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Digital over analog

Dear experts.

Do you know what is the benefits of using digital over analog? I know the major advantage of digital data transmission over analog is that digital signals can be transmitted over long or short distances without picking up noise. What advantages I can get for using digital over analog?
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drmopco
Asked:
drmopco
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4 Solutions
 
Rick HobbsRETIREDCommented:
Compared to what? Analog over analog?  You have already answered your question if that is the case.
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Erik BjersPrincipal Systems AdministratorCommented:
Digital can give you greater speeds and greater distance.  (I'm assuming you are talking about fiber over ethernet)

Disadvantage would be cost.
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Sam PanwarSr. Server AdministratorCommented:
Hi,

Digital signals consist of patterns of bits of information. These patterns can be generated in many ways, each producing a specific code. Modern digital computers store and process all kinds of information as binary patterns. All the pictures, text. sound and video stored in this computer are held and manipulated as patterns of binary values.

The main advantage of digital signals over analog signals is that the precise signal level of the digital signal is not vital. This means that digital signals are fairly immune to the imperfections of real electronic systems which tend to spoil analog signals. As a result, digital CD's are much more robust than analog LP's.

Digital signal processing
http://en.wikipedia.org/wiki/Digital_signal_processing
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The--CaptainCommented:
This sounds suspiciously like homework, but you have been a member for some time and don't seem to have a habit of such, so I'll back off...  Still, can you be more specific about your context here?  There are so many potential angles to your question...

Sometimes digital is better, sometimes analog is better - please be more clear.

Cheers,
-Jon

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ded9Commented:
Speed is the advantage

Reps
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drmopcoAuthor Commented:
Let me clear my question.  I want to get some information that what are the advantages when I use digital over amplitude modulated phone system in business. I know digital signals can also be transmitted over an analog carrier wave but the data they carry is not base upon the max amplitude of the wave. Digital signals are in one of two state either on or off and it is easy to determine this state even if the signal has picked up a large amount of noise or lost signal. Am I hitting the right target?
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Rick HobbsRETIREDCommented:
Yes, that is correct.  Noise is much less of a problem on digital signals compared to analog signals.
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drmopcoAuthor Commented:
Well, this is not a homework anyway. I think that I understand little bit about digital over analog.
Thanks.
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Erik BjersPrincipal Systems AdministratorCommented:
Glad we could help.

eb
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Rick HobbsRETIREDCommented:
You are welcome.  Anytime.
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