What Is the UHD-FO10LAR-K?
The OREI UHD-FO10LAR-K is a 4K@60Hz HDMI over fiber optic extender kit with HDMI loop out, 1G LAN pass-through, audio embedding / extraction, RS-232 pass-through, and scaler support on the Receiver. It extends HDMI video over fiber optic cable up to 10km using single-mode fiber or up to 300m using multi-mode fiber.
The kit includes one Transmitter, one Receiver, two 10G SFP+ optical fiber modules, two power adapters, mounting ears, Phoenix connectors, 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 the fiber cable connects between the SFP+ ports on both units.
The UHD-FO10LAR-K supports HDMI 2.0b and HDCP 2.2, with a video bandwidth of 18Gbps. It supports uncompressed 4K@60Hz video using SDVoE technology, zero video latency, HDR, Dolby Vision, HLG, LPCM 2.0 / 5.1 / 7.1, Dolby Digital, Dolby TrueHD, Dolby Atmos, DTS-HD MA, DTS:X, 1G LAN pass-through, RS-232 pass-through, and 3.5mm analog audio input/output for embedding and extraction.
The UHD-FO10LAR-K is useful for commercial AV, control rooms, campuses, houses of worship, conference rooms, auditoriums, command centers, medical spaces, education environments, and long-distance installations where reliable 4K@60Hz HDMI transmission over fiber is required.
IMPORTANT — UHD-FO10LAR-K Uses Fiber Optic Cable
The UHD-FO10LAR-K extends HDMI over fiber optic cable.
It does not use CAT cable for the main HDMI extension path.
| Connection | Function |
| Fiber cable | Main HDMI / AV signal extension |
| SFP+ module | Optical fiber connection module |
| 1G LAN port | Network pass-through |
| HDMI cable | Source to Transmitter and Receiver to display |
The included optical modules are designed for Transmitter and Receiver use.
IMPORTANT — Supports up to 10km Over Single-Mode Fiber
The UHD-FO10LAR-K supports long-distance fiber extension.
| Fiber Type | Maximum Distance |
| Single-mode optical fiber | Up to 10km |
| Multi-mode optical fiber | Up to 300m |
For best performance, use the correct fiber cable type and compatible SFP+ modules.
Poor fiber quality, wrong module placement, dirty fiber ends, incorrect fiber type, or damaged connectors may cause no video, flickering, signal loss, or link failure.
IMPORTANT — Supports 4K@60Hz
The UHD-FO10LAR-K supports video resolutions up to 4K@60Hz.
Supported video features include:
| Feature | Support |
| 4K@60Hz | Supported |
| 18Gbps bandwidth | Supported |
| HDMI 2.0b | Supported |
| HDCP 2.2 | Supported |
| SDVoE compression standard | Supported |
| Zero video latency | Supported |
| HDR | Supported |
| Dolby Vision | Supported |
| HLG | Supported |
To get 4K@60Hz, the HDMI source, display, HDMI cables, fiber cable, SFP+ modules, and source output settings must all support the required signal.
IMPORTANT — HDMI Loop Out Is on the Transmitter
The Transmitter includes HDMI OUT for loop output.
This allows a local display to be connected near the HDMI source.
| Port | Function |
| Transmitter HDMI IN | Connect HDMI source |
| Transmitter HDMI OUT | Connect local display |
| Receiver HDMI OUT | Connect remote display |
The HDMI loop out is useful for local monitoring, AV racks, control rooms, or installations where the source-side location also needs a display.
IMPORTANT — Receiver Has Scaler Support
The Receiver includes scaler support to match different display capabilities.
This helps when the remote display supports a different resolution than the source output.
Use the scaler when:
- The remote display does not show video
- The source outputs a resolution the display does not support
- Different displays are used between local and remote locations
- A lower output resolution is needed at the Receiver side
IMPORTANT — 1G LAN Pass-Through Is Supported
Both the Transmitter and Receiver include a 1G LAN port.
This allows network connectivity to pass through the fiber link without running an additional network cable.
Common uses include:
- Network device connection at the remote display side
- Control network extension
- PC / laptop network access
- Device management network extension
The 1G LAN port can also be used for RS-232 settings configuration through the control software.
IMPORTANT — RS-232 Pass-Through Is Supported
The UHD-FO10LAR-K supports RS-232 pass-through.
