1080P 4Ch HD-SDI Fiber Converter with Tally and RS485 20km Transmission

1080P 4Ch HD-SDI Fiber Converter with Tally and RS485 20km Transmission LNK-HDSDI-4V1DT Series supports 4Ch HD-SDI standard high-definition video signal and RS485 and Tally signal transmitted via single fiber optical cable. 4Ch HD-SDI Video over Fiber Converters includes one transmitter and one receiver for 1080P HD-SDI signal. 4-Channel Broadcast Hub: Uncompressed HD-SDI over 20km Fiber Consolidate your multi-camera production setup with our powerful 4Ch HD-SDI fiber converter, engineered to transmit four channels of uncompressed, broadcast-level 1080P video over a single fiber optic link. This all-in-one solution eliminates the need for multiple single-channel devices, streamlining your broadcast chain and reducing system complexity. With a remarkable transmission distance of up to 20 kilometers, it effortlessly connects remote camera positions—whether on the far side of a stadium, in a separate building, or at an outside broadcast van—back to the production control room. Experience flawless signal integrity with automatic cable equalization and reclocking, ensuring your critical live feed is delivered with zero latency and pristine quality. Integrated Tally & Camera Control: Complete Live Production Solution Go beyond simple video transport with a converter that integrates essential live production controls. This 4Ch HD-SDI features 4 independent channels of Tally support, allowing you to send the classic ‘on-air’ red light signal directly to each camera over the fiber, crucial for coordinating talent and crew during live broadcasts. Simultaneously, the 1-channel backward RS485 data path enables precise remote control of PTZ (Pan-Tilt-Zoom) cameras and lens functions from the control room, eliminating the need for separate control cables. This integration of video, tally, and control in one robust device creates a streamlined, reliable, and professional-grade link for live events, broadcast studios, and worship production. Application Live Event Production & Outside Broadcast (OB Vans): Provides a critical fiber optic backbone for multi-camera setups at sports events, concerts, and live shows. 4Ch HD-SDI enables the simultaneous transmission of HD-SDI video signals from multiple cameras over a single optical fiber, along with essential Tally data for director-to-camera communication and RS485 control for remote PTZ camera operation, ensuring seamless live production workflows.Television Studio & Broadcast Facility Infrastructure: Used to extend signals between control rooms, production suites, and remote camera positions across a large facility or campus. The broadcast-level, non-compressed transmission guarantees zero latency and preserves signal integrity, while the loop-through output allows for local monitoring. Its long-haul transmission capability of up to 20km makes it perfect for inter-building links.Large-Scale AV & Pro-AV Distribution Systems: Ideal for distributing high-quality video in demanding environments such as corporate headquarters, universities, and worship facilities. The system supports long-distance video transmission for digital signage networks, command and control centers, and distance learning studios, while the bi-directional RS485 allows for centralized control of far-end equipment.Remote Production and Contribution Links: Offers a reliable solution for fiber optic contribution, connecting remote venues or satellite trucks back to a central production hub. The combination of 4K-ready data rates (up to 1.48Gbit/s), robust construction, and support for critical ancillary data makes it a compact and reliable transport solution for outside broadcast (OB) and SNG (Satellite News Gathering) operations. Why Choose Us Maximize Production Value with Multi-Channel EfficiencyConsolidate your setup and reduce fiber count. Our converter transmits 4 channels of uncompressed 1080P video, along with Tally and RS485 data, over a single fiber. This high-density design simplifies cabling, lowers costs, and provides exceptional scalability for multi-camera productions.Guaranteed Signal Integrity Over Long DistancesGo the distance without compromise. Featuring automatic equalization and reclocking, our system ensures broadcast-level video quality with zero compression, even at the maximum 20km transmission range. This guarantees pristine signal integrity from camera to control room, critical for live broadcasts.Seamless Integration and Comprehensive ControlDesigned for real-world workflows. With built-in support for 4CH Tally signaling and bi-directional RS485, our 4Ch HD-SDI enables direct integration with your PTZ camera controls and production tally systems, creating a unified and responsive broadcast environment.Built for Demanding Professional EnvironmentsTrust in robust performance. Engineered to operate reliably in a wide industrial temperature range (-10℃ to 55℃), this converter is built to withstand the rigors of outside broadcast vans, mobile production units, and challenging installation sites. 4Ch HD-SDI Overview The LNK-HDSDI-4V1DT Series is a high-performance 4-channel HD-SDI to fiber optic converter designed for professional broadcast and video production environments. This 4Ch HD-SDI compact yet powerful solution enables the simultaneous transmission of four channels of uncompressed 1080P high-definition video, along with essential Tally data and bidirectional RS485 control signals, over a single optical fiber.Engineered to meet broadcast-level standards, the 4Ch HD-SDI system guarantees pristine video quality with zero compression or latency, ensuring integrity from source to display. It supports loop-through output for flexible signal distribution and integrates Tally signaling for direct communication with camera and production systems. The built-in RS485 interface allows long-distance remote control of PTZ cameras and other studio equipment.Ideal for live event production, outside broadcast (OB) vans, television studios, and large-scale AV installations, this converter provides a reliable, long-distance signal extension solution while simplifying cabling and maintaining full signal fidelity across your entire video network. 4Ch HD-SDI Technical Indexes SDI InputSMPTE 424M, SMPTE 292M, SMPTE 259M, DVB-ASI, DVB-SSI and Telecom/Datacom270Mbit/s – 1.48Gbit/sInput number: 4Reflection loss: >15DBEquilibrium: 0-150m @1.5Gb/sConnector: BNCOpticsChannel: 1Type: single-modeTransmission distance: 20km (Other distance Optional)Reflection loss: > 15dBDithering: < 0.2UIConnector: FC/UPC (SC, LC, ST optional)SDI OutputOutput number:4Signal level: 800mV nominalRise/fall time: 200ps indicationOvershoot: < 10% amplitudeReflection loss: >15dBDithering: < 0.2UIConnector: 75Ω BNCData1Ch RS-485 (full/half duplex) and support NRZ, RZI and ManchesterMax. 57600bps for RS485Connector: Industrial standard screw terminal4Ch Tally: A, B , C, DPower and environmental indicationOperating temperature: -10℃～＋55℃Power Input: 1A@12VDCEMI/RFI: meet FCC Part 15 Class A, EU EMC standardAverage time trouble-free: >100000 hoursSDI video format supports625/25PAL; 525/29.97NTSC; 525/23.98NTSC; 720p50; 720p59.94;1080P23.98/24/30/50/60; 1080i 23/24/30;TALLYConnection:Transmitter TALLY Signal Output Connection: (Can drive the LED indicator directly) T-AT-BT-CT-DGNDLED TypeSDI-ASDI-BSDI-CSDI-DGNDReceiver TALLY Signal Input Connection: (LED load type is only suitable for OC derive LED – driver) ABCDVDDLED TypeSDI-ASDI-BSDI-CSDI-D RS485Connection:GNDD D- Ordering Information LNK-HDSDI-4V1D4T4-Ch HD-SDI Video with Loop output backward RS485 4Ch Tally, SM 20km, FC/ST/SC/LC Optional, including 1 transmitter & 1 receiver, used by pairshttps://www.youtube.com/@E-linkChina