SNLA266B August   2016  – April 2025 DP83822H , DP83822HF , DP83822I , DP83822IF , DP83825I , DP83826E , DP83826I

 

  1.   1
  2.   DP8382x IEEE 802.3u Compliance and Debug
  3.   Trademarks
  4. 1Terminology
  5. 2Standards and System Requirements
    1. 2.1 Standards
    2. 2.2 Test Equipment Suppliers
    3. 2.3 Test Equipment Requirements
  6. 3Ethernet Physical Layer Compliance Testing
    1. 3.1 Standard Test Setup and Procedures
    2. 3.2 100BASE-TX Compliance Testing
      1. 3.2.1 Template (Active Output Interface)
      2. 3.2.2 Differential Output Voltage
      3. 3.2.3 Rise and Fall Time
      4. 3.2.4 Waveform Overshoot
      5. 3.2.5 Jitter
      6. 3.2.6 Duty Cycle Distortion
      7. 3.2.7 Return Loss
    3. 3.3 10BASE-Te Compliance Testing
      1. 3.3.1 Link Pulse
      2. 3.3.2 10BASE-Te Standard
        1. 3.3.2.1 TP_IDL
        2. 3.3.2.2 MAU, Internal
        3. 3.3.2.3 Jitter With TPM
        4. 3.3.2.4 Jitter Without TPM
        5. 3.3.2.5 Differential Voltage
        6. 3.3.2.6 Common-Mode Voltage
        7. 3.3.2.7 Return Loss
        8. 3.3.2.8 Harmonic Content
  7. 4How to Tune DP83825 VoD Swing
    1. 4.1 Example of Tuning DP83825 VoD Swing
  8. 5IEEE802.3u Compliance Testing Scripts for the DP8382x
  9. 6References
  10. 7Revision History

3.2.4 Waveform Overshoot

Purpose: To verify that the waveform overshoot is below the specified bound.

Pass Condition: The overshoot (both positive and negative maximum voltage level on transition) must not exceed 5% over the steady-state voltage level.

100BASE-TX Waveform Overshoot ExampleFigure 3-6 100BASE-TX Waveform Overshoot Example