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StarTech.com ST121HD20FXA2 4K HDMI over Fiber Extender Kit - 4K 60Hz - HDR - 3300ft Single Mode/1000ft Multimode LC Fiber - IR
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Product Features
Product Overview
The StarTech.com ST121HD20FXA2 4K HDMI over Fiber Extender Kit delivers professional-grade signal extension for Ultra HD 4K 60Hz video with 7.1-channel audio. This point-to-point solution transmits HDMI signals over optical fiber, supporting distances up to 3300 feet over Single Mode fiber or 1000 feet over Multimode fiber using a single LC/UPC strand.
Engineered for reliability in demanding AV installations, the extender kit maintains full 4:4:4 chroma subsampling and HDCP 2.2 compliance while being immune to electromagnetic interference. The metal-housed transmitter and receiver units include built-in mounting brackets for secure rack or surface installation in commercial, educational, or residential environments.
Relevant factors for this section include Connectivity Technology, Number of Input Devices Supported, Number of Output Devices Supported, Graphics Modes. When those points are considered together, they give buyers a clearer picture of how the product is equipped, how it fits into deployment, and what kind of day-to-day role it is meant to support.
Technical Overview
This HDMI 2.1-compliant extender kit supports 4K UHD resolution at 60Hz with HDR10 high dynamic range for enhanced contrast and color depth. The fiber optic transmission preserves signal integrity across extended distances without compression artifacts or latency issues that can affect copper-based extenders.
Audio flexibility includes simultaneous output through both HDMI and the receiver's 3.5mm audio jack, enabling separate audio distribution systems. EDID copy functionality ensures proper handshake between source and display devices, while LED status indicators provide at-a-glance monitoring of power, signal, and fiber link status.
Relevant factors for this section include Connectivity Technology, Number of Input Devices Supported, Number of Output Devices Supported, Graphics Modes. When those points are considered together, they give buyers a clearer picture of how the product is equipped, how it fits into deployment, and what kind of day-to-day role it is meant to support.
Key Product Advantages
This fiber-based HDMI extender eliminates the distance limitations and signal degradation concerns of traditional copper cabling while providing installation flexibility in environments with existing fiber infrastructure.
These strengths make the product easier to deploy and manage in real environments, especially where reliability, usability, and day-to-day operational continuity matter. Notable benefits include EMI Immunity, Installation Simplicity.
EMI Immunity
Optical fiber transmission is completely immune to electromagnetic interference, ensuring stable performance in electrically noisy environments near power lines, motors, or industrial equipment.
- No signal degradation from EMI/RFI
- Suitable for industrial applications
- Consistent performance in challenging environments
Installation Simplicity
The point-to-point connection requires no IP configuration, network equipment, or drivers, making setup straightforward for integrators of all experience levels.
- No software installation required
- Plug-and-play operation
- Built-in mounting brackets included
Deployment / Use Cases
The ST121HD20FXA2 extender kit is designed for professional AV installations where long-distance 4K signal transmission is required without compromising video quality. Its fiber-based approach makes it ideal for environments where copper cables would be impractical or susceptible to interference.
Common deployment scenarios include digital signage networks in large retail spaces or airports, lecture capture systems in educational institutions with distributed classrooms, and command center installations where control rooms are separated from display walls. The extender also supports residential home theater setups requiring signal distribution between media rooms and remote displays.
Corporate & Education
Extend 4K presentation signals from boardrooms to overflow seating areas or between buildings on campus networks using existing fiber infrastructure.
Broadcast & Production
Maintain signal integrity when routing 4K camera feeds over long distances in studio environments or outdoor event production setups.
What's in the Box
The kit includes everything needed for a complete point-to-point HDMI extension system over fiber optic cabling.
Highlights
- Extends 4K 60Hz HDMI signals up to 3300ft over Single Mode fiber or 1000ft over Multimode fiber
- Supports HDR10 high dynamic range and HDCP 2.2 content protection
- Delivers 7.1-channel audio with simultaneous HDMI and 3.5mm output
- Single strand LC/UPC fiber connector simplifies cabling requirements
- Point-to-point connection requires no IP configuration or network equipment
- Metal housing with built-in mounting brackets for secure installation
- IR/serial extension capabilities for remote control passthrough
- EDID copy functionality ensures proper device handshake
- Immune to electromagnetic interference for reliable performance
- Backed by a 2-year limited warranty and RoHS/REACH/WEEE compliance
Specifications
| Specifications | |
|---|---|
| Manufacturer | StarTech.com |
| Manufacturer Part Number | ST121HD20FXA2 |
| Brand Name | StarTech.com |
| Product Name | Video Extender Transmitter/Receiver |
| Product Type | Video Extender Transmitter/Receiver |
| Technical Information | |
| Connectivity Technology | Wired |
| Number of Input Devices Supported | 1 |
| Number of Output Devices Supported | 2 |
| Maximum Operating Distance | 3300 ft (1005840 mm) |
| Video | |
| Graphics Modes | 4K UHD |
| Interfaces/Ports | |
| HDMI In | Yes |
| HDMI Out | Yes |
| USB | Yes |
| Number of USB Ports | 2 |
| Number of HDMI Inputs | 1 |
| Number of HDMI Outputs | 2 |
| Media & Performance | |
| Media Type Supported | Optical Fiber |
| Miscellaneous | |
| Package Contents | 1 x Transmitter Unit 1 x Receiver Unit |
| Environmentally Friendly | Yes |
| Environmental Certification | EU RoHS |
| Environmental Compliance | Restriction of Hazardous Substances (RoHS) 2,Registration, Evaluation, Authorization and Restriction of Chemicals (REACH),Waste Electrical and Electronic Equipment Directive (WEEE) |
| Warranty | |
| Limited Warranty | 2 Year |
User Manual
FAQ
What types of fiber optic cable does this HDMI extender support?
The ST121HD20FXA2 supports both Single Mode and Multimode fiber optic cabling with LC/UPC connectors. It achieves maximum distances of 3300 feet (1 kilometer) over Single Mode fiber or 1000 feet (300 meters) over Multimode fiber using a single fiber strand for bidirectional communication.
Does this extender support 4K HDR content?
Yes, this HDMI extender fully supports 4K Ultra HD resolution at 60Hz with HDR10 high dynamic range. It maintains 4:4:4 chroma subsampling for accurate color reproduction and is HDCP 2.2 compliant for protected content playback from streaming services, Blu-ray players, and gaming consoles.
How many displays can I connect to a single source with this extender kit?
The receiver unit provides two HDMI outputs, allowing you to connect two displays to a single HDMI source. Both outputs receive the same 4K 60Hz signal simultaneously, making this ideal for digital signage applications or presentations requiring multiple synchronized displays.
What audio capabilities does this HDMI over fiber extender offer?
The extender supports 7.1-channel audio passthrough over HDMI and includes a 3.5mm audio output jack on the receiver unit for audio extraction. This allows simultaneous audio playback through both the connected display's speakers and a separate audio system, providing flexibility for different installation requirements.
Is this extender susceptible to electromagnetic interference?
No, because it uses fiber optic transmission rather than copper cables, this HDMI extender is completely immune to electromagnetic interference (EMI) and radio frequency interference (RFI). This makes it suitable for installations near electrical equipment, industrial machinery, or in environments with significant electrical noise.
What installation features make this extender kit suitable for professional AV setups?
The extender features durable metal housing with built-in mounting brackets for rack or surface installation, LED status indicators for monitoring power and signal status, IR/serial extension capabilities for remote control passthrough, and requires no IP configuration or network equipment. The point-to-point fiber connection simplifies setup while providing reliable long-distance signal transmission.
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