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AM electromagnetic waves: 20 KHz modulation frequency on anastronomically-low carrier frequency
On 6/30/07 7:31 PM, in article , "John Smith I"
wrote: Radium wrote: ... If a carrier signal varies by anything other than just amplitude, then it isn't AM. Right? Let logic be your guide, again. As was pointed out earlier, the voice freqs which modulate the carrier will cause a variance in freq (a small fm component.) This will not happen in a properly designed transmitter. It is not a characteristic of AM. In fm, it is not unusual for a small "amplitude modulation" to be generated, as the varying/spanning of freq(s) is caused by the modulation, some changes in fm carrier can be generated. In an imperfect world, nothing is "perfect." Regards, JS |
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