3G-SDI Fiber Converter 4 Channel Tally RS485 20km Broadcast
Model : LNK-3GSDI-4V1DT Series
Product Description & Overview
The LNK-3GSDI-4V1DT Series represents a cutting-edge fiber optic
transmission system engineered
for professional broadcast applications requiring multi-channel
signal integrity. This advanced converter
extender simultaneously transmits four channels of uncompressed
HD/3G-SDI video signals alongside
bidirectional RS485 data and tally control through a single fiber
optic cable. Supporting full 1080p
resolution at broadcast-quality standards, this robust solution
maintains pristine video quality with zero
compression or latency, making it ideal for mission-critical live
production environments.
Featuring comprehensive loop-through output capability, this
professional-grade system enables
seamless signal distribution while preserving original source
quality across all four independent
channels. The integrated tally function provides real-time camera
status indication, while the
bidirectional RS485 interface supports advanced camera control and
equipment management.
Designed specifically for broadcast facilities, outside broadcast
vans, and live event production,
this fiber-based solution eliminates electromagnetic interference
and ground loop issues commonly
encountered in complex production setups.
The system's sophisticated optical engine ensures reliable
transmission across extended distances while
maintaining perfect synchronization between all video channels and
control signals. With hot-swappable
modules and automatic signal equalization, this converter
establishes new benchmarks for multi-channel
broadcast transmission, providing exceptional value for sports
broadcasting, studio production, and live
event coverage where signal reliability and operational flexibility
are paramount. The rugged construction
and professional connectivity options make it an essential
component in modern broadcast infrastructure
requiring simultaneous transmission of multiple high-definition
video streams with integrated control
capabilities.
Key Features Bullets
Multi-Channel Broadcast Transmission
4-channel 3G/HD-SDI video transmission over single optical fiber
Professional Signal Integrity
Automatic cable equalization and reclocking from 270Mbps to 3Gbps
Extended Distance Operation
Up to 20km transmission range with optional distance configurations
Integrated Production Control
4-channel Tally support with bidirectional RS485 communication
Broadcast-Level Performance
Uncompressed digital transmission maintaining original signal
quality
Universal Camera Compatibility
Direct integration with 3G/HD-SDI camera systems featuring loop
output
Industrial Temperature Range
Reliable operation from -10℃ to +55℃ environments
Technical Specifications & Indexes
| SDI Input | SMPTE 424M, SMPTE 292M, SMPTE 259M, DVB-ASI, DVB-SSI and
Telecom/Datacom |
| 270Mbit/s - 1.48Gbit/s – 3Gbit/s |
| Input number: 4 |
| Reflection loss: >15DB |
| Equilibrium: 0-150m @3Gb/s |
| Connector: BNC |
| SDI Output | Output number:4 |
| Signal level: 800mV nominal |
| Rise/fall time: 200ps indication |
| Overshoot: < 10% amplitude |
| Reflection loss: >15dB |
| Dithering: < 0.2UI |
| Connector: 75Ω BNC |
| Data | 1Ch RS-485 (full/half duplex) and support NRZ, RZI and Manchester |
| Max. 57600bps for RS485 |
| Connector: Industrial standard screw terminal |
| 4Ch Tally: A, B , C, D |
| SDI video format supports | 625/25PAL; 525/29.97NTSC; 525/23.98NTSC; 720p50; 720p59.94; 1080P23.98/24/30/50/60; 1080i 23/24/30/50/59.94; |
Application Scenarios
Supporting multi-camera live broadcast production systems
Enabling outdoor broadcasting with extended fiber transmission
Facilitating studio camera connectivity with tally control
Providing broadcast-level video transmission for live events
Supporting professional video production in harsh environment
Ordering Information
| LNK-HDSDI-4V1D4T | 4-Ch HD-SDI Video with Loop output + 1Ch backward RS485 + 4Ch
Tally, SM 20km, FC, including 1 transmitter & 1 receiver, used by
pairs |
| LNK-3GSDI-4V1D4T | 4-Ch 3G-SDI Video with Loop output + backward RS485 + 4Ch Tally, SM
20km, FC, including 1 transmitter & 1 receiver, used by pairs |
