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Gefen DVI-FM500 Extender


I have had to replace these Gefen extenders at two of my clients’ places. Apparently, the AC adapter that powers them, being the switch-mode type, when they break down, that is it. But one of my client’s place had the transmitter powered by a dongle connected to the DP port of the PC so it gets its power from there, without the need of an external adapter. When I got back to the office, I decided to research these adapters and what they have to offer.

Apparently, these extenders let you extend a DVI source up to 5,000 feet away using a fiber optic extension solution. These DVI-to-fiber modules connect to each other via just two LC fiber optic cable strands. The on the fly EDID programming feature enables quick and correct synchronization of the video resolution to the display without any manual configuration. And that is a fact because they just work. Features-wise:

  • Extends DVI up to 5,000 feet (1500 meters) using single-mode(8/125 µm or 9/125 µm) fiber cable
  • Extends DVI up to 1,500 feet (450 meters) using multi-mode (50 µm or 62.5 µm) fiber cable
  • Supports resolutions up to 1920 x 1200
  • Supports DDWG standard for DVI-compliant monitors
  • EDID Programming feature enables quick and correct sync of source to display
  • Fully supports DVI 1.0 and DDC2B via virtual DDC
  • Supports both singlemode and multimode fiber optic cable types
  • Fiber cable provides immunity from electromagnetic interference (EMI)

One can read up about these rather handy adapters via their webpage. They are pretty pricey though but they are worth the money

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