How to transmit an HDMI signal over long distances? HDMI to fiber optic converter
Distance is the most common enemy of the HDMI signal. While short cables work well at home, in professional installations where distance is measured in hundreds of meters or kilometers, copper is no longer enough. The solution is the Spacetronik SPH-FO12 HDMI to fiber optic converter, which redefines the possibilities of Ultra HD signal transmission.
What is the Spacetronik SPH-FO12?
It is a professional set (TX transmitter and RX receiver) that enables lossless HDMI signal transmission using single-mode fiber optic (LC connector). The device converts the digital signal into light pulses, making it possible to overcome distance barriers unattainable for traditional cables.
What is an HDMI extender used for? Specific applications
Thanks to its range of up to 20 kilometers and complete immunity to electromagnetic interference, the SPH-FO12 is indispensable in:
- Monitoring (CCTV): Displaying video from an NVR recorder in a remote security room or office without delays.
- Business and Education: Transmitting presentations from a laptop to projectors in large lecture halls, conference rooms, and training centers.
- Digital Signage systems: Managing content on advertising screens in shopping centers, hotels, or railway stations from one central server room.
- Events and Live Broadcasts: Transmitting video from cameras to broadcast vans or big screens during outdoor events.
- Industry: Operation in halls with strong interference generated by machines.
Special features that make a difference
- Uncompressed image: Support for 4K@60Hz (4:4:4) guarantees crystal-clear sharpness and smooth motion.
- Full HDR support: HDR10, HDR10+, and Dolby Vision provide deep contrast and vivid colors.
- Audio Extractor: The 3.5 mm jack output allows audio to be extracted directly to external sound systems or a mixer.
- Safety and stability: Galvanic isolation protects connected devices from surges and atmospheric discharges.
- Plug & Play: No drivers and no complicated configuration – connect it and it works.
| Parameter | Value / Standard |
|---|---|
| Maximum resolution | 4096×2160 @ 60 Hz (Ultra HD 4K) |
| Transmission range | Up to 20 km (single-mode fiber optic LC) |
| HDMI / HDCP standard | HDMI 2.0 / HDCP 2.2 / 2.3 and 1.4 |
| Color sampling | 4:4:4 |
| Audio support | LPCM, DTS-HD, Dolby TrueHD, 7.1 ch |
| Additional functions | ALLM (low latency mode), CEC |
| Housing | Compact, metal (89×49×20 mm) |
Why is it worth choosing fiber optic transmission?
Unlike extenders over twisted pair (LAN), fiber optic is not susceptible to magnetic interference and voltage drops. By choosing the Spacetronik SPH-FO12, you invest in installation reliability – the image will not disappear at a crucial moment, and 4K quality will remain intact regardless of external conditions.
FAQ: Frequently asked questions
1. What is the maximum range of an HDMI cable without quality loss?
Standard copper HDMI cables usually transmit the signal without interference up to 5–10 meters. To send it farther, you need to use an active extender (over twisted pair) or a fiber optic converter (such as the SPH-FO12), which offers a range of up to 20 km.
2. What is the difference between an HDMI extender over twisted pair and a fiber optic converter?
- Over twisted pair (LAN): Uses an RJ45 cable, range usually up to 50–100 m, susceptible to electromagnetic interference.
- Over fiber optic: Uses glass fibers, range measured in kilometers, complete immunity to interference and storms (galvanic isolation).
3. Does an HDMI converter introduce delays (input lag)?
Good-quality converters operating at the hardware level (Plug & Play) introduce delays that are imperceptible to the eye (often below 1ms). This is crucial in gaming, live broadcasts, and remote computer operation.
4. Does every HDMI converter support 4K 60Hz resolution?
No. Many cheaper models support only 4K at 30Hz or Full HD (1080p). To achieve full smoothness (60 frames per second), the converter must support the HDMI 2.0 standard and have adequate bandwidth (e.g. the SPH-FO12 model).
5. What is HDCP and why must the converter support it?
HDCP is a content protection system against copying. If your converter does not support HDCP 2.2/2.3, you will not display video from streaming platforms (Netflix, HBO, Disney+) or modern consoles (PS5, Xbox), even though the cable is connected.
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