TTMER19: OTDR - Optical Time Domain Reflectometer
Control questions
You must give an answer to 5 questions at the beginning of the laboratory exercise. One wrong answer will make the mark given to the measuring with one grade worse. Two or more wrong answers will result a supplementary measuring! You will not find any answers in the aid for questions with subject of circuit diagrams! We would like to learn about the creative abilities of students here.
- Give the wavelengths of the three optical window.
- What is the physical background of the Rayleigh scattering?
- What is Fresnel reflection? How much is the general value of it in case of polished fibre?
- How does the absorption attenuation affects the whole fibre attenuation being measured?
- At 1550 nm, or at 1300 nm would be the fibre attenuation bigger? Why?
- What sort of factors affects the resolution?
- What is dead zone?
- When can radiation loss appear?
- What is the definition of the dynamic range?
- Draw the block scheme of OTDR.