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How is AM radio different from FM radio?

On one of my science homework questions it is "Make a sketch to show how FM is different from AM." I have no idea how to do this. All I know is that they are both different radio station things. Can someone please help me and explain to me how to make a sketch of this? Thank you so much for your help!

A.M. is amplitude modualtion, or the wave size changes in height to carry the signal.

F.M. is frequency modulation, or the signal rides on top of the wave.

http://my.integritynet.com/au/purdic/fm-reciever-basics.htm

This entry was posted on Thursday, January 28th, 2010 at 7:32 pm and is filed under fm radio. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

6 Responses to “How is AM radio different from FM radio?”

  1. Ok, so you didn’t read the book/chapter. AM, amplitude modulated. FM, frequency modulated. The radio waves ride differently. Read the damn assignment then maybe you will understand better. I/we can’t do everything for you.
    References :

  2. Sarah,

    Here’s an easy explanation. There are others available, you just have to search.

    -a guy named duh
    References :
    http://en.wikipedia.org/wiki/RIAA_equalization

  3. A.M. is amplitude modualtion, or the wave size changes in height to carry the signal.

    F.M. is frequency modulation, or the signal rides on top of the wave.

    http://my.integritynet.com/au/purdic/fm-reciever-basics.htm
    References :
    Classes on how radio work and the web.

  4. fm has music and am is stacky
    References :

  5. Stretch a slinky out a bit pull on it and send a longitudinal wave down it. That’s what a modulated FM wave looks like pretty much. The compressions and decompressions is how a signal is sent. These are actually frequency fluxuations called deviation.
    References :
    Amateur radio operator

  6. there is a LOT of difference!!!

    If you are talking about AM or FM BROADCAST, then here are the differences….

    AM is very low frequency
    FM is VHF Very High Frequency

    AM has a very limited audio bandwidth – poor tonal quality 6kHz maximum
    FM has a very wide audio bandwidth – better sounding audio 18-20Khz

    AM is subject to band fade and frquency shift
    FM is solid because of circuitry inside the receiver – automatic gain control

    AM is monoband – yes, there was experimention with stereo FAIL!
    FM is stereo

    AM requires a very long antenna
    FM requires a short antenna

    AM must change output power and antenna direction at sunset and sunrise except for clear channel broadcasters
    FM is local to a given market

    AM is subject to noise
    FM is "noise free"

    AM is NOT limited to 540 to 1700 kHz (standard broadcast), AM is also used by aircraft, CB radio and ham radio.
    References :

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