4-Channel Bidirectional 3G-SDI Fiber Converter 120km Range Broadcast Grade

4-Channel Bidirectional 3G-SDI Fiber Converter 120km Range Broadcast Grade

Overview

The LNK-3GSDI-4BV Series represents a high-performance fiber optic transmission solution engineered for professional broadcast and video production environments. This advanced system enables simultaneous transmission of four independent 3G-SDI video channels in bidirectional configuration over a single fiber optic cable, significantly reducing infrastructure costs while maintaining broadcast-grade signal quality.

Our innovative fiber converters utilize cutting-edge optical transmission technology to deliver uncompressed 1080P high-definition video with exceptional clarity and stability. Each channel features independent 3G/HD-SDI loop-through outputs for local monitoring, providing real-time signal verification without compromising the main transmission path. The system fully complies with 3G-SDI standards (SMPTE 424M, 292M, 259M), ensuring seamless integration with existing broadcast equipment and infrastructure.

Beyond video transmission, this comprehensive solution incorporates a dedicated reverse RS-485 data channel, enabling bidirectional control communication for PTZ cameras, robotic systems, and other remotely operated devices. The integrated architecture supports crystal clear audio transmission with CD-quality performance, making it ideal for demanding applications where audio-video synchronization is critical.

Specifically designed for mission-critical video distribution, this system provides complete electrical isolation and immunity to electromagnetic interference, ensuring reliable operation in electrically noisy environments. The robust construction and advanced error correction mechanisms guarantee uninterrupted performance for broadcast studios, live event production, sports venues, and security monitoring applications requiring multi-channel HD video transmission with precise control capabilities.

Features

• Intelligent Signal Processing

  • Features automatic cable equalization technology and precision re-clocking circuitry that dynamically adjusts to data rates from 270Mbps to 3Gbps, ensuring optimal signal integrity across varying cable conditions.

• Advanced Optical Transmission

  • Incorporates WDM/CWDM/DWDM multiplexing technology over single-fiber infrastructure, enabling high-density video transmission while maximizing fiber utilization efficiency for cost-effective network expansion.

• Broadcast-Grade Performance

  • Delivers uncompressed digital video transmission meeting broadcast-level quality standards with extended optical dynamic range, eliminating the need for manual adjustments during deployment.

• Extended Reach Capability

  • Supports long-haul transmission distances from minimum 10km to maximum 120km, providing flexible deployment options for both local and remote video applications.

• Robust Industrial Design

  • Engineered for ultra-wide temperature operation from -40℃ to +85℃, featuring terminal block power connectivity suitable for harsh industrial environments and outdoor installations.

• Seamless System Integration

  • Maintains native compatibility with 3G-SDI camera systems while supporting reverse RS-485 serial control for PTZ operation and device management through the same fiber link.

• Maintenance-Friendly Operation

  • Enables hot-swappable module replacement and hot-pluggable connectivity, allowing system maintenance and expansion without service interruption or downtime.

Application Scenarios

• Live Broadcast Productions
  Enables multi-camera signal aggregation for outside broadcast vans and mobile production units, supporting 3G-SDI camera feeds with reverse camera control through RS-485 PTZ protocols over single-fiber infrastructure.

• Sports Venue Infrastructure
  Distributes stadium camera signals from multiple angles to production control rooms, maintaining broadcast-grade video quality across extended fiber runs up to 120km while ensuring frame-accurate synchronization.

• Event Venue Systems
  Supports large-scale video distribution in convention centers and performance venues, transmitting multi-source HD content to display processors and video walls with uncompressed signal preservation.

• Broadcast Facility Networks
  Establishes inter-building video links between production studios and master control rooms, providing signal integrity through automatic re-clocking technology and cable equalization.

• Security & Surveillance Networks
  Integrates high-definition CCTV systems with PTZ camera control, enabling multi-camera monitoring across distributed facilities while operating in extreme temperature conditions (-40℃ to +85℃).

• Distance Learning Environments
  Facilitates multi-source video distribution in educational campuses, transmitting lecture capture feeds and presentation content to remote classrooms with bidirectional control capabilities.

Technical Indexes

Ordering information

Established in 2001 & headquartered in Shenzhen, E-link China Technology Co., Ltd. (E-link) is a leading manufacturer of fiber optic communication and video transmission products in China.

Our main products include:

• Fiber Media Converters
• Industrial Ethernet PoE switchs
•  PoE Injectors & Splitters
• PoE Extenders
• Serial Fiber Converters
• SFP Transceivers
• HDMI Fiber Converters
• DVI Fiber Converters
• HD/3G/6G/12G Fiber Extenders
• CCTV Fiber Optic Converters
• HDMI/ DVI/ VGA/ SDI Ethernet Extenders

With rich experience in providing high quality products in the
telecom and CCTV business, E-link has a large manufacturing factory
in Shenzhen, able to provide cost-effective solutions 

to serve our customers successfully.



   

   

                                                                   
                                                                  
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Since the launch of our products in domestic and international
markets, we have won a good reputation for our high-quality
products and sincere services. Our products are widely applied to

• System of Telecom
• Public Security
• Bank
• Smart City
• Public transportation
• New Energy Developing
• CCTV Monitoring Transmission

We also provide ODM & OEM services and we have cooperated with some famous companies all
over the world. Our own brand "E-link" is also well known in many countries and have distributors there.





   





















































                                                                   
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E-Link quality:

• ISO9001 Quality System
• CE, RoHS, FCC certified 
• 48 hours of weathering test before delivery
• Conduct full-spectrum environmental and electrical testing on all product designs

   





Our knowledgeable sales, technical support and engineering
personnel are dedicated to understanding your needs and designing
products and solutions to meet your needs. We would be happy to
provide you with the best price, quality products and fast
delivery.