3G HD SDI Fiber Multiplexer with RS422 Audio Ethernet Tally Intercom Return Video

Model: LNK-MSDI Series

 Product Description & Overview

The 3G/HD/SD-SDI, RS422, Audio, Ethernet, Tally, Intercom & Return Video over Fiber Multiplexer

represents a comprehensive signal integration solution for professional broadcast and live production

environments. This advanced fiber multiplexer supports simultaneous transmission of 3G-SDI, HD-SDI,

and SD-SDI video signals in compliance with SMPTE 424M-2006, 292, and 259 standards, while integrating

multiple auxiliary channels including RS422 camera control, bidirectional audio, 10/100Base-T Ethernet, tally

signals, intercom communication, and return video feed. The system efficiently consolidates all essential

broadcast signals onto a single multimode or single-mode fiber optic cable, significantly simplifying cable

infrastructure in complex production setups.

Engineered for multi-camera broadcast applications, this multiplexer establishes a complete signal pathway

between camera units and base station equipment. The forward channel transports pristine 3G/HD-SDI video

from camera to control room, while the return path delivers program video, genlock reference, intercom

communication, tally indicators, and Ethernet data back to the camera position. This bidirectional capability

enables full remote camera control and real-time communication between production crew and camera

operators, essential for live broadcasts and remote production scenarios.

The system's robust design ensures reliable operation in both studio environments and demanding field

production conditions. Utilizing either tactical fiber cables for mobile applications or SMPTE hybrid fiber

assemblies for fixed installations, this multiplexer provides complete immunity to electromagnetic interference

and ground loop issues. This makes it particularly suitable for outside broadcasts, sports events, news gathering,

and studio productions where signal integrity and operational reliability are paramount. By integrating multiple

signal types through a single fiber connection, the system dramatically reduces cable bulk and setup time while

maintaining the highest broadcast quality standards across all transmitted signals.

Key Features Bullets

• Multi-Standard Video Support
  Compliant with SMPTE 3G/HD/SD-SDI standards including 424M, 292M and 259M, plus DVB-ASI

• Robust Signal Processing
  Handles all pathological test patterns with automatic cable equalization for optimal signal integrity

• Advanced Clock Recovery
  Automatic reclocking across 270Mbps to 3Gbps data rates with precision timing restoration

• Integrated Broadcast Communications
  Comprehensive support for remote control, tally, intercom audio and return video channels

• Network Connectivity
  10/100 Ethernet channel for data transmission and device management

• Universal Serial Control
  Compatible with RS-232, RS-422, and RS-485 protocols for camera and device control

• Flexible Fiber Deployment
  Transmission up to 10km on single-mode fiber or 300m on multi-mode fiber

• Professional Power Management
  Terminal block power input with hot-swappable capability for continuous operation

• Extended Temperature Operation
  Industrial-grade operating temperature range from -10℃ to 75℃ for various environments

• Broadcast-Grade Reliability
  Designed for continuous operation in professional broadcast and production applications

Technical Specifications & Indexes

Application Scenarios

• Multi-camera live broadcast production systems

• Outdoor broadcasting and remote production setups

• Sports event multi-camera signal transmission

• Television studio camera intercom and control systems

• Large venue live production and signal distribution