How many different radio transmissions are there?

Question

I'm doing an assignment for Uni, asking about how many types of ways to transmit radio waves

Answer 1

If you truly mean transmissions: millions a day.

Perhaps you mean frequencies or stations. Rephrase your question for a better answer.

-a guy named duh

Answer 2

If you are referring to TYPES of transmissions, the basic ones are these.

AM , FM , SSB for analogue voice communications.

Everything else comes under the term 'data modes' , in which there are many types again.- but basically it is just data.

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