But since we transmit in x freq, then the receiver must tune to x feq in order to receive the signal right? Why transmit at x freq and receive at y freq?
Or I have misunderstood. Kindly enlighthen.
Thank you,
Jason
[TELECOM Digest Editor's Note: Because both microphones and loudspeakers basically tend to do the same thing. Have you ever plugged a microphone in to a 'speaker jack' or a speaker into a 'microphone jack'? They can do each other's jobs quite well, since, after all, each of them has something inside which tends to 'vibrate' to sound waves. If you ever had a microphone too close to a speaker, or a telephone too close to a radio (during a call in show you were talking on) you hear a squeal, or 'feedback', the noise caused by the sound waves you or someone is producing going around and around. Microphones not only 'hear' the principal sound being given to them, they also 'hear' the amplified sound of the original sound coming back to go around again. Changing the frequencies eliminates a lot of that problem. My explanation is probably not the best, but I hope it gives you the idea. PAT]