- #1
Niko Bellic
- 10
- 0
Why modulate the "data" sinusoid onto a "transmitter" sinusoid?
(Sorry about the simple question but this stuff isn't exactly my specialty)
From howstuffworks.com ...
Why can't you just send the sine wave produced by a person's voice directly through the air (or whatever channel you are using) instead of encoding the voice onto transmitter sinusoid? I am guessing it is because the sinusoid of a higher frequency can travel farther without attenuation. If so, why is this?
Also, unrelated...
What exactly is "static" and why is FM immune to it?
Thanks!
(Sorry about the simple question but this stuff isn't exactly my specialty)
From howstuffworks.com ...
In amplitude modulation, the amplitude of the sine wave (its peak-to-peak voltage) changes. So, for example, the sine wave produced by a person's voice is overlaid onto the transmitter's sine wave to vary its amplitude.
Why can't you just send the sine wave produced by a person's voice directly through the air (or whatever channel you are using) instead of encoding the voice onto transmitter sinusoid? I am guessing it is because the sinusoid of a higher frequency can travel farther without attenuation. If so, why is this?
Also, unrelated...
The advantage to FM is that it is largely immune to static.
What exactly is "static" and why is FM immune to it?
Thanks!