transmitter

Discussion in 'General Electronics Chat' started by joni, Nov 24, 2009.

  1. joni

    Thread Starter Member

    Oct 4, 2009
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    transmitter
     
    Last edited: Nov 25, 2009
  2. bertus

    Administrator

    Apr 5, 2008
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  3. joni

    Thread Starter Member

    Oct 4, 2009
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    I read your article site
    But it is difficult to me to understand it
    Can you write me in shortly an in easy way what it mean
     
  4. KL7AJ

    AAC Fanatic!

    Nov 4, 2008
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    287

    FM stereo uses a form of time-share multiplexing. It first samples the left channel for 1/38,000 second, then the right channel for 1/38,000 of a second. A standard FM reciever with no stereo decoder will receive both channels and ignore any stereo information. The original reason for using this method, in fact, was to make it "listenable" on monaural receivers.

    In order for a stereo receiver to "sort out" the left and right slices, a pilot signal, at exactly half the switching frequency (19KHz) is inserted in the signal. The receiver locks onto this pilot signal which then is used to synchronize the demultiplexer in the receiver...sending all the altenate left slices to the left channel and the alternate right slices to the right channel.


    Hope this helps. :)

    eric
     
  5. joni

    Thread Starter Member

    Oct 4, 2009
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    0
    Thank KL7AJ
    Your answer helps me a lot
    But I need more help
    Yet I don't understand all this problem
     
  6. Audioguru

    New Member

    Dec 20, 2007
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    In Google, enter FM Stereo Theory.
     
  7. joni

    Thread Starter Member

    Oct 4, 2009
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    Thanks audioguru
    Of course I used and will use google
    But I yet don't understand it
    beacause of this I ask for help in this forum
     
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