Physical Layer
- Incorporates the NEW, TSB81BA3D, the latest revision of Texas Instruments’ 1394b PHY, providing fully reliable 1394b speed and configuration.
- Fully Supports Provisions of IEEE P1394b Revision 1.33+ at 1-Gigabit Signaling Rates
- Fully Supports Provisions of IEEE 1394a-2000 and 1394-1995 Standard for High Performance Serial Bus
- Fully Interoperable With Firewire™, i.LINK™, and SB1394™, Implementation of IEEE Std 1394
- Provides Two (2) Fully Backward Compatible, (1394a-2000 Fully Compliant) Bilingual P1394b Cable Ports at up to 800 Megabits per Second (Mbits/s)
- Low-Power Sleep Mode
- Cable Power Presence Monitoring
- Cable Ports Monitor Line Conditions for Active Connection to Remote Node
Enhanced Glass Optical Fiber Connector
- LC duplex Connector optical interface.
- 850 nm Vertical cavity surface emitting laser.
- Maximum link lengths:
- 275 m Links in 62.5/125 µm MMF 200 MHz*km Cables
- 550 m Links in 50/125 µm MMF 500 MHz*km Cables
- IEC 60825-1 Class 1/CDRH Class 1 Laser Eye Safe
- IEEE 802.3 Gigabit Ethernet (1.25 Gbd) compliant
Temperature/Humidity
- Operation: -0 oCto +70 oC / 20 to 80 % rel. non cond.
- Storage: -10 oC to +60 oC / 20 to 95 % rel. non cond.
Physical Parameters
- Dimensions (W x H x D): 94.45 x 25.10 x 85.61 mm
- Weight: 266 gram
- Housing: Galvanized Steel, painted with polyester powder
- Power consumption: 125mA @ 12V = 1.5W (typical) / 280mA @12V = 3.3W (max)
- Operation LED

DC power in:
+12V / 3A. The jack plug of the DC adapter has the following dimensions and polarity as on the next figure.
Power consumption (at 12V DC): 1.0 W
Glass Optical Cables Supported:
- 220 m LC to LC 62.5/125 um MMF 160 MHz*km Cables
- 275 m LC to LC 62.5/125 um MMF 200 MHz*km Cables
- 500 m LC to LC 50/125 um MMF 400 MHz*km Cables
- 550 m LC to LC 50/125 um MMF 500 MHz*km Cables
Glass Optical Cables Tested:
- 100 m LC to LC 50/125 µm MMF
- 20 m LC to LC 50/125 µm MMF
FCC / CE Compatibility and EMI, EMC testing
GOF Repeater™ has successfully passed the EN 55022 (Emissions Environment) and EN 55024 (Immunity Environment) EMI test procedures. Subsequently, this product is fully CE compliant and assigned with the CE mark. Moreover the board is FCC compliant.
Environmental Compliances
- RoHS Compliant
- WEEE Compliant
Case Studies
Unibrain, having huge experience in Firewire technology has tested and recommends the following basic applications and configurations for the GOF Repeater800™
Case A : Connection of two (2) hosts

Connect one (1) PC or Macintosh, having 1394a or 1394b interface, to an GOF Repeater800™ via one 9-6 or 9-9 cable. Connect the two GOF Repeater800™ via Glass Optical Fiber Cable (up to 550 meters). Connect the second repeater via one 9-6 or 9-9 cable to the other PC or Macintosh.
Case B : 1394a/b cameras

Connect one (1) PC or Macintosh, having 1394a or 1394b interface, to an GOF Repeater800™ via one 9-6 or 9-9 cable. Connect the two GOFRepeater800™ via Glass Optical Fiber Cable (up to 550 meters). Connect the second repeater via 9-6 or 9-9 cables to 1394a or 1394b cameras. NOTE: In this case it is mandatory the usage of the 12V power supply in order to provide current to the repeater that is connected to the cameras.
Case C : External SBP-2 HDD

Connect one (1) PC or Macintosh, having 1394a or 1394b interface, to an GOF Repeater800™ via one 9-6 or 9-9 cable. Connect the two GOF Repeater800™ via Glass Optical Fiber Cable (up to 550 meters). Connect the second repeater via 9-6 or 9-9 cables to 1394a or 1394b external HDD. NOTE: In this case it is optional the usage of the 12V power supply in order to provide current to the repeater that is connected to the HDD, provided that the HDD receives external power.
Case D : DV camcorder

Connect one (1) PC or Macintosh, having 1394a or 1394b interface, to an GOF Repeater800™ via one 9-6 or 9-9 cable. Connect the two GOF Repeater800™ via Glass Optical Fiber Cable (up to 550 meters). Connect the second repeater via 9-6 or 9-9 cables to the DV camcorder. NOTE: In this case it is mandatory the usage of the 12V power supply in order to provide current to the repeater that is connected to the DV camcorder.