Frequencies carry information??

Question

Does waves carries anything?? For example, Walkie Talkie works on a specific frequency, so wavelength and Hz and amplitude is the same. So does wave carry information or how walkie talkie carry information through one same wave frequency?

Answer 1

There are two waves to consider here. The carrier wave, which is the constant frequency that is reported on a walkie talkie (like 49MHz for example) or a radio station dial (like 105.3MHz). Then there is the wave which carries the information. Getting this other wave onto the carrier wave is done by one of two methods, Amplitude Modulation (AM) or Frequency Modulation (FM). Amplitude Modulation takes the wave carrying the information (such as your voice) and adds it to the carrier wave by summing their amplitudes.
Walkie Talkies typically use AM.

FM is a little more complicated. It takes the amplitude of the information signal and uses that to vary the frequency of the carrier wave.

Answer 2

Well, no, wavelength and frequency (Hz) and "Amplitude" