# Nt1310 Unit 7 Exercise 1

Topics: Light, Refraction, Snell's law Pages: 2 (593 words) Published: August 20, 2013
NT1310
Unit 7 Exercise 1
1. Crosstalk: A disturbance caused by electromagnetic interference, along a circuit or a cable pair. A telecommunication signal disrupts a signal in an adjacent circuit and can cause the signals to become confused and cross over each other 2. Waveguides: A circular, elliptical or rectangular metal tube or pipe through which electromagnetic waves are propagated in microwave and RF communications. The wave passing through the medium is forced to follow the path determined by the physical structure of the guide. 3. FTTH: Short for fiber-to-the-home, the installation of optical fiber from a telephone switch directly into the subscribers home. Fiber optic cable is an alternative to coaxial cable. 4. Simplex: refers to one-way communications where one party is the transmitter and the other is the receiver. An example of simplex communications is a simple radio, which you can receive data from stations but can't transmit data. 5. Half-Duplex: Refers to the transmission of data in just one direction at a time. 6. Full-Duplex: Refers to the transmission of data in two directions simultaneously 7. Photodiode: component that light energy into electrical energy. Receiving end of fiber optic connection 8. Amplitude Modulation: done by varying the amplitude of a light wave 9. Analog transmission: signal that varies continuously through time in response to an input 10. Digital Transmission: refers to data transmission in binary values 11. Sample Rate: Typically expressed in samples per second, or hertz (Hz), the rate at which samples of an analog signal are taken in order to be converted into digital form. A PCs sound card typically will sample a received analog signal, such as through a microphone, and digitize it for use by the computer. A higher sampling rate provides a better quality reproduction than a lower sampling rate. 12. Electromagnetic Wave: refers to the complete range of wavelengths of...