Fourteen documented 3G-SDI models — single-channel mini extenders, bidirectional units with tally and data, multi-channel rack units — carrying SDI with its embedded audio over one fiber.
SDI is the interface broadcast and professional AV never gave up: a locking BNC, embedded audio, and a signal that either locks or does not — no handshakes, no EDID surprises. Its weakness is copper distance. 3G-SDI over coax is a short-haul medium, and the moment a camera position, an OB truck or a studio floor sits more than a building away from the switcher, fiber stops being an upgrade and becomes the plan. This family converts 3G-SDI (with HD/SD-SDI compatibility across the range) to a fiber link and back, preserving the embedded audio and, on most models, the data channels that accompany a working camera feed.
The fourteen models split by format and by what else they carry. Mini extenders serve a single camera or a single return feed. Bidirectional units add tally, RS485/RS422 data and stereo audio for camera positions that must talk back. The 1U rack-mountable 8-channel unit aggregates a small plant onto one chassis. Two combination models merge SDI with Gigabit Ethernet — one even powers and carries eight PoE camera channels alongside forward and backward 3G-SDI — for sites where the fiber is shared infrastructure, not a private broadcast path.
| Model (official product name) | Series | Documentation |
|---|---|---|
| 1 Ch Bidirectional 3G-SDI Video Fiber Converter with Tally + RS485/RS422 + Stereo Audio + Microphone | — | Full specification confirmed per model at quotation |
| 1Ch 3G-SDI Fiber Extender with 4Ch HDMI Output | LNK-3G-1V4H | Specification captured from the official product page |
| 1U Rack-Mountable 8-Channel 3G-SDI Fiber Converter | — | Full specification confirmed per model at quotation |
| 3G-SDI Video Fiber Converter with Audio + RS422 + Ethernet + Tally + Sync | — | Full specification confirmed per model at quotation |
| 3G-SDI Video Fiber Converter with RS485 + RS232 + Stereo Audio Channel | — | Full specification confirmed per model at quotation |
| 3G/HD/SD-SDI Optical Micro-Extender with SMB Connector | — | Full specification confirmed per model at quotation |
| 4-Channel 3G-SDI Fiber Converter with RS485 & Tally | — | Full specification confirmed per model at quotation |
| 4-Channel Bidirectional 3G-SDI Fiber Converter | — | Full specification confirmed per model at quotation |
| 8Ch 3G-SDI + 1Ch 10G Ethernet over Fiber Extender | — | Full specification confirmed per model at quotation |
| 8Ch Gigabit PoE + 6Ch Forward 3G-SDI + 2Ch Backward 3G-SDI Fiber Optic Extender | — | Full specification confirmed per model at quotation |
| Converter Board for Sony Camera Output 3G/HD-SDI and HDMI | — | Full specification confirmed per model at quotation |
| Mini 3G-SDI over Fiber Extender | — | Full specification confirmed per model at quotation |
| Mini Bi-directional 3G-SDI to Fiber Converter | — | Full specification confirmed per model at quotation |
| Mini-type 3G-SDI to Fiber Converter with Tally & Reverse RS485 | — | Full specification confirmed per model at quotation |
All 14 models in the 3G-SDI family as listed in the manufacturer's catalogue. Models marked with a series code have their specification captured from the official product page; for the rest, the full specification is confirmed per model at quotation.
A bare video-only extender is the wrong buy if the camera also needs a tally lamp, a data return for PTZ or lens control, or sync. The family table shows which models fold in RS485, RS422, stereo audio, Ethernet and tally — pick the model whose ancillary set matches the position, because adding a second converter later costs more than the wider model now.
Models such as the LNK-3G-1V4H provide a local 3G-SDI loop output at the transmitter, so the feed can be monitored where it is generated while the fiber copy travels. If the position needs a confidence monitor, state it in the inquiry and the loop-out models come to the top of the shortlist.
3G-SDI is the family ceiling, and most models also handle HD-SDI and SD-SDI rates — but do not let a model name carry that assumption into an order. Before payment, confirm the exact model supports your signal rate and your fiber type in writing.
Yes — SDI carries its audio embedded in the video stream, and the conversion is transparent to it. Models with separate stereo audio channels add an independent analog path on top.
The families interoperate at the signal level; what must match is each individual link's transmitter/receiver pairing and optical module. A rack receiver chassis at the hub with mini transmitters at cameras is a normal layout — confirm the pairings per link at quotation.
Most 3G-SDI models are multi-rate. The HD-SDI family page lists the dedicated HD-SDI models; confirm your rate against the exact model before payment.
Send the model name, the distance, the fiber type and the quantity. We will confirm the matching transmitter/receiver pairing, the optical module and the full specification of the exact model in writing before you pay.