3G/HD/SD-SDI Fiber Multiplexer w Audio Ethernet Tally Intercom
Overview
The LNK-MSDI Series integrates multiple broadcast and control signals into a single fiber
optic link.Supporting 3G/HD/SD-SDI video, RS232/422/485 data, audio intercom,
tally, Ethernet, and returnvideo, it enables seamless connectivity for studio and
field production. With uncompressed broadcast-grade transmission, automatic
re-clocking, and hot-swappable modules, it ensures reliable long-distance signal
transport up to 10+ km over SMF. Designed for demanding live production, OB
vans, and professional broadcasting applications.
Features
All-in-One Multiplexing: SDI, Audio, Tally, Intercom, Ethernet & Return Video.
Standards Support: SMPTE 424M/292M/259M & DVB-ASI compliant.
Signal Integrity: Auto equalization & re-clocking for stable SDI delivery.
Flexible Interfaces: RS232/422/485 control, XLR audio, RJ45 Ethernet.
Fiber Performance: 10+Km over SMF, 300m over MMF.
Hot-Swappable Design: Easy installation & maintenance.
Wide Temperature Range: -10°C ~ +75°C for harsh environments.
Compact & Rugged: 1U-ready aluminum housing, 4kg build.
Technical Indexes
| General Specifications |
| Work Temp | -10°C to +75°C |
| Storage Temp | -40°C to 85°C |
| humidity | 0 ~ 95% (non-condensing) |
| Input power | DC5V 3A |
| Power consumption | 15W |
| Net weight | 4kg |
| Appearance size | 172mm*167mm*45mm (LxWxH) |
| Optical Fiber |
| Wavelength | 1310nm / 1550nm / CWDM |
| Output Power | -6~-1dBm |
| Rx sensitivity | <-18dBm |
| Transmission Distance | SM fiber 10+km , MM fiber 300m |
| Optical connector | Dal LC /FC/ST/SC/MX/ Lemo / Neutrino (optional) |
| SDI input/output |
| Signal format | SMPTE 424M, SMPTE 292M, SMPTE 259M |
| Data rate | 270Mbit/s - 1.48Gbit/s - 3Gbit/s |
| Cable Equalization | Automatic cable EQ (Bel den 1694A cable) |
| 250m @ 270Mbit/s, 140m @ 1.5Gbit/s, 80m @ 3Gbit/s |
| SDI interface | BNC 75 Ohm |
| Intercom |
| Camera Optic Adaptor |
| Interface | 4pin XLR(Male) /5pin XLR(Female)/ 3.5mm headset jack |
| Microphone | Mic inputs with mute and pre-empt |
| Headphone | with volume up or down |
| Audio | Balance or unbalance line level |
| Tally |
| Camera Optic Adaptor |
| Interface | 4pin air head or 3pin mini XLR |
| Output | Dry Contact Closure or wet +12V |
| On: short or +12V |
| Off: open or 0V |
| Remote Control |
| Interface | Terminal Block of Industrial Standard |
| Data | RS422 /RS232/RS485 |
| Ethernet |
| Port | 10/100 Base-T, RJ-45 connector |
| Work mode | Full duplex/half duplex |
| Data Rate | 10 M bps & 100 M bps Ethernet (Auto Adaptive) |
PS:
RS422 Data port assignment and pin connections
For data input and output connections, please note the following pin
assignment:
| Pin Assignment (Screw Terminal Block)
Data format | 1 | 2 | 3 |
| RS422 (3-Wire) | GND | IN/OUT+(A) | IN/OUT-(B) |
3-Wire RS422 Full Duplex Data communication connection diagram:
Transmitter End Receiver End
| User’s Equipment | | DATA PORT (3-PIN) | DATA PORT (3-PIN) | | User’s Equipment |
| GND |  | 1GND | 1 IN(+) |  | TX(+) |
| IN/OUT+(A) |  | 2 IN(-) | 2 IN(-) |  | TX(-) |
| RX(+) |  | 3 OUT(+) | 3 OUT(+) |  | RX(+) |
Application
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3G/HD/SD-SDI Fiber Multiplexer w Audio Ethernet Tally Intercom Images
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