SNLA334 june   2023 DP83867CR , DP83867CS , DP83867E , DP83867IR , DP83867IS , DP83869HM

 

  1.   1
  2.   DP83867 and DP83869 TDR
  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. 2DP83867 and DP83869 TDR Implementation
    1. 2.1 TDR Configuration
    2. 2.2 TDR Algorithm
      1. 2.2.1 TDR Algorithm Example Flow
      2. 2.2.2 TDR Algorithm Matlab Example
  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-20230525-SS0I-N5V1-LZKQ-NQDMJ5NTM8TH-low.svg Figure 1-2 Short Circuit Cable