Part 5: What is the spectrum of a signal? What is the relationship between the s
ID: 3736669 • Letter: P
Question
Part 5: What is the spectrum of a signal? What is the relationship between the spectrum of a signal and the bandwidth of a channel? (Use the textbook; you'll likely get a wrong answer from a web search!)
Part 6: Name and briefly describe the three characteristics of a sine wave signal that can be modulated to allow the signal to carry information.
Part 7: Explain how frequency division multiplexing can be used to carry two or more independent information streams on one communication medium.
Part 8: A modern CPU has a bit that can place the CPU in the system state or the application state. Briefly describe the difference between "system state" and "application state."
Explanation / Answer
ANS:-
signal spectrum:-
By Fourier theory, any waveform can be represented by a summation of a possibly infinite number of sinusoids, each with a particular amplitude and phase. Such a representation
Any signal with any funny shape (square, triangle, sawtooth, whatever) can be written as the sum of pure sine waves. The fourier transform is the mathematical recipe
bandwidth:-
Bandwidth' describes the rate at which data can be transferred to your computer from a website or internet service within a specific time. Therefore the amount of bandwidth you have the bandwidth 'strength' determines the efficiency and speed of your internet activity – that is, when you open web pages, download files and so on.
What is the relationship between a signal's spectrum and its bandwidth:-
The spectrum of a signal is the range of frequencies contained in the signal. The bandwidth is the difference between the lowest and highest frequency in the spectrum. It is therefore the width of the spectrum and is a measure of the information carrying capacity of the signal.
what is modulated:-
The process of impressing low-frequency information to be transmitted on to a high-frequency wave, called the carrier wave, by changing the characteristics of either its amplitude, frequency, or phase angle is called modulation.
what is signal:-
In telecommunications, a carrier wave, carrier signal, or just carrier, is a waveform usually sinusoidal that is modulated modified with an input signal for the purpose of conveying information. This carrier waveusually has a much higher frequency than the inputsignal does.