SNLA428 june   2023 DP83826E

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Time Domain Reflectometry
    1. 1.1 Example Connections
      1. 1.1.1 Open Circuit Cable
      2. 1.1.2 Short Circuit Cable
  5. 2TDR Implementation
    1. 2.1 DP83826 TDR Configuration
    2. 2.2 TDR Algorithm
      1. 2.2.1 TDR Algorithm Example Flow
      2. 2.2.2 TDR Algorithm Matlab Example Code
  6. 3Summary
  7. 4References

1.1.2 Short Circuit Cable

Short-circuited cables also generate a strong reflection, but this reflection is out-of-phase with the original pulse (negative polarity). Any kind of capacitive impedance discontinuity generates out-of-phase reflection. The amplitude depends on the amount of impedance discontinuity.

GUID-333D24F8-2E94-4143-9691-B6995E08EC64-low.gif Figure 1-2 Short Circuit Cable