Gefen DVI and RS232 Exteneder over Fiber

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Keep volume at the same levels while watching TV:

Are you annoyed by loud commercials when you are watching television? Wouldn't it be nice if there was a way to keep the volume constant between commercials, while channel surfing, or when switching between A/V sources without having to worry about the volume button on your remote control? Gefen answers the call with the GefenTV HD Auto Volume Stabilizer w/ Digital Audio Decoder. This product utilizes Dolby® Volume technology and features a Volume Leveler to provide consistent volume levels at all times, and a Volume Modeler to enhance the listening experience and maintain full spectral balance by dynamically adjusting the low and high frequencies at all volume levels. This makes it ideal for watching TV at night without waking up the person in the next room or the neighbors next door. The Volume Stabilizer accepts and outputs Dolby® Digital 7.1, 5.1, 2.1, 2.0, or two-channel LPCM audio. Thanks to its advanced built-in Dolby® Digital decoder, it is capable of mixing down multichannel digital audio to 2 channels if needed. This product features three reference level presets, allowing the user to optimize the Dolby® Volume performance. On-board EDID management provides rapid integration of sources and displays. The Volume Stabilizer never needs to be unplugged because it will automatically be placed in standby mode if a source signal is not detected. The Volume Stabilizer will exit standby mode once a source signal is detected. It can also be controlled from a distance using the included IR Remote. With support for 1080p Full HD and 3DTV pass-through, the GefenTV HD Auto Volume Stabilizer w/ Digital Audio Decoder is an integral part of any home theater system.

How It Works:

Place the GefenTV HD Auto Volume Stabilizer w/ Digital Audio Decoder next to your multimedia entertainment source. Connect an HDMI cable from the source to the HDMI input on the Volume Stabilizer. Connect another HDMI cable from the HDMI output on the Volume Stabilizer to the HDMI input of your TV. Connect the included 5V DC external power supply to the back of the unit. The LED in the front will light up red showing that the unit is in "Standby Mode." Turn on your video source and your TV. Depending upon the audio input format, either the PCM or Dolby® LED will glow bright blue. Press the "Dolby Volume" button to disable or enable the Dolby® Volume Stabilizer. Press the Volume button on the back of the Volume Stabilizer to optimize the system's performance by selecting between three Dolby® Volume reference level presets.


  • Extends DVI up to 1640 feet (500 meters)
  • Extends RS-232 up to 1640 feet (500 meters)
  • Supports resolutions up to 1080p Full HD
  • Supports VESA resolutions up to 1920 X 1200
  • RS-232 port for automation


  • Maximum Pixel Clock: 165 MHz
  • Input Video Signal: 1.2V p-p
  • Input DDC Signal: 5V p-p (TTL)
  • RS-232 Connector (Sender): (1) DB-9, female
  • RS-232 Connector (Receiver): (1) DB-9, female
  • DVI Input Connectors: (2) DVI-I, 29-pin, female (digital only)
  • Link Connector: SC -terminated 50/125µm or 62.5/125µm fiber
  • Operating Temp: 0° - 40° C
  • Power Consumption: 10W per unit (max.)
  • Power Supply: 5V DC
  • Dimensions: 3.4" D x 5.0" W x 1.25" H
  • Shipping Weight: 4 lbs.

Package Includes:

  • (1) DVI Extender with RS232 Over One Fiber Optic Cable - Sender unit
  • (1) DVI Extender with RS232 Over One Fiber Optic Cable - Receiver unit
  • (1) 6 ft. Dual-Link DVI cable (M-M)
  • (1) 6 ft. RS-232
  • (2) 5V DC power supplies (EXT-PS52AULP)
  • (1) User Manual

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