Following Assignment

Please answer the following questions, you earth-closet transfer your answers In a MS Word flee, or Word file. Answer all the questions, and upload the answers back before Sunday March 31, 2013 (before 11 55 pm) 1 . Differentiate in the midst of guided media and unguided media 2. What be three grievous characteristics of a bimestrial b slight 3. Define organic oftenness 4. What Is fading? 5. Describe the components of optical type cable. 6. suggest somewhat signifi substructuret differences between broadcast radio and microwave. 7. What Is the difference between diffraction and scattering? . Last and pre directly define important factors that can be apply in evaluating or comparing the various digital-to- digital encoding techniques. 9. What function does a modem action? 10. What Is JAM? Differentiate between guided media and unguided media Gulled media Is that where we use both path for communication like cables (coaxial, fiber optic, twisted pair) etc. unguided med ia is in like manner called wireless where not any physical path is used for transmission. What are three important characteristics of a periodic repoint? power point (or frequency), amplitude and bod. All periodic notes can be broken mastered into opposite signals Cost comm but Selene/coolness waves, but in that location are others too. These components will each have their own frequency, amplitude and phase that combine into the original signal. The strange part of the question is the phase. A signal on its own does not have a phase unless you generate some reference signal to compare it to. Generally, this comparison signal Is Implied by the context of your particular situation.When you decompose a periodic signal into components, however, it is almost always implied that the phase of each component is in reference to the fundamental component (So the fundamental has phase O. Hill the others have phases referenced to that). This is do specifically so that each component will combine to bring forth the original signal. Define fundamental frequency. What Is attenuation? The fundamental frequency, often referred to exactly as the fundamental, is defined as the lowest frequency of a periodic waveform.In terms of a superposition of sinusoids The fundamental frequency Is the lowest frequency sinusoidal in the sum. In some contexts, the fundamental is usually abridge as of (or IF), indicating the lowest frequency counting from zero. In other contexts, it is more common to abbreviate It as FL, the first harmonic. The second harmonic Is accordingly if = off, etc. In this context, the zeros harmonic would be O Hzs. )All sinusoidal and more non-sinusoidal waveforms are periodic, which Is to say they repeat exactly over time. Describes the signal completely.We can show a waveform is periodic by finding some period T for which the following equation is true Reduction of signal strength during transmission. Attenuation is the opposite of amplification, an d is normal when a signal is sent from one point to another. Describe the components of optical fiber cable. An optical fiber is a flexible, transparent fiber made of glass (silica) or plastic, meagrely hickey than a human hair. It functions as a waveguide, or sluttish pipe, to transmit light between the two ends of the fiber.The field of use science and engineering concerned with the design and application of optical fibers is cognise as fiber optics. Optical fibers are widely used in fiber-optic communications, which permits transmission over longer distances and at higher bandwidths ( information rates) than other forms of communication. Fibers are used instead of metal wires because signals travel along them with less loss and are also immune to electromagnetic interference. Fibers are also used for illumination, and are wrapped in bundles so that they may be used to carry images, thus allowing viewing in confined spaces.Specially intentional fibers are used for a variety of other applications, including sensors and fiber lasers. Indicate some significant differences between broadcast radio and microwave. FL intercommunicate is approximately 50 Kilohertz to 400 Kilohertz. AM Broadcast Band Radio is ab erupt 500 Kilohertz to 1600 Kilohertz. And microwave begins around 2000 Mesh and goes up thru. most frequency ranges like 26,000 Mesh in allocated bands, depending upon the type of go youre operating. What is the difference between diffraction and scattering?Diffraction is a phenomenon observed only in waves, but scattering is a phenomenon observed in both waves and elements. Diffraction is a property of propagation of waves, whereas scattering is a property of wave interactions. Diffraction can be taken as evidence for the wave nature of light. Some forms of scattering (Compton scattering) can be taken as evidence for the particle nature of light. List and briefly define important factors that can be used in evaluating or comparing the various digit al-to-digital encoding techniques. digital signals dont have large ranges, nor do they reflect constant activity.Digital signals have very few values. Each signal is unique from a previous digital value and unique from one to come. In effect, a digital signal is a snapshot of a condition and does not represent insistent movement In comparing analog and digital signals, advantages lie on either end of the spectrum. Analog signals suffer far less from attenuation over long distances. This rather makes sense. Since digital data can only be a 1 or O, what happens when a signal becomes so weak that it is hard to distinguish between each state? sometimes we Just cant.Analog devices, on the other hand, are equipped to handle the dateless values between 1 and O. Digital devices are a piling less sophisticated, meaning that they are fairly easy to manufacture and cost-effective. In addition, bandwidths than analog systems do. What function does a modem perform? The function of a modem is intonation and Demodulation mean to turn data into a format that can be transmitted via an sound link such as a speech sound line. A modem at the other side of the connection answers the phone and converts the audio back into sable data.This is why if you lift a phone mend the modem is in use there appears to be random noise on the line, this noise is the data in audio What JAM? JAM stands for quadrate Amplitude Modulation. Its a modulation scheme that transmits data by changing the amplitude of two carrier waves. The two carrier waves are out of phase with each other by 90 degrees. Digital melodic line uses JAM to transmit the majority of their signals. Two major JAM schemes are GAMMA and GAMMA. GAMMA contains data throughput around 28 Mbps, where GAMMA has data throughput of 38. 8 Mbps.