FM and AM!!!!!
@musicloverfriend (1465)
India
May 5, 2012 10:12am CST
Hello friends,I have heard about this two new concepts lately.But i didn't understand these terms.I know that FM is frequency modulation and AM is Amplitude Modulation.But this is only the full form.I don't know what exactly that is??Can you give me more information??
1 person likes this
4 responses
@musicloverfriend (1465)
• India
6 May 12
What are the advantages and disadvantages of AM and FM??
Which is better???
And why did they Shift AM to FM??
@coolnithinkrrr (72)
• India
6 May 12
I think am wave is used for long range transmission and the other for short range transmission of a signal.
am is is received at a receiver which is far and then then converted into fm to nearby receiver.
1 person likes this
@peavey (16936)
• United States
6 May 12
The US government took over AM air waves during the Second World War and in 1986, they quit granting licenses for high wattage AM stations. Most the AM stations that you hear now were in operation before then.
FM is actually a better signal, since it uses a wave frequency according to the need of what's being broadcast. There's less static and other interference.
I think that's right. Perhaps someone else can clarify it for you.
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@coolnithinkrrr (72)
• India
6 May 12
To know that first you must know what modulation is.It is changing of some parameters of a signal(electrical signal mostly).We change frequency,amplitude or phase o a signal.
Changing frequency keeping other parameters constant is called frequency modulation.Similarly changing amplitude keeping others constant is called amplitude modulation.
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@musicloverfriend (1465)
• India
7 May 12
Which is better??Is AM being used now?I have heard that In AM sound quality is not up to the mark.But FM Has great sound quality.How do People change the frequency and amplitude of a wave??
@dollar3235 (2062)
• India
13 Dec 12
Hi musicloverfriend,
These two are basically signal transmission techniques, the original wave can be shown like this:
http://outreach.phas.ubc.ca/phys420/p420_05/anthony/Parts%20of%20a%20wave_files/image002.jpg
FM: Carrying of information over an electromagnetic wave by varying its frequency.
AM: Carrying of information over an electromagnetic wave by varying its Amplitude.
This link has a photo that shows AM and FM diagrammatically:
http://en.wikipedia.org/wiki/Frequency_modulation
Here you can find the difference between FM and AM:
http://www.differencebetween.net/technology/the-difference-between-am-and-fm/
