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Comments on Bandwidth of serial signal

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Bandwidth of serial signal

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Suppose we have this stream of data.Let's assume the data stream lasts 1 sec.

How do we find the bandwidth of the data?Do we Fourier transform the signal in order to find its components in the frequency domain?

Assume now that the bandwidth of the signal is 2kHz.If the bandwidth of the channel isnt 2kHz does this mean the sent signal from the sender will not be read the same from the receiver?

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3 comment threads

That diagram is seriously annoying! (1 comment)
Why does your diagram have time accumulating from right to left. This is very unconventional and I wo... (1 comment)
what's the bit rate? (4 comments)
what's the bit rate?
Pete W‭ wrote over 2 years ago

what's the bit rate?

MissMulan‭ wrote over 2 years ago

Pete W‭ i don't know if it is needed thats why i am asking.I dont have a clue on what "bandwidth of the signal" means here.

Pete W‭ wrote over 2 years ago · edited over 2 years ago

anyway, an analog BW of 2kHz would be totally inadequate for actual bit rates you are likely to find. At least in "typical" serial port uses. Analog BW would typicall mean frequency beyond which the amplitude of a sine sweep test signal comes out attenuated to below -3dB. In frequency units, it needs to be well in excess of the bits-per-second, so that the levels and timing of the edges are reproduced with acceptable margin. The bit rate will be defined by your application, that is usually the starting point.

MissMulan‭ wrote over 2 years ago

Yes the question is theoretical I want to understand what bandwidth of the signal means.