Large Coaxial Cable Samples
Large Coaxial Cable Samples
BNC Cables and Oscilloscope
pulse generator
Delay Cable Oscilloscope Trace

 

Code Number: 5N10.28

Demo Title: Coaxial Cable - Delay Line

Condition: Excellent

Principle: Cable Design

Area of Study: Electricity & Magnetism

Equipment: 

Large Coaxial Cable Samples, Oscilloscope, Wave Generator, and Long and Short BNC Cables.

Procedure:

No advanced notice is required for the show and tell coax cables unless smaller diameters of cable are desired.

The delay line will work as shown with the pulse generator.  However, using one of the Wavetek function generators will give you a smoother and more measureable oscilloscope trace.

References:

  • Herman Erlichson, "Kelvin and the Trans-Atlantic Cable", TPT, Vol. 44, #7, Oct. 2006, p. 426.
  • Se-yuen Mak, "Speed of Electromagnetic Signal Along a Coaxial Cable", TPT, Vol. 41, #1, Jan. 2003, p. 46.
  • Levi Gray, "Fast Pulses in a Coaxial Cable", TPT, Vol. 23, #2, Feb. 1985, p. 91.
  • Vinicius M. Lenart, Romeu M. Szmoski, Rozane F. Turchiello, Sergio L. Gomez, "Standing Waves in a Coaxial Cable:, A Simple and Low-Cost Experiment for an Instructional Wave Laboratory", AJP, Vol. 89, #1, Jan. 2021, p. 105.
  • J. S. Bobowski, "Modeling and Measuring the Non-Ideal Characteristics of Transmission Lines", AJP, Vol. 89, #1, p. 96, Jan. 2021
  • Alain Haché and Abderrahim Slimani, "A Model Coaxial Photonic Crystal for Studying Band Structures, Dispersion, Field Localization, and Superluminal Effects", AJP, Vol. 72, #7, July 2004, p. 916.
  • Se-yeun Mak, "Speed of Radio Waves Along a Coaxial Transmission Line", AJP, Vol. 72, #5, May 2004, p. 671.
  • George H. Watson, "Transmission Line Exercises for the Introductory Physics Laboratory", AJP, Vol. 63, #5, May 1995, p. 423.
  • F. Holuj, "Simple Measurements Involving Transmission Lines", AJP, Vol. 50, #3, Mar. 1982, p. 282.
  • John Moore, Christopher Davis, and Michael Coplan, "6.2", Building Scientific Apparatus, p. 374 - 378.
  • W. R. Thurston, "The Measurements of Cable Characteristics (Part II)", The General Radio Experimenter, Vol. 32, #1, June 1957.
  • Horatio W. Lamson, "The Measurements of Cable Characteristics", The General Radio Experimenter, Vol. 31, #12, May 1957.
  • F. D. Lewis and Robert M. Frazier, "A New Type of Variable Delay Line", The General Radio Experimenter, Vol. 31, #5, Oct. 1956.
University of Maryland Physics Department QOTW Question #227
University of Maryland Physics Department QOTW Answer #227