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10GBASE-CX4 Study Group

This study group, led by Chris Di Minico at CDT Corporation, focuses on establishing transmission characteristics for 10GBASE-CX4 cable assemblies, specifically designed for InfiniBand applications. Key specifications include analyzing parameters such as impedance, insertion loss, pair-to-pair skew, and jitter across a 10-15 meter range using 24 AWG cabling. The objective is to ensure compliance with 10GBASE-CX4 and InfiniBand electrical requirements while providing worst-case HSPICE models for rigorous testing. The insertion loss must be less than TBD dB from TBD MHz to TBD GHz.

july
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10GBASE-CX4 Study Group

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  1. 10GBASE-CX4 Study Group Chris Di MinicoCDT Corporation cd@mohawk-cdt.com

  2. Channel Specification Development • PAR Objective • 10-15 meter (24 AWG) - InfiniBand Cable Assembly • EstablishTransmission Characteristics (worst case) • Impedance • Impedance Deviation • Insertion Loss • Pair-to-Pair Skew • Jitter • Return Loss • MDNEXT • other • HSPICE(?) Models for worst case

  3. 10GBASE-CX4 Cable Assembly Characteristics 4X InfiniBand Cable Assembly InfiniBand 4X Electrical Requirements (1.25 GHz) 10GBASE-T Additional Electrical Requirements (1.56 GHz)

  4. 10GBASE-CX4 Compliance Channel 10GBASE-CX4- Compliance Channel Insertion loss: The insertion loss of each pair of the CX4 cable assembly shall be less than: Insertion_Loss(f) < TBD (dB) at all frequencies from TBD MHz to TBD GHz. This includes the attenuation of the differential cabling pairs, and the connector (i.e., the assembly).

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