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
Advanced Optical Transmission
Broadcast-Grade Performance
Extended Reach Capability
Robust Industrial Design
Seamless System Integration
Maintenance-Friendly Operation
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
| Fiber Optical interface |
| Fiber interface | Simplex LC |
| Transmission distance | 550m-20Km |
| Wavelength | 1310nm/1550nm |
| Video |
| Video interface | BNC |
| Video input/output impedance | 75Ω |
| Video input/output voltage | Typical:1Vpp, Min 0.5Vpp, Max 1.5Vpp |
| Video Bits Rate | Max 3.2Gb/s |
| Differential gain (10%～90% APL) | <1% |
| SDI format support | 625/25 PAL |
| 525/29.97 NTSC, 525/23.98 NTSC |
| 720p50, 720p59.94 |
| 1080i 23/24/30/50/59.94 |
| 1080P 23.98/24/30/50/60 |
| Video SDI standard | 270Mbps (SD-SDI), 1.485Gbps/M(HD-SDI) |
| SMPTE425M3Gb/s Mapping(3G-SDI) |
| SMPTE424M 3Gb/s serial interface(3G-SDI) |
| Data |
| Physical interface | Industrial standard screw terminal |
| Data type | Reverse RS485 |
| Frequency/Rate support | Max. 57600bps for RS485 |
| BER | <10ˉ9 |
| Electrical |
| Power adaptor | AC 110~220V |
| Power consumption | <15W |
| LED Indicator |
| SDI A/B/C/D/E/F/G/H | SDI video |
| PWR | Power Supply |
| Mechanical |
| Dimensions (LxWxH) | 19inch 1U (483 x 220 x 44.45mm ) |
| Weight | 7KG/pair |
| Casing | Aluminum Case |
| Mounting Options | Rack mount |
| Environmental |
| Working Temperature | -20℃～+70℃ |
| Storage Temperature | -40℃～+80℃ |
| Working Humidity | 0~95% |
| MTBF | ≥100000 hours |
Ordering information
| Model | Description |
| LNK-3GSDI-4BV | 4-Ch Bidirectional 3G-SDI Video with loop-out, 20km, SM, FC,
including 1 transmitter & 1 receiver, used by pairs |
| LNK-3GSDI-4BV1R | 4-Ch Bidirectional SDI Video with loop-out + 1-Ch RS485 Reverse
Data, 20km, SM, FC, including 1 transmitter & 1 receiver, used by
pairs |