RS-232 can be used for:
- Display control
- Projector control
- Control processor integration
- Automation systems
- Connected device control
- Serial command extension between Transmitter and Receiver
Default RS-232 settings are:
| RS-232 Setting | Default |
| Baud rate | 57600 |
| Data bits | 8 |
| Parity | None |
| Stop bits | 1 |
The RS-232 settings can be changed using the 10G Fiber Extender Control Tool software.
IMPORTANT — Audio Embedding and Extraction Are Supported
The UHD-FO10LAR-K supports 3.5mm analog audio input/output on both Transmitter and Receiver.
| Audio Port | Function |
| AUDIO IN | Connect audio source device |
| AUDIO OUT | Connect audio output device such as headphones, soundbar, speaker, or amplifier |
This allows audio to be embedded or extracted depending on the setup.
Supported HDMI audio formats include:
- LPCM 2.0 / 5.1 / 7.1
- Dolby Digital
- Dolby Digital+
- Dolby TrueHD
- Dolby Atmos
- DTS 5.1
- DTS-HD Master Audio
- DTS:X
IMPORTANT — Included SFP+ Modules Are Direction-Specific
The package includes two optical fiber modules.
| Module | Use |
| SFP-BL23TG-10DC | Transmitter optical fiber module |
| SFP-BL23TC-10DC | Receiver optical fiber module |
Install the correct module in the correct unit.
If there is no video and the LINK / VIDEO LEDs are not lighting, check that the Transmitter and Receiver are connected to the correct optical modules.
IMPORTANT — Both Units Need Power
The UHD-FO10LAR-K includes two power adapters.
| Unit | Power Requirement |
| Transmitter | DC 12V/1A |
| Receiver | DC 12V/1A |
The power adapters are required for operation.
If either unit does not power on, check the power adapter, outlet, DC 12V connection, and power LED.
IMPORTANT — HDMI Cable Length Matters
The manual lists HDMI passive cable distance recommendations.
| Resolution | HDMI Cable Length |
| 4K60 | 16.4ft / 5m |
| 4K30 | 33ft / 10m |
| 1080p60 | 49ft / 15m |
Poor HDMI cables may cause:
- No video
- Flickering
- Black screen
- HDR issues
- HDCP handshake issues
- Audio dropouts
- Unstable 4K@60Hz performance
Use HDMI cables rated for 18Gbps when using 4K@60Hz.
Ports and Panel Layout
| Port / Indicator | Unit | Function |
| POWER LED | Transmitter | Lights when the unit is powered on |
| LINK LED | Transmitter | Lights when link is established with Receiver |
| VIDEO LED | Transmitter | On when HDMI input signal is detected and link is established; flashing when HDMI input signal is detected but link is not established |
| 1G LAN | Transmitter | Connect UTP cable for Ethernet transmission or RS-232 settings change |
| Data Signal Indicator | Transmitter | Flashing when data transmission is active; off when data transmission is inactive |
| Link Signal Indicator | Transmitter | On when network connection is established; off when network connection is not established |
| RS-232 | Transmitter | Connect PC, laptop, or controller for RS-232 command pass-through |
| AUDIO IN | Transmitter | Connect audio source device |
| AUDIO OUT | Transmitter | Connect audio output device |
| DC 12V | Transmitter | Connect included power adapter |
| RESET | Transmitter | Press and hold 5 seconds to reset to default settings |
| HDMI IN | Transmitter | Connect HDMI source device |
| HDMI OUT | Transmitter | Connect local display |
| SFP+ | Transmitter | Connect fiber optic cable using SFP+ module |
| POWER LED | Receiver | Lights when the unit is powered on |
| LINK LED | Receiver | Lights when link is established with Transmitter |
| VIDEO LED | Receiver | On when HDMI input signal is detected and link is established; flashing when HDMI input signal is detected but link is not established |
| 1G LAN | Receiver | Connect network device such as PC or internet application |
| Data Signal Indicator | Receiver | Flashing when data transmission is active; off when data transmission is inactive |
| Link Signal Indicator | Receiver | On when network connection is established; off when network connection is not established |
| RS-232 | Receiver | Connect PC, laptop, or controller for RS-232 command pass-through |
| AUDIO IN | Receiver | Connect audio source device |
| AUDIO OUT | Receiver | Connect audio output device |
| DC 12V | Receiver | Connect included power adapter |
| RESET | Receiver | Press and hold 5 seconds to reset to default settings |
| HDMI OUT | Receiver | Connect remote display |
| SFP+ | Receiver | Connect fiber optic cable using SFP+ module |
Step-by-Step Setup
- Install the correct SFP+ module into the Transmitter.
- Install the correct SFP+ module into the Receiver.
- Connect the HDMI source device to HDMI IN on the Transmitter.
- Connect a local display to HDMI OUT on the Transmitter if local monitoring is needed.
- Connect the remote display to HDMI OUT on the Receiver.
- Connect fiber optic cable between the Transmitter SFP+ port and Receiver SFP+ port.
- Connect the included DC 12V power adapter to the Transmitter.
- Connect the included DC 12V power adapter to the Receiver.
- If using LAN pass-through, connect the network cable to the 1G LAN ports.
- If using RS-232, connect RS-232 cables to the 4-pin Phoenix connectors.
- If using audio embedding or extraction, connect AUDIO IN and / or AUDIO OUT as needed.
- Power on the HDMI source, display, Transmitter, Receiver, and connected devices.
- Check the POWER, LINK, and VIDEO LEDs.
- Test video, audio, HDMI loop out, LAN pass-through, RS-232, and scaler function.
Fiber Cable Requirement — Critical
Use the correct fiber cable for the required distance.
| Fiber Type | Maximum Distance |
| Single-mode fiber | Up to 10km |
| Multi-mode fiber | Up to 300m |
Poor or incorrect fiber cable may cause:
- No video
- LINK LED not lighting
- VIDEO LED flashing
- Intermittent signal
- Black screen
- Dropouts
- Failed data transmission
- LAN pass-through failure
Keep fiber connectors clean and avoid bending the fiber cable beyond its safe bend radius.
HDMI Cable Requirement — Critical
Use high-quality HDMI cables.
| Resolution | Recommended HDMI Cable Length |
| 4K60 | 16.4ft / 5m |
| 4K30 | 33ft / 10m |
| 1080p60 | 49ft / 15m |
For 4K@60Hz, use HDMI cables rated for 18Gbps.
Power Requirement — Critical
Both units require DC 12V power.
| Unit | Power Supply |
| Transmitter | DC 12V/1A |
| Receiver | DC 12V/1A |
The package includes two power adapters.
The Transmitter power consumption is listed as 5.52W max, and the Receiver power consumption is listed as 5.04W max.
Understanding the Transmitter
The Transmitter is installed near the HDMI source.
It has:
- HDMI IN
- HDMI OUT loop output
- SFP+ fiber port
- 1G LAN port
- RS-232 port
- AUDIO IN
- AUDIO OUT
- DC 12V input
- RESET button
- POWER, LINK, and VIDEO LEDs
The Transmitter sends HDMI video, audio, LAN, and RS-232 over fiber to the Receiver.
Understanding the Receiver
The Receiver is installed near the remote display.
It has:
- HDMI OUT
- SFP+ fiber port
- 1G LAN port
- RS-232 port
- AUDIO IN
- AUDIO OUT
- DC 12V input
- RESET button
- POWER, LINK, and VIDEO LEDs
The Receiver outputs HDMI to the display and provides LAN, RS-232, and audio connections at the remote side.
Understanding the Application Example
The application diagram shows a laptop connected to the Transmitter by HDMI, a local TV connected through HDMI loop out, and the Receiver connected to a projector or remote display through HDMI. The diagram also shows fiber between the Transmitter and Receiver, LAN connection through a router, RS-232 cable, microphone/audio input, and speaker/audio output.
This setup demonstrates that the UHD-FO10LAR-K can extend HDMI video, LAN, RS-232 control, and audio over the fiber link.
Understanding LED Indicators
| Indicator | Status | Meaning |
| POWER LED On | Unit is powered on | |
| LINK LED On | Link is established between Transmitter and Receiver | |
| VIDEO LED On | HDMI signal is detected and link is established | |
| VIDEO LED Flashing | HDMI input signal is detected, but link is not established | |
| VIDEO LED Off | HDMI input signal is not detected | |
| Data Signal Indicator Flashing | Data transmission is active | |
| Data Signal Indicator Off | Data transmission is inactive | |
| Link Signal Indicator On | Network connection is established | |
| Link Signal Indicator Off | Network connection is not established |
Use these LEDs first when troubleshooting signal issues.
Supported Video and Audio
The UHD-FO10LAR-K supports video formats including:
| Supported Video |
| 480p |
| 720p |
| 1080p |
| 2K |
| 4K@24Hz |
| 4K@25Hz |
| 4K@30Hz |
| 4K@50Hz |
| 4K@59.94Hz |
| 4K@60Hz |
| 8-bit / 10-bit / 12-bit color depth |
| RGB |
| YCbCr 4:4:4 |
| YCbCr 4:2:2 |
| YUV 4:2:0 |
| HDR |
| Dolby Vision |
| HLG |
Supported audio formats include:
| Supported Audio |
| LPCM 2.0 / 5.1 / 7.1 |
| Dolby Digital |
| Dolby Digital+ |
| Dolby TrueHD |
| Dolby Atmos |
| DTS 5.1 |
| DTS-HD Master Audio |
| DTS:X |
Supported Technical Specifications
| Specification | Support |
| Product Type | 4K@60Hz HDMI over fiber extender |
| HDMI Version | HDMI 2.0b |
| HDCP Version | HDCP 2.2 |
| Video Bandwidth | 594MHz / 18Gbps |
| Video Compression Standard | SDVoE |
| Video Network Bandwidth | 10Gbps SFP+ |
| Maximum Resolution | 4K@60Hz |
| Output Video Resolution | Pass-through |
| Color Space | RGB, YCbCr 4:4:4 / 4:2:2, YUV 4:2:0 |
| Color Depth | 8 / 10 / 12-bit |
| HDR | HDR, Dolby Vision, HLG |
| Audio Latency | Zero latency |
| Video Latency | Zero latency |
| HDMI Audio | LPCM 2.0 / 5.1 / 7.1, Dolby Digital, Dolby Digital+, Dolby TrueHD, Dolby Atmos, DTS 5.1, DTS-HD Master Audio, DTS:X |
| Audio Sample Rate | 22.05 / 24 / 32 / 44.1 / 48 / 88.2 / 96 / 176.4 / 192kHz |
| HDMI Passive Cable Distance | 4K60: 16.4ft / 5m; 4K30: 33ft / 10m; 1080p60: 49ft / 15m |
| Single-Mode Fiber Distance | 10km |
| Multi-Mode Fiber Distance | 300m |
| LAN | 1G LAN pass-through |
| RS-232 | Pass-through supported |
| Transmitter HDMI Ports | HDMI IN and HDMI OUT loop out |
| Receiver HDMI Ports | HDMI OUT |
| SFP+ Modules | 2 included |
| Power Supply | DC 12V/1A, US/EU certified |
| Power Consumption | Transmitter 5.52W max; Receiver 5.04W max |
| Housing | Metal enclosure |
| Color | Black |
| Dimensions | 120mm x 95mm x 21.5mm |
| Weight | Transmitter 329g; Receiver 323g |
| Operating Temperature | 0°C to 40°C / 32°F to 104°F |
| Storage Temperature | -20°C to 60°C / -4°F to 140°F |
| Operating Humidity | 20%–80% RH, non-condensing |
| Storage Humidity | 10%–90% RH, non-condensing |
| ESD Protection | ±15kV air-gap, ±8kV contact |
What Source Devices Is the UHD-FO10LAR-K Compatible With?
The UHD-FO10LAR-K is compatible with HDMI source devices such as:
- Desktop PCs
- Laptops with HDMI output
- Blu-ray players
- Cable boxes
- Satellite receivers
- Streaming devices
- Media players
- DVRs
- NVRs
- HDMI matrix outputs
- HDMI switch outputs
- AV receivers with HDMI output
The source must output a supported HDMI resolution up to 4K@60Hz.
What Displays Is the UHD-FO10LAR-K Compatible With?
The UHD-FO10LAR-K can connect to HDMI displays such as:
- 4K TVs
- 1080p TVs
- Projectors
- Monitors
- Commercial displays
- Conference room displays
- Classroom displays
- Control room displays
- Auditorium displays
- Digital signage displays
For 4K@60Hz, the display must support 4K@60Hz input.
What Audio Devices Is the UHD-FO10LAR-K Compatible With?
The AUDIO IN and AUDIO OUT ports can connect to:
- Microphones
- Audio players
- Soundbars
- Amplifiers
- Speakers
- Headphones
- Audio processors
- Conference room audio systems
Use the 3.5mm analog audio ports for embedding or extracting analog audio.
Frequently Asked Questions
Q: What is the OREI UHD-FO10LAR-K used for?
A: The UHD-FO10LAR-K is used to extend 4K@60Hz HDMI video, audio, LAN, and RS-232 over fiber optic cable.
Q: Does the UHD-FO10LAR-K support 4K@60Hz?
A: Yes. It supports video resolutions up to 4K@60Hz.
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 594MHz / 18Gbps video bandwidth.
Q: What compression technology does it use?
A: It uses SDVoE technology.
Q: Is this zero latency?
A: Yes. The manual lists zero video latency and zero audio latency.
Q: How far can it extend over single-mode fiber?
A: It supports up to 10km over single-mode optical fiber.
Q: How far can it extend over multi-mode fiber?
A: It supports up to 300m over multi-mode optical fiber.
Q: Are SFP+ modules included?
A: Yes. The package includes two 10G SFP+ optical fiber modules.
Q: Are the SFP+ modules direction-specific?
A: Yes. SFP-BL23TG-10DC is for the Transmitter, and SFP-BL23TC-10DC is for the Receiver.
Q: Does the Transmitter have HDMI loop out?
A: Yes. The Transmitter has HDMI OUT for local display connection.
Q: What is HDMI loop out used for?
A: It allows a local display to be connected near the HDMI source without using a separate HDMI splitter.
Q: Does the Receiver have scaler support?
A: Yes. The Receiver supports video scaling to match display capabilities.
Q: Does it support LAN pass-through?
A: Yes. It supports 1G LAN pass-through.
Q: Does it support RS-232?
A: Yes. It supports RS-232 pass-through.
Q: What are the default RS-232 settings?
A: Baud rate 57600, data bits 8, parity none, and stop bits 1.
Q: Can RS-232 settings be changed?
A: Yes. The settings can be changed using the 10G Fiber Extender Control Tool software.
Q: Does it support audio embedding and extraction?
A: Yes. It supports 3.5mm analog audio input/output on both Transmitter and Receiver.
Q: What HDMI audio formats are supported?
A: It supports LPCM 2.0 / 5.1 / 7.1, Dolby Digital, Dolby Digital+, Dolby TrueHD, Dolby Atmos, DTS 5.1, DTS-HD Master Audio, and DTS:X.
Q: Does it support Dolby Atmos?
A: Yes. Dolby Atmos is listed as supported.
Q: Does it support Dolby Vision?
A: Yes. Dolby Vision is supported.
Q: Does it support HDR?
A: Yes. HDR and HLG are supported.
Q: What power supply does it use?
A: Each unit uses a DC 12V/1A power adapter.
Q: Do both units need power?
A: Yes. The Transmitter and Receiver both need power.
Q: What HDMI cable length is recommended?
A: The manual lists 16.4ft / 5m for 4K60, 33ft / 10m for 4K30, and 49ft / 15m for 1080p60.
Q: What should I do if video is flickering, dropping out, or intermittent?
A: Check for bent or damaged fiber cable, try changing the fiber cable, check if the loop output on the Transmitter has the same issue, and try a lower source resolution.
Q: What should I do if there is no video and LINK / VIDEO LEDs are not lighting?
A: Make sure the Transmitter and Receiver are connected to the correct optical modules. SFP-BL23TG-10DC is for the Transmitter, and SFP-BL23TC-10DC is for the Receiver. Then reset both units.
Q: What does the VIDEO LED flashing mean?
A: It means HDMI input signal is detected, but the link is not established.
Q: What does the LINK LED mean?
A: It lights when the link is established between the Transmitter and Receiver.
Q: What does the RESET button do?
A: Press and hold RESET for 5 seconds while the device is powered on. The LINK and VIDEO LEDs will flash together for about 1Hz, then the device resets to default settings.
Q: Does the UHD-FO10LAR-K need external power?
A: Yes. Connect the included DC 12V power adapters to both the Transmitter and Receiver.
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