3G-SDI with 2-Channel Reverse RS485, and 2-Channel Reverse Tally

The F-3G-SDI-2D-2T-TxRx : 1-channel 3G-SDI Fiber Transmission System is a professional-grade optical transceiver designed for long-distance video, data, and tally signal transport over a single optical fiber. It features one 3G-SDI input with loop-out, two reverse RS-485 data channels, and two reverse tally channels (one red, one green), providing a complete camera-to-control-room communication link.

The system is compliant with EN50083-9, SMPTE259M(C), SMPTE292M, and SMPTE424M standards, ensuring full compatibility with broadcast video formats including SD, HD, and 3G-SDI. The integrated SFP optical module supports pathological code video and irregular bitrates, maintaining stable video image transmission under any condition. Built-in clock recovery and jitter reduction circuits restore signal integrity, while input cable equalization compensates for signal loss over long coax runs—supporting up to 100 meters of SDI cable.

The RS-485 data interface provides transparent, real-time control signal return, ideal for camera control units (CCU), PTZ commands, or intercom systems. The dual tally return function provides camera status indication to operators or talent on set, with separate red and green light control channels.

The device operates on a wide 5–30V DC power range, supporting both barrel DC and USB Type-C inputs for flexible power options in studio or field use. Utilizing single-mode fiber, the transmission distance can reach up to 20 km without loss or delay.

Application Scenarios:

• Broadcast Studios: Connect studio cameras to control rooms, carrying video, camera control, and tally over a single fiber.

• Outside Broadcast (OB) Vans: Ideal for mobile production trucks that require compact, lightweight, and reliable long-distance camera feeds.

• Live Event Production: Transmit camera signals and operator feedback during concerts, sports, or church events with synchronized tally indication.

• Remote Camera Systems: Extend camera control and monitoring to remote locations such as arenas, auditoriums, and surveillance installations.

• Industrial and Medical Imaging: Suitable for high-definition video transport in inspection, medical visualization, or live production monitoring systems.

• Supports SD-SDI (SMPTE259M), HD-SDI (SMPTE292M), and 3G-SDI (SMPTE424M) standards.

  Supports video resolutions up to Full 3G-SDI 1080p @ 59.94/60Hz.

• The SFP optical module supports pathological code video, irregular bitrates, and pathological test patterns, ensuring stable video transmission.

• Built-in clock recovery circuit reduces signal jitter and restores distorted signals.

• Input cable equalization compensates for coaxial transmission losses.

• Supports SDI input/output cable lengths up to 100 meters.

• RS-485 data interface complies with the EIA RS-485 standard and provides transparent data transmission.

• Supports 2-channel tally signals — one red and one green.

• Wide voltage range (DC 5–30V) design with dual power input options: DC barrel and USB Type-C.

• Single-mode optical fiber transmission distance up to 20 km.

F-3G-SDI-2D-2T-TxRx – Fiber optic transmitter and receiver kit for one 3G-SDI video channel, with two return RS485 data channels and two return Tally signals. -20Km