I’ve read through: [https://en.wikipedia.org/wiki/Frequency_modulation](https://en.wikipedia.org/wiki/Frequency_modulation), to no avail, perhaps I am stuck. Wouldn’t adjusting the frequency through phase and frequency modulation change the frequency of the radio receiving itself?
I understand that radio crystals osciallate at frequency and then we have have amps/transducers. Amplitude modulation makes sense, we turn up this part or that part of the signal. But FM I don’t understand how we can *modulate* without breaking that which allows the radio to receive in the first place. Is it an overtone series? Let’s say I was listening to 91.5 FM, am I also listening to the octave above, so 193 FM?
In: Engineering
Let me put it this way.
If you could only pick up one specific frequency exactly then you’d not get to listen to a fm radio.
The voice of the speaker will essentially increase or decrease the frequency slightly. It’s this change that you can translate into a voice at the reciver.
The advantage is that you get a clearer signal as you transmit with the same amplitude of the signal.
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