
- DC 24V input
- POWER LED
- Link Signal Indicator
- Data Signal Indicator
The Receiver converts the HDBaseT signal back to HDMI and can send ARC or SPDIF audio back to the Transmitter.
Understanding ARC Mode
Use HDMI ARC mode when the TV connected to the Receiver supports ARC and you want TV audio to return to the source/audio side.
Basic ARC setup:
| Device | Connection |
| ARC-capable source/audio device | Transmitter HDMI IN |
| TV ARC-compatible HDMI port | Receiver HDMI OUT |
| Audio return output | Transmitter HDMI IN and SPDIF OUT |
| Receiver AUDIO DIP | HDMI ARC |
This allows audio returned from the Receiver HDMI OUT port to output through the Transmitter HDMI IN and SPDIF OUT.
Understanding SPDIF IN Mode
Use SPDIF IN mode when the audio return source is optical audio from the Receiver side.
Basic SPDIF setup:
| Device | Connection |
| Optical audio source at display side | Receiver SPDIF IN |
| Optical audio output at source side | Transmitter SPDIF OUT |
| Receiver AUDIO DIP | SPDIF IN |
This allows audio from the Receiver SPDIF IN port to output through the Transmitter SPDIF OUT and HDMI IN path.
Understanding EDID
EDID tells the HDMI source what video and audio format to output.
| EDID Mode | Best Use |
| COPY | Use the Receiver display’s EDID |
| STD | Force default 1080p 2CH |
Use COPY for normal installations where the display should determine the source output.
Use STD when troubleshooting compatibility issues or when a stable 1080p 2CH signal is preferred.
Understanding Signal Indicators
| Indicator | Status | Meaning |
| Link Signal Indicator illuminated | Transmitter and Receiver are in good connection status | |
| Link Signal Indicator flashing | Transmitter and Receiver are in poor connection status | |
| Link Signal Indicator dark | Transmitter and Receiver are not connected | |
| Data Signal Indicator illuminated | HDMI signal with HDCP | |
| Data Signal Indicator flashing | HDMI signal without HDCP | |
| Data Signal Indicator dark | No HDMI signal |
Use these indicators first when troubleshooting video, CAT cable, and HDCP issues.
Supported Video and Audio
The UHD-EXB230AR-K supports video formats including:
| Supported Video |
| Up to 4K@60Hz 4:4:4 |
| RGB |
| YCbCr 4:4:4 |
| YCbCr 4:2:2 |
| HDR |
| HDR10 |
| HDR10+ |
| Dolby Vision |
| HLG |
| 8-bit color at 4K60 |
| 8-bit / 10-bit / 12-bit color at 4K24/30 |
| 8-bit / 10-bit / 12-bit color at 1080p |
Supported audio formats include:
| Audio Type | Supported Format |
| HDMI Audio | LPCM 7.1CH, Dolby TrueHD, DTS-HD Master |
| Optical / ARC Audio | Dolby 5.1, DTS 5.1, PCM 2.0 |
Supported Technical Specifications
| Specification | Support |
| Product Type | 18Gbps HDBaseT extender with ARC |
| HDMI Version | HDMI 2.0b |
| HDCP Version | HDCP 2.2 |
| Video Bandwidth | 18Gbps |
| Maximum Resolution | 4K@60Hz RGB / YCbCr 4:4:4 |
| HDR | HDR, HDR10, HDR10+, Dolby Vision, HLG |
| Color Space | RGB, YCbCr 4:4:4, YCbCr 4:2:2 |
| Color Depth | 8-bit at 4K60; 8/10/12-bit at 1080p and 4K24/30 |
| HDMI Audio | LPCM 7.1CH, Dolby TrueHD, DTS-HD Master |
| Optical Audio | Dolby 5.1, DTS 5.1, PCM 2.0 |
| ARC | Supported |
| EDID | COPY / STD audio EDID setting |
| IR | Bi-directional IR |
| IR Level | 5Vp-p |
| IR Frequency | 20kHz–60kHz |
| RS-232 | Pass-through supported |
| PoC | Bi-directional PoC |
| CAT Cable | CAT5e / CAT6 |
| Transmission Distance | Up to 70m / 230ft |
| Transmitter Input | HDMI IN |
| Transmitter Outputs | HDBT OUT, SPDIF OUT |
| Transmitter Control | IR IN, IR OUT, RS-232, SERVICE |
| Receiver Inputs | HDBT IN, SPDIF IN |
| Receiver Output | HDMI OUT |
| Receiver Control | IR IN, IR OUT, RS-232, SERVICE |
| Power Supply | DC 24V/1A |
| Power Consumption | 9.6W max |
| Housing | Metal enclosure |
| Color | Black |
| Dimensions | Transmitter / Receiver: 140mm x 65mm x 18mm |
| Weight | Transmitter 235g; Receiver 239g |
| Operating Temperature | 32°F to 104°F / 0°C to 40°C |
| Storage Temperature | -4°F to 140°F / -20°C to 60°C |
| Relative Humidity | 20–90% RH, non-condensing |
What Source Devices Is the UHD-EXB230AR-K Compatible With?
The UHD-EXB230AR-K is compatible with HDMI source devices such as:
- Blu-ray players
- DVD players
- Cable boxes
- Satellite receivers
- Streaming devices
- Media players
- Desktop PCs
- Laptops with HDMI output
- DVRs
- NVRs
- HDMI matrix outputs
- HDMI switch outputs
- AV receivers
- Amplifiers or soundbars with ARC support
The source must output a supported HDMI resolution up to 4K@60Hz.
What Displays Is the UHD-EXB230AR-K Compatible With?
The UHD-EXB230AR-K can connect to HDMI displays such as:
- 4K TVs
- 1080p TVs
- Projectors
- Monitors
- Commercial displays
- Conference room displays
- Classroom displays
- Digital signage displays
- Control room displays
- ARC-compatible TVs
For ARC use, the connected TV and audio device must support ARC and the required audio format.
What Audio Devices Is the UHD-EXB230AR-K Compatible With?
The UHD-EXB230AR-K can connect with audio devices such as:
- AV receivers
- Soundbars
- Audio amplifiers
- Optical audio receivers
- Audio processors
- Speaker systems with optical input
- ARC-compatible audio devices
Use SPDIF OUT on the Transmitter when optical audio output is needed from ARC or SPDIF return.
Frequently Asked Questions
Q: What is the OREI UHD-EXB230AR-K used for?
A: It is used to extend HDMI video/audio, ARC audio return, IR, RS-232, and power over a single CAT5e / CAT6 cable using HDBaseT.
Q: Does the UHD-EXB230AR-K support 4K@60Hz?
A: Yes. It supports 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.
Q: What video bandwidth does it support?
A: It supports 18Gbps video bandwidth.
Q: Does it support HDR?
A: Yes. It supports HDR, HDR10, HDR10+, Dolby Vision, and HLG.
Q: How far can it extend HDMI?
A: It extends HDMI up to 70m / 230ft over a single CAT5e / CAT6 cable.
Q: What CAT cable should I use?
A: Use high-quality CAT5e or CAT6 cable.
Q: Can I connect it through a network switch?
A: No. Connect the Transmitter directly to the Receiver using CAT cable.
Q: Is this AV over IP?
A: No. It is an HDBaseT extender.
Q: Does the Transmitter have HDMI loop out?
A: No HDMI loop output is listed for this model.
Q: Does it support ARC?
A: Yes. ARC is supported.
Q: What does ARC do on this extender?
A: ARC allows audio from the TV/display side to return back to the source/audio equipment side through the extender system.
Q: Which ARC audio formats are supported?
A: The manual lists Dolby 5.1, DTS 5.1, and PCM 2.0 for ARC / optical audio.
Q: Does it support Dolby Atmos through ARC?
A: Dolby Atmos is not listed for ARC on this model.
Q: Does it support HDMI audio pass-through?
A: Yes. HDMI audio supports LPCM 7.1CH, Dolby TrueHD, and DTS-HD Master.
Q: Does the Transmitter have optical audio output?
A: Yes. The Transmitter has SPDIF OUT.
Q: Does the Receiver have optical audio input?
A: Yes. The Receiver has SPDIF IN.
Q: What does the Receiver AUDIO DIP switch do?
A: It selects whether the returned audio comes from HDMI ARC or from Receiver SPDIF IN.
Q: When should I use HDMI ARC mode?
A: Use HDMI ARC mode when the display connected to Receiver HDMI OUT sends audio back through ARC.
Q: When should I use SPDIF IN mode?
A: Use SPDIF IN mode when an optical audio source is connected to the Receiver SPDIF IN port.
Q: Does it support IR control?
A: Yes. It supports bi-directional IR control.
Q: What IR frequency is supported?
A: It supports wideband IR from 20kHz to 60kHz.
Q: What is the IR receiving distance?
A: The manual lists 0–5m at ±45° and 0–8m at ±90° between the IR Receiver and remote control.
Q: Which IR cable goes where for source control?
A: Connect the IR Receiver to Receiver IR IN and the IR Blaster to Transmitter IR OUT.
Q: Which IR cable goes where for display control?
A: Connect the IR Receiver to Transmitter IR IN and the IR Blaster to Receiver IR OUT.
Q: Does it support RS-232?
A: Yes. It supports RS-232 command pass-through.
Q: Does it support PoC?
A: Yes. It supports bi-directional Power over Cable.
Q: Do both units need power adapters?
A: No. Only one side needs the included 24V/1A power adapter because PoC powers the other side through CAT cable.
Q: Can the power adapter connect to either Transmitter or Receiver?
A: Yes. Either unit can be powered, and the other unit can receive power through PoC.
Q: What power adapter is included?
A: The package includes one 24V/1A locking power adapter.
Q: Does it support EDID management?
A: Yes. The Transmitter has an EDID DIP switch with COPY and STD modes.
Q: What is COPY EDID mode?
A: COPY mode copies the EDID of the HDMI OUT port on the Receiver.
Q: What is STD EDID mode?
A: STD mode uses default 1080p 2CH audio/video EDID.
Q: What should I do if there is no video?
A: Check the power adapter, HDMI source, HDMI cables, CAT cable, display input, EDID setting, Link Signal Indicator, and Data Signal Indicator.
Q: What should I do if the Link Signal Indicator is flashing?
A: The Transmitter and Receiver are in poor connection status. Check CAT cable quality, terminations, cable length, and direct connection.
Q: What should I do if the Link Signal Indicator is dark?
A: The Transmitter and Receiver are not connected. Check that HDBT OUT is connected directly to HDBT IN.
Q: What should I do if the Data Signal Indicator is dark?
A: No HDMI signal is detected. Check the HDMI source, HDMI cable, and source output setting.
Q: What should I do if the Data Signal Indicator is flashing?
A: HDMI signal is detected without HDCP. Check source, display, and HDCP compatibility.
Q: What should I do if 4K@60Hz does not work?
A: Use HDMI cables rated for 18Gbps, use high-quality CAT5e / CAT6 cable within 70m / 230ft, confirm the source and display support 4K@60Hz, and test with a lower resolution.
Q: What should I do if ARC audio does not work?
A: Confirm the TV and audio device support ARC, use the correct HDMI ARC port, set the Receiver AUDIO DIP switch to HDMI ARC, enable ARC/CEC on the TV, and use a supported audio format such as PCM 2.0, Dolby 5.1, or DTS 5.1.
Q: What should I do if optical audio does not work?
A: Check SPDIF IN on the Receiver, SPDIF OUT on the Transmitter, set the Receiver AUDIO DIP switch to SPDIF IN, and confirm the connected audio device supports the selected audio format.
Q: What should I do if IR control does not work?
A: Confirm the IR Receiver and IR Blaster cables are connected in the correct direction and that the IR Blaster is placed near the controlled device’s IR sensor.
Q: What should I do if RS-232 does not work?
A: Check Phoenix connector wiring, TxD / RxD / GND connection, serial settings, and the connected control devices on both ends.
Q: Does the UHD-EXB230AR-K need external power?
A: Yes. Connect the included DC 24V/1A locking power adapter to either the Transmitter or Receiver. The other unit can be powered through PoC.
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