1080P Bi-directional 3G-SDI Fiber Converter with Audio/Tally/RS422/Microphone 20km

E-link 1080P 3G-SDI Fiber Converter The 3G/HD-SDI Fiber Converter is designed to facilitate the transmission of 1-channel bidirectional 3G/HD-SDI video with embedded audio, featuring a loop-out option. Additionally, it supports 1-channel tally, 2-channel bidirectional RS485 or RS422 data, 2-channel external stereo audio, and a 1-channel microphone signal, all transmitted seamlessly through fiber optical cable. Overview The LNK-3G-1BV1T2BD2A1M Series represents a high-performance, bi-directional 3G-SDI fiber optic converter engineered for professional broadcast and mission-critical video links. This advanced unit is purpose-built for simultaneous bidirectional transmission of a complete media suite over a single fiber. It consolidates one channel of 3G-SDI video signal transmission (with embedded audio) and its return path, alongside a loop-out for local monitoring. The system also integrates a tally signal, bidirectional RS485/RS422 data for device control, two channels of stereo audio, and a microphone input.Constructed for reliability, this 3G-SDI transceiver features automatic reclocking and delivers uncompressed, broadcast-grade video quality over distances up to 20km. Clear LED status indicators provide instant visual confirmation of system health and signal integrity. Its robust design ensures stable operation across a wide temperature range, making it the ideal fiber conversion solution for demanding environments such as live event production, broadcast program transmission, intelligent traffic systems, and extensive security and industrial monitoring networks. Bi-directional 3G-SDI & Loop-Out Port Provides a primary 3G-SDI fiber link with a local loop-through output for real-time signal monitoring or distribution without additional splitters. Broadcast Tally Signal Interface Features a dedicated tally circuit for seamless integration with broadcast control systems, enabling direct camera status indication in live production environments. Application Live Broadcast & Outside Broadcasting (OB): Ensures reliable, long-distance transmission of HD video and audio for live sports events, concerts, and news gathering.Remote Production & Studio Links: Facilitates high-quality signal transport over single-mode fiber, supporting PTZ control via bidirectional RS422/RS485 data.Security & Surveillance Systems: Provides a stable fiber optic link for high-definition video surveillance in critical infrastructure, such as airports, city centers, and ports.Intelligent Transportation Systems (ITS): Enables real-time traffic monitoring and management by transmitting uncompressed video from roadside cameras to central control rooms over 20km distances.Industrial Monitoring & Control: Delivers reliable video and data communication in harsh environments like power substations, oil refineries, and manufacturing plants, utilizing its broad operating temperature range. Why Choose Us Hot-Swappable Operation: Designed for hot-plugging capability, facilitating installation and maintenance without the need to power down the entire system, minimizing operational downtime.Uncompressed Broadcast-Level Quality: Maintains end-to-end, fully digital signal transmission without compression, preserving the original video quality and meeting the demands of professional broadcast workflows.Industrial-Grade Temperature Resilience: Engineered to operate reliably in extreme temperatures from -20°C to 70°C, making it suitable for both controlled studios and harsh field environments. Technical Indexes Fiber Optical interface                                                                   Fiber interfaceSimplex LCTransmission distance0-20KmWavelength1310nm/1550nmVideoVideo interfaceBNCVideo input/output impedance75ΩVideo input/output voltageTypical:1Vpp, Min 0.5Vpp, Max 1.5VppVideo Bits RateMax 3.2Gb/sDifferential gain (10%～90% APL)<1%SDI format support625/25 PAL525/29.97 NTSC, 525/23.98 NTSC720p50, 720p59.941080i 23/24/30/50/59.941080P 23.98/24/30/50/60Video SDI standard270Mbps (SD-SDI), 1.485Gbps/M(HD-SDI)SMPTE425M3Gb/s Mapping(3G-SDI)SMPTE424M 3Gb/s serial interface(3G-SDI)Data or TallyPhysical interfaceIndustrial standard screw terminalData typeRS485 (Default) or RS422 (Optional), Tally signalFrequency/Rate supportMax. 115200bps for RS422Max. 57600bps for RS485BER<10ˉ9Stereo Audio or MicrophoneAudio input and output3.5MM AudioAudio format@48KHzElectricalPower adaptorDC 5~25VPower consumption<5WLED IndicatorP/SPower SupplyDATDataMechanicalDimensions (LxWxH)120 x 105 x 28 mmWeight1.5KG/pairCasingAluminum CaseMounting OptionsWall-mountEnvironmental Working Temperature-20℃～ 70℃Storage Temperature-40℃～ 80℃Working Humidity0~95%MTBF≥100000 hours Ordering Information ModelDescriptionLNK-3G-1BV1T2BD2A1M1Ch Bidirectional 3G-SDI with Loop 1Ch Tally 2Ch Bidirectional RS485 or RS422 2Ch Stereo Audio 1Ch Microphone over Fiber Converter, Single Mode Fiber, LC, 20km, including Transmitter and Receiver, used by pairs https://www.youtube.com/@E-linkChina