Gore copper SFP+ cable works with limiting modules
Copper cable assembly satisfies the limiting port specification up to 7 meters.
-- Test & Measurement World, 11/20/2009 7:00:00 AM
Leveraging GORE EYE-OPENER+ conductor technology and an extremely low-loss PTFE cable dielectric, W.L. Gore's copper cable assembly fully complies with the SFF-8431 Revision 4.1 specification for SFP+ (Enhanced Small Form Factor Pluggable) limiting modules. The passively equalized GORE Limiting Port SFP+ Assembly serves as a lower-cost alternative to active copper technology and expensive optical transceiver modules, while satisfying the limiting port specification up to 7 meters, without using active technology.
SFP+ limiting ports are not required to provide EDC (Electrical Dispersion Compensation) on the receive side. Eliminating this chip or function has been projected to save $15/port. However, the loss of this function severely limits the distance over which conventional passive copper solutions can interoperate to less than 1 meter. Integrators have been required to purchase active copper or optical transceivers to satisfy the standard. GORE Limiting Port SFP+ Assemblies are specification-compliant up to 7 meters. This 7-meter length spans a significant portion of the total interconnect-space required for typical high-performance computing environments.
The core/skin design of GORE EYE-OPENER+ conductors provides a distributed, or "per unit length," equalization without resistor-inductor-capacitor circuitry required on the connector paddle card. Jitter—well-known to limit the signal transmission length in today's systems—is reduced in equalized cables because the transfer function (frequency response) of the cable is "flattened" in the appropriate frequency band.
For more information about Gore's full line of cables and assemblies, go to www.gore.com/highspeed.
G.L. Gore & Associates, www.gore.com.
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