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Broadcast quality SDI video Extenders - All of them at Avacab

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SDI Video Extenders: Extend Your Horizons in Professional Video Transmission
   
In the world of professional audiovisual production, video signal quality and reliability are paramount. SDI (Serial Digital Interface) video extenders are essential devices that allow you to overcome the distance limitations of standard SDI cables, ensuring the transmission of high-quality video over considerably greater distances without signal loss or degradation.
     

What is an SDI Video Extender?

An SDI video extender is a device designed to amplify and retransmit digital SDI video signals, allowing them to travel far beyond the maximum distances supported by a single coaxial cable. This is essential in environments where cameras, switchers, monitors, or recorders are located at a considerable distance, such as in television studios, live events, fixed installations, or film productions.
   

Types of SDI Video Extenders

There are primarily two types of SDI video extenders, differentiated by the transmission medium they use:
       
SDI Extenders over Coaxial Cable (Active):
Description: These extenders use existing SDI coaxial cables but incorporate active circuitry to regenerate and equalize the signal. They are not extenders in the sense of "changing media" but are amplifiers or repeaters that allow the use of longer coaxial cable runs than usual.
   
Advantages:
Compatibility with Existing Infrastructure: Ideal for leveraging already installed coaxial cabling, reducing the need for new installations.
   
Lower Initial Cost: Generally more economical than fiber optic solutions for moderate distances.
   
Ease of Implementation: Typically plug-and-play and do not require complex configuration.
       
Power over Cable (PoC): Some models can receive power through the SDI cable itself, simplifying cabling.
     
SDI Extenders over Fiber Optic:
Description: They convert the electrical SDI signal into an optical signal, which is transmitted through fiber optic cables (single-mode or multi-mode) and then reconverted back into an electrical SDI signal at the receiving end.
       
Advantages:
Extreme Distance: They allow transmitting SDI signals over distances ranging from hundreds of meters to tens of kilometers, far exceeding the limitations of coaxial.
     
Immunity to Electromagnetic Interference (EMI/RFI): Fiber optic is immune to electrical and radio frequency interference, guaranteeing a clean and stable signal in noisy environments.
     
Greater Bandwidth: Capable of handling multiple SDI signals or higher resolution signals (such as 4K/UHD) with ease.
   
Reduced Weight and Size: Fiber optic cables are significantly thinner and lighter than coaxial cables for the same distance, facilitating installation and transport.
       
Security: They do not emit electromagnetic signals, which can be an advantage in environments where information security is critical.
         

Uses of SDI Video Extenders

SDI video extenders are indispensable in a wide range of professional applications:
   
Television Studios and Production: To connect cameras to control rooms over long distances, or to distribute signals to monitors in different areas.
         
Live Events (Concerts, Sports, Conferences): Where cameras may be far away from production units or control centers.
     
Fixed Installations (Auditoriums, Churches, Conference Rooms): For running cabling across large spaces.
     
Film Production and Remote Broadcast: To connect equipment on extensive sets or for geographically distributed productions.
     
High-Quality Video Surveillance Systems: When uncompressed video needs to be transmitted over long distances.
       
Audiovisual System Integration: In buildings or campuses where video sources and destinations are far apart.
       

Features to Consider When Choosing a Model

To select the appropriate SDI video extender, it is essential to consider the following features:
   
Supported SDI Format:
SD-SDI (270 Mbps): For standard resolutions (480i, 576i).
HD-SDI (1.485 Gbps): For high-definition video (720p, 1080i/p up to 30fps).
3G-SDI (2.97 Gbps): For 1080p up to 60fps.
6G-SDI (5.94 Gbps): For 4K UHD up to 30fps.
12G-SDI (11.88 Gbps): For 4K UHD up to 60fps.
   
Ensure the extender supports the highest signal format you need to transmit.
       
Maximum Transmission Distance:
Define the actual distance you need to cover. Fiber optic extenders offer the greatest distances.
         
Transmission Cable Type:
Coaxial: If you already have coaxial infrastructure and distances are manageable (generally up to a few hundred meters with active extenders).
     
Fiber Optic (Single-mode/Multi-mode): For very long distances or for environments with high interference. Single-mode fiber is for longer distances than multi-mode.
             
Additional Connections:
Embedded/De-embedded Audio: Some extenders can handle audio along with video.
Data (RS-232/RS-485): For controlling PTZ cameras or remote devices.
Tally: For camera signaling.
Ethernet: For IP control or additional data transmission.
Genlock/Timecode: For synchronization in complex production environments.
       
Number of Channels:
Do you need to extend a single SDI signal or multiple signals simultaneously (e.g., 4 SDI channels on a single fiber extender)?
     
Power:
Does it require an external power supply? Does it support Power over Coax (PoC) or Power over Fiber (PoF)?
   
Robustness and Design:
For outdoor use or in demanding environments, consider models with robust, weather-resistant, or rack-mountable enclosures.
     
Latency:
Although latency in SDI extenders is usually minimal (especially over fiber), in time-sensitive applications like live events or sports productions, it is a factor to consider.
       
At Avacab Audiovisuales, we offer a wide range of SDI video extenders to meet the most demanding needs of your production. Explore our products and find the perfect solution to extend your reach without compromising quality.
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