BANDWIDTH OF SIGNAL
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COMMUNICATION SYSTEMS: BANDWIDTH OF SIGNAL: In a communication system, the message signal can be voice, music, picture or computer data. Each of these signals has different ranges of frequencies. The type of communication system needed for a given signal depends on the band of frequencies which is considered essential for the communication process. For speech signals, frequency range 300 Hz to 3100 Hz is considered adequate. Therefore speech signal requires a bandwidth of 2800 Hz 3100 hertz - 300 hertz for commercial telephonic communication. To transmit music, an approximate bandwidth of 20 kHz is required because of the high frequencies produced by the musical instruments. The audible range of frequencies extends from 20 Hz to 20 kHz. Video signals for transmission of pictures require about 4.2 MHz of bandwidth. A TV signal contains both voice and picture and is usually allocated 6 MHz of bandwidth for transmission.In the preceeding paragraph, we have considered only analog signals. Digital signals are in the form of rectangular waves as shown in Figure. However, for practical purposes, the contribution from higher harmonics can be neglected, thus limiting the bandwidth. As a result, received waves are a distorted version of the transmitted one. If the bandwidth is large enough to accommodate a few harmonics, the information is not lost and the rectangular signal is more or less recovered. This is so because the higher the harmonic, less is its contribution to the wave form.
Пікірлер: 39
God?
Yeh topic ncert mein samajh aata toh kyu dekhta??? Poori NCERT padh dali..
@adityarajbasistha377
4 жыл бұрын
exactly..new not ko v not bol raha hai
If you can tune sine wave with band width hypothetically can create sound in theory
plz help Question No. 1 In a network environment, two stations (A and B) are communicating with each other using a wired transmission medium. The information is being carried in the form of digital signal, where each level of the digital signal is converted to its respective binary representation before transmitting. If the digital signal has 12 levels, find out the number of bits that can be used to represent each level of the digital signal. Question No. 2 An XYZcompany is using a high frequency for its transmission lines to supply electric power. If they are using a frequency of 220 Hz for the transmission of electric supply, find out the time period (inmilliseconds) of the given electrical signal. Question No. 3 If a simple sine wave is offset with respect to time Zero by 1/8 cycles;you are required to find out the phase of that sine wave in Radians. Question No. 4 An electronics company has made an oscillator that can generate a sine wave, which changes so rapidly that it’s interval of the wave can’t be determined. What will be the frequency of this sine wave?
@LZYDOG
10 ай бұрын
I only have basic knowledge so these questions are haaard. You think 5years later you could answer You own questions and explain? I think for question 1: to my knowledge signals follow a formula of 2^n= number of levels n= bits per level. So to have a signal utilizing 12 levels it would actually be a 16 level signal like 16MFSK, while not utilizing 4 of the levels. 2^4=16. Each level would be represented by 4 bits. The levels would be gray coded like so: 1: 0000 2: 0001 3: 0011 4: 0010 5: 0110 6: 0111 7: 0101 8: 0100 9: 1100 10: 1101 11: 1111 12: 1110 13: 1010 14: 1011 15: 1001 16: 1000 Would love to know if I'm wrong about that.
Sir, why is it so that "Higher is the harmoin lesser would be its contribution to waveform" ?
hi, thanks for video i need to do it practically .....like adding harmonics to sine wave.....please guide me how to do
Thank you for this video. It was very helpful
So what's band width
very informative. thanks
Ncert se bandwidth topic read kr liya
good video, well explained, thanku
@7activestudio
6 жыл бұрын
Thank you very much Naga Lakshmi for your compliment. 7ActiveStudio Team.
Rf is a sine wave
Very good video boss learnt it
If put it in mathematic formula you need only fraction of data
Really helpful..thnks a lot
speed, measure, similar lambda,
Vino!
Informative
I am Also a Android Developer
this is very helpful, thank you.
Oh Come on please stop cut pasting. please for god shake please stopped. This whole thing is written in Physics Part 2 NCERT page no. 517-518 of Grade/Class/standard = 12th. So please grow up and stop doing this.
@kiranchoudhary9020
5 жыл бұрын
actuallyyyyy
@thetommo4404
5 жыл бұрын
tf is your problem???
Sence
not bad.....................
Good
m/s
I'm useless aren't I
Ncert chhap diya
indian carp