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Do You Need Mode Conditioning Patch Cords?

AMG´s Mode Conditioning fibre patch cables improve quality & distance of signals over a pre-installed Multimode fibre back bone - avoiding the need to dig up existing fibre.

AMG Systems supplies Mode Conditioning fibre patch cables in 62.5/125 and 50/125, which are specified for 1000Base-LX and 10GBase-LRM transceivers transmitting in the 1310nm wavelength window. Different connectors types available.
These cables are used to adapt the single mode output of Gigabit Ethernet (1000Base-LX) transceivers to a multimode cable network. The cables are compliant with IEEE 802.3 and have applications in Local Area Networks, Telecommunication Systems and Metropolitan Area Systems.
As many installation use traditional multimode fibre, there is a potential problem running Gigabit data to distances greater then 300-500m. These avoid the necessity to dig up the fibre installed between two buildings. Simply plug a mode conditioning cable into each end, between the fibre distribution patch panel and appropriate Gigabit switch. This then allows true Gigabit data flow above distance of 500m.

Benefits - Designed for the job

  • Single-mode to Multimode conversion
  • Solutions in 62.5/125 and 50/125
  • Compliant with IEEE 802.3 standards
  • For 1310nm optical wavelength window
  • Centreline offset
  • Different connector colour design
  • Low insertion loss connectors
  • Increased transmission distance

What is Mode Conditioning?

Transceiver modules used in Gigabit Ethernet (1000Base-LX) launch only single mode (1310nm) long wave signal. This poses a problem if an existing fibre network utilises multimode cable.
When a single mode signal is launched into a multimode fibre a phenomenon known as Differential Mode Delay (DMD) can create multiple signals within the multimode fibre. This effect can confuse the receiver and produce errors. Mode Conditioning cables utilised an offset between the single-mode fibre and the multimode fibre to eliminate DMD allowing use of 1000Base-LX over existing multimode fibre cable systems.

Some Tips when using a Mode Conditioning Fibre Patch Cord

  • Mode conditioning patch cords are always used in pairs. Which means that you will need a patch cord at each end
  • If your 1000BASE-LX transceiver module is equipped with SC or LC connectors, please be sure to connect the yellow leg (single-mode) of the cable to the transmit side, and the orange leg (multimode) to the receive side of the equipment.
  • Mode conditioning patch cords can only convert single-mode to multimode. If you want to convert multimode to single-mode, then a media converter will be required.
  • Besides, mode conditioning patch cables are used in the 1310nm optical wavelength window, and should not be used for 850nm short wavelength window such as 1000Base-SX.


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