Mini-type 3G-SDI to Fiber Converter with Tally & Reverse RS485
Model: LNK-M3G-1V Series
Overview
The LNK-M3G-1V Series is a compact, high-performance Mini-type
3G-SDI to Fiber Converter
with Tally & Reverse RS485, specifically engineered to integrate
multi-signal transmission into
a space-saving mini form factor—ideal for scenarios where
installation space is limited, such
as portable broadcast setups, compact control cabinets, on-site
surveillance deployments, or
small-scale live production environments. As a Mini-type 3G-SDI to
Fiber Converter with Tally
& Reverse RS485, it combines reliable 3G/HD-SDI video transmission
with essential auxiliary
signals, catering to professional fields that demand both
miniaturization and multi-functional
integration for efficient workflow operations.
This converter supports synchronized transmission of 1-channel
3G/HD-SDI video signals
(with embedded audio for seamless audio-video synchronization),
1-channel Tally signal, and
1-channel Reverse RS485 data signals via a single fiber optical
cable—eliminating the need
for multiple independent cables, simplifying on-site infrastructure
deployment, and reducing
overall installation and maintenance costs. It is equipped with a
local 3G/HD-SDI loop output,
allowing users to monitor the source video signal in real time at
the transmitter end; this real-
time monitoring function ensures signal integrity before
long-distance transmission, facilitates
quick troubleshooting in professional workflows, and avoids
potential issues caused by signal
loss, distortion, or degradation in complex environments.
The Mini-type 3G-SDI to Fiber Converter with Tally & Reverse RS485
is supplied as a complete
functional set, including one dedicated transmitter unit and one
matching receiver unit, which
work together to form a stable, full-duplex transmission link. It
is optimized for 1080P 3G/HD-
SDI signal transmission, ensuring crisp, broadcast-grade video
quality that meets the standards
of professional AV applications—whether used in live event
streaming, studio monitoring, or high
-definition surveillance. Meanwhile, the converter maintains
backward compatibility with HD-SDI
formats, making it flexible enough to adapt to existing HD-SDI
systems, avoiding the need for full
infrastructure overhauls when upgrading or expanding.
The integrated 1-channel Tally signal function is critical for
professional broadcast and live production
scenarios, enabling real-time status indication of video sources
(such as “on-air” active status or
“preview” standby status) to help production teams coordinate
smoothly and avoid operational errors.
The 1-channel Reverse RS485 function supports bidirectional serial
data communication, allowing
remote control of connected devices like PTZ cameras, studio
lighting controllers, or industrial monitoring
equipment from the receiver end—enhancing operational flexibility
and reducing the need for on-site
manual adjustments. With its compact mini design, stable
multi-signal transmission, and broadcast-
grade video performance, this converter is ideal for professional
scenarios including portable broadcast
studios, live event video transmission, mid-scale HD surveillance
networks, and remote industrial monitoring
systems. It effectively resists electromagnetic interference (EMI)
and signal attenuation over long fiber
distances, ensuring consistent HD video quality, reliable Tally
status feedback, and smooth Reverse RS485
control—making it a practical, cost-effective solution for modern
professional 3G-SDI video transmission needs.
Features
► Each channel includes 8-channel audio embedded;
► Automatic cable equalization, used for all rate below 3.2 Gb/s
(Belden 1694A);
► Automatic reclocking 270Mbit/s - 1.48Gbit/s - 3Gbit/s
► Directly compatible with SDI camera systems
► Long transmission capability up to 80 km
► Hot swap and hot plug;
► Handle all Pathological patterns, fully digital non-compression
broadcast level transmission;
► LED Status Indication to monitor the working conditions;
► super optic dynamic range and free of adjustment;
► 1470~1610nm CWDM wavelengths optional;
► industry level ultra-broad temperature range (-20℃~+70℃), adaptable
to various environments;
Technical Indexes
Fiber Optical interface |
Fiber interface | Simplex LC |
Transmission distance | 550m-20Km |
Wavelength | 1310nm/1550nm |
Video |
Video interface | BNC |
Video input/output impedance | 75Ω |
Video input/output voltage | Typical:1Vpp, Min 0.5Vpp, Max 1.5Vpp |
Video Bits Rate | Max 3.2Gb/s |
Differential gain (10%～90% APL) | <1% |
SDI format support | 625/25 PAL |
525/29.97 NTSC, 525/23.98 NTSC |
720p50, 720p59.94 |
1080i 23/24/30/50/59.94 |
1080P 23.98/24/30/50/60 |
Video SDI standard | 270Mbps (SD-SDI), 1.485Gbps/M(HD-SDI) |
SMPTE425M3Gb/s Mapping(3G-SDI) |
SMPTE424M 3Gb/s serial interface(3G-SDI) |
Data |
Physical interface | Industrial standard screw terminal |
Data type | Tally & Reverse RS485 |
Frequency/Rate support | Max. 115200bps for RS422 Max. 57600bps for RS485 |
BER | <10ˉ9 |
Electrical |
Power adaptor | DC 5V |
Power consumption | <5W |
LED Indicator |
SDI | SDI video |
P/T | Power Supply |
Mechanical |
Dimensions (LxWxH) | 73 x 44 x 17 mm (TX) 73 x 44 x 17 mm (RX) 185 x 132 x 100 mm (Package) |
Weight | 75g (TX) 75g (RX) 450g (Package) |
Casing | Aluminum Case |
Mounting Options | Desktop |
Environmental |
Working Temperature | -20℃～+70℃ |
Storage Temperature | -40℃～+80℃ |
Working Humidity | 0~95% |
MTBF | ≥100000 hours |
Ordering information
Model | Description |
LNK-M3G-1V-MM | Mini-type 3G-SDI to Fiber Converter with Tally & Reverse RS485 and loop out, MMF, LC Fiber Connector 500 meters, including Transmitter and Receiver, used by pairs |
LNK-M3G-1V-20 | Mini-type 3G-SDI to Fiber Converter with Tally & Reverse RS485 and loop out, SMF, LC Fiber Connector 20KM, including Transmitter and Receiver, used by pairs |
LNK-M3G-1V-40 | Mini-type 3G-SDI to Fiber Converter with Tally & Reverse RS485 and loop out, SMF, LC Fiber Connector 40KM, including Transmitter and Receiver, used by pairs |
Application
