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Table of Contents
ii
1502C MTDR User Manual
Appendix D: Application Note D–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pulse Echo Testing of Electrical Transmission Lines
Using the Tektronix Time-Domain Reflectometry Slide Rule D–1. . . . . . . . . . .
Terms and Symbols D–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Relationships D–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VSWR vs. Percent Reflected Voltage D–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Return Loss (dB) vs. Percent Reflected Voltage D–3. . . . . . . . . . . . . . . . . . . . . . . . .
Percent Reflected Voltage vs. Characteristic Line Impedance D–4. . . . . . . . . . . . . .
Percent Reflected Voltage vs. Load Resistance D–6. . . . . . . . . . . . . . . . . . . . . . . . . .
Characteristic Line Impedance or Load Resistance vs. Reflection Amplitude D–6. .
Centimeters vs. Inches or Meters vs. Feet D–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dielectric Constant vs. Velocity Factor D–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Time vs. Short Distances, in Centimeters or Inches (any dielectric) D–8. . . . . . . . . .
Time vs. Long Distances, in Meters or Feet (any dielectric) D–9. . . . . . . . . . . . . . . .
Glossary
Index