4-Channel 3G-SDI Fiber Converter with RS485 & Tally with Automatic cable equalization to ensure signal integrity

Price	$25-369
MOQ	1 pair
Delivery Time	3-5 working days
Brand	E-link
Place of Origin	China
Certification	ISO9001, CE, ROHS, FCC
Model Number	LNK-3GSDI-4V1DT
Packaging Details	SDI Fiber Extender Standard Carton Packaging
Payment Terms	T/T,Western Union,MoneyGram,PayPal
Supply Ability	1000/Month

Product Details

Product Specification

Place of Origin	China	Signal level	800mV nominal
Packaging Details	SDI Fiber Extender Standard Carton Packaging	Transmission distance	20km (Other distance Optional)
Model Number	LNK-3GSDI-4V1DT	Supply Ability	1000/Month
Equilibrium	0-150m @3Gb/s	Certification	ISO9001, CE, ROHS, FCC
Brand Name	E-link	Payment Terms	T/T,Western Union,MoneyGram,PayPal
Reflection loss	>15DB	Price	$25-369
Delivery Time	3-5 working days	Minimum Order Quantity	1 pair
Operating temperature	-10℃～＋55℃	Power Input	1A@12VDC

Product Description

4-Channel 3G-SDI Fiber Converter with RS485 & Tally

Model: LNK-3GSDI-4V1DT

Overview

The LNK-3GSDI-4V1DT Series is a high-performance 4-Channel 3G-SDI Fiber Converter with

RS485 & Tally, specifically engineered to integrate multi-channel video transmission and auxiliary

signal synchronization into a single fiber optical cable—catering to professional broadcast, surveillance,

and live production scenarios that demand high-density, reliable signal delivery. As a 4-Channel 3G-SDI

Fiber Converter with RS485 & Tally, it combines robust multi-video channel support with essential

control signals, enabling efficient, space-saving deployment in broadcast studios, live event setups,

or large-scale HD surveillance networks.

This converter supports synchronized transmission of 4-channel HD/3G-SDI standard high-definition

video signals, 1-channel RS485 data signals, and 4-channel Tally signals via a single fiber optical

cable—eliminating the need for multiple independent cables, simplifying infrastructure complexity,

and reducing installation and maintenance costs. It is supplied as a complete functional set, including

one dedicated transmitter unit and one matching receiver unit, both optimized for 1080P 3G-SDI signal

transmission to ensure consistent, broadcast-grade video quality. The non-compressed video transmission

design preserves every detail of the original signal, meeting the strict quality standards of professional

broadcast fields where image clarity and color accuracy are non-negotiable.

A key advantage of the 4-Channel 3G-SDI Fiber Converter with RS485 & Tally is its integrated loop

output function: the transmitter unit provides loop outputs for each 3G-SDI channel, allowing users to

connect local monitors for real-time signal previews. This feature facilitates quick troubleshooting (such

as identifying signal anomalies early) and ensures signal integrity before long-distance transmission,

critical for time-sensitive broadcast or live event operations. Additionally, the 4-channel Tally signal support

enables real-time status indication of each video source (e.g., “on-air” active status or “preview” standby

status), helping production teams coordinate seamlessly and avoid operational errors in multi-camera setups.

The backwards RS485 function further enhances operational flexibility by supporting bidirectional serial data

communication, enabling remote control of connected devices like PTZ cameras, studio lighting controllers,

or video switchers from the receiver end—reducing the need for on-site manual adjustments and streamlining

workflow efficiency. With its stable multi-signal transmission performance, broad compatibility with HD/3G-SDI

devices, and broadcast-level video quality, this converter is widely applicable in professional fields including TV

broadcast studios, live sports events, large-scale stage productions, and high-end HD surveillance systems. It

effectively resists electromagnetic interference (EMI) and signal attenuation over long fiber distances, ensuring

consistent video output, reliable Tally status feedback, and smooth RS485 control—making it a comprehensive,

cost-effective solution for modern multi-channel 3G-SDI signal transmission needs.

Features

► 4 channel 3G/HD-SDI video transmission over optic fiber

► Automatic cable equalization to ensure signal integrity

► Automatic reclocking 270Mbit/s - 1.48Gbit/s-3Gbit/s

► Directly compatible with 3G/HD-SDI camera systems and support 4Ch Loop output

► Long transmission up to 20 km (12.5miles) (Other distance Optional)

► Supports 4Ch Tally

► Full digital non-compression broadcast level transmission;

► Support 1Ch backward RS485 and 4Ch Tally;

► Working temperature range (-10℃~+55℃)

Technical 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
Optics	Channel: 1
	Type: single-mode
	Transmission distance: 20km (Other distance Optional)
	Reflection loss: > 15dB
	Dithering: < 0.2UI
	Connector: FC/UPC (SC, LC, ST optional)
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
Power and environmental indication	Operating temperature: -10℃～＋55℃
	Power Input: 1A@12VDC
	EMI/RFI: meet FCC Part 15 Class A, EU EMC standard
	Average time trouble-free: >100000 hours
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;
SDI video format supports

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

Application

4-Channel 3G-SDI Fiber Converter with RS485 & Tally with Automatic cable equalization to ensure signal integrity

Product Details

Product Specification

Product Description

4-Channel 3G-SDI Fiber Converter with RS485 & Tally

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