EDA SIMULATION AND MEASUREMENT ISI-USB4 Loss Modeling Kit - A 10-56 Gbpsec Advanced SERDES Intersymbol Interference Loss Platform

The ISI-USB4 represents the next generation of Wild River Technology platforms with controlled amounts of ISI for creating jitter to 56 Gbpsec NRZ and 112 Gbpsec PAM-3 and PAM-4. True Intersymbol Interference (ISI) is created by loss generated with dielectric and skin effect only. Group delay variation, an important loss consideration for data rates exceeding 25 Gbpsec, has been minimized with special layout techniques, pristine connector launches, and the use of controlled weave dielectric material.

The ISI-USB4 Loss Modeling Kit is composed of 24 stripline differential pairs of various lengths. Ground vias surrounding each structure preserve jitter spectral purity by suppressing unwanted resonance. More information: This email address is being protected from spambots. You need JavaScript enabled to view it.

The ISI-USB4 has the following features:

  • Designed for DisplayPort 2.0 Sink and USB4 Rx Channel Calibration

ISI-USB4 Test Fixture & Cable Kit Includes:

  • 24 Low Loss to High Loss Structures
    • *IL = Varied 2-10 dB @ 5GHz and @10GHz
    • Very low return-loss -30dB at 10GHz
    • IEEE P370 Tier 1 Signal Integrity rated
  • Set of Matched Cable Pairs for Tx & Rx Testing
    • Set of two 1m & two 0.5m Matched Pairs
    • *Phase matching less than ±5º @ 40 GHz (347 femto-seconds!)
    • *Max IL to 10GHz < 1.5dB
  • Ruggedized Case with Custom Foam


  • SERDES Receiver Tolerance Testing
  • Communication Channel Optimization using DFE, FFE, CTLE, and Gain Stage Elements
  • Jitter Analysis and Benchmarking
  • Related Products — XTALK-56 (coming Spring 2020)


ISI-USB4 board set with caseISI-USB4 board set with caseMatched cable pairs, with s-parameter thumb drive