3G-SDI fiber system

Lightem Systems 3G series digital video fiber optic transmission system is designed to transmit a 2970Mbps 3G-SDI super high definition digital video / 1485Mbps HD-SDI high definition digital video / 270Mbps SDI standard definition digital video or DVB-ASI stream through one singlemode or multimode fiber with the standards of SMPTE424M, SMPTE292M, SMPTE259M, SMPTE297M, SMPTE305M, SMPTE310M.
Lightem Systems 3G series transmitter provides one 3G/HD/SD-SDI input, and one loop-through for local monitoring. The receiver outputs 2-way parallel 3G/HD/SD-SDI digital video. The transmitter is equipped with auto-cable equalization circuit, and cable driver circuit available at receiving end. Thanks to the Signal jitter elimination circuit, high quality signal transmission over long distance fiber cable is realized through our converters.


  • 3G-SDI/HD-SDI/SDI/ASI signal auto recognition, need not select by hand
  • Compliant with the standards of SMPTE424M,SMPTE292M, SMPTE259M, SMPTE297M, SMPTE310M, SMPTE305M
  • Compliant with the standard of DVB-ASI
  • Auto adaption to the speed of HDSDI/SDI 143M,177M,270M,360M,540M,1483.5M,1485M,2970Mbps,or DVB-ASI
  • When signal input, with automatic cable equalization function, and when signal output, with driver function
  • With re-clocking function at transmitter and receiver
  • Perfect LED indicators design, very convenient to monitor transmitter and receiver work well or not.
  • PCB boards made with environment friendly Pb-free
  • PCB boards made with multilayer design, to ensure stable and reliable signal transmission
  • All components, including connectors, are ordered from public-known manufacturers in the world, high stability and reliability ensurance
  • Enclosure box material is made of aluminum, elegant appearance, light weight
  • Dual switching power supply design, wide voltage range, reliable long-term running
  • A variety of installation options: 15-slot rack(2RU), 16-slot rack(3RU), particularly suitable for large volume optical transmission platform construction, and also available for 4-slot rack(1RU), 2-slot(1RU) rack and single-slot mini rack, fixed 19-inch 1RU box, mini small box
Video Input
Signal Standard SMPTE424M,SMPTE292M,SMPTE259M,SMPTE297M,
Number of Input          1 plus 1 loop-through
Data Rate 19.4Mbps to 2.97Gbps
Resolution 10 Bit
Signal Level   >380mVp-p
>100m@2970Mbps, Belden 1694A cable)
>200m@1.485Gbps, Belden 1694A cable)
>350m@270Mbps, Belden 1694A Cable)
Input Return Loss >10dB@2970Mbps
Impedance 75Ω
Connector BNC
Video Output
Channel Capacity 2
Signal Level 800mVp-p±10%
3G-SDI Rise/Fall time <135ps@2970Mbps
HD-SDI Rise/Fall time <270ps@1485Mbps
SDI Rise/Fall time <0.6ns@270Mbps
3G-SDI Jitter <0.3UI
HD-SDI Jitter <0.2UI(134ps)@100kHz <1.0UI(673ps)@10Hz
SDI Jitter <0.2UI(740ps)@10Hz
Impedance 75Ω
Connector BNC
Dimension(HxWxD, mm)
19-inch 1RU Mini Box
Modular card
15-slot rack
1-slot mini rack
16-slot rack
Dual Power Supply 130 – 260VAC,50-60Hz
Power Consumption <10W
Temperature 0 to +70 Degree
Humidity 0 to 95% RH Non-condensing
LED Status Indicator Power, Optical Link, Video Activity
Fiber optic Link
Fiber Type Single mode
Number of fiber 1
Wavelength 1310nm or 1550nm
Distance 0 to 40km, or 0-80km, or 0-100km optional
Connector FC/PC, or SC/PC

Descriptions: 3G HDSDI Fiber optic converter pair card type
XX – SM: Singlemode
MM: Multimode
XX- SA: Standalone with internal power supply
92: 2slots 1U 19” unit, with redundant power supply
94: 4slots 1U 19” unit, with redundant power supply
95: 15slots 2.2U 19” unit, with redundant power supply