12G-SDI with Reverse RS485, and 2-Channel Reverse Tally over fiber Transmission System (TX/RX Pair)

The F-12G-SDI-D-T-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 12G-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, SMPTE424M and ST2082-1 standards, ensuring full compatibility with broadcast video formats including SD, HD, and 12G-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 10 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.

• Standards compliance: SMPTE ST2082-1 (12G UHD-SDI), ST2081-1 (6G UHD-SDI), SMPTE 424M/292M/259M/297M/305M/310M
• Supports pathological video modes and irregular bitrate signals (SFP)
• Clock recovery to reduce jitter and process distorted signals
• Input cable equalization to compensate for cable loss
• Reverse RS-485 data channel (EIA RS-485)
• 2-channel TALLY (Red + Green)
• 1/4 hot shoe mount support
• Power options: DC (5.5×2.1mm) or USB Type-C
• Single-mode fiber distance up to 10 km

F-12G-SDI-D-T-TxRx – Fiber optic transmitter and receiver kit for one 12G-SDI video channel, with return RS485 data channels and two return Tally signals. -10Km

Transmitter (TX)

• 12G-SDI IN (BNC)
• 12G-SDI LOOP OUT (BNC)
• OPTICAL: LC SFP module interface
• Reverse outputs: RS485+/RS485-, TALLY R, TALLY G, GND
• Power: DC 5.5×2.1mm (5–30V) with lock ring + USB Type-C (5V)

Receiver (RX)

• 2× 12G-SDI OUT (BNC) — same video output
• OPTICAL: LC SFP module interface
• Reverse inputs: RS485+/RS485-, TALLY R, TALLY G, GND
• Power: DC 5.5×2.1mm (5–30V) with lock ring + USB Type-C (5V)

F-3G-SDI-D-T-TxRx – Fiber optic transmitter and receiver kit for one 3G-SDI video channel, with return RS485 data channels and two return Tally signals. -10Km

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