What’s stopping another person/company from transmitting on the same radio frequency as an established radio channel?
In: Technology
Usually practicality, both in owning the power amplification equipment and in erecting an antenna viable for such transmission. The power that regional FM stations use is very well into the thousands of watts so creating something to overpower such a device without being FAR closer to the latter source is unlikely. For convenience sake you can think of the barrier to transmission on an established frequency as a yelling match between you and the operators of these radio stations, only you’re restricted to a whisper and they can scream like banshees.
If someone gets past practicality then as others have said the FCC (or whatever spectrum regulating entity there is for a country, and I’m fairly certain all countries have one) stops them. Definitely look into a spectrum chart from the FCC sometime, it’s full to the brim with allocations to various entities and organizations.
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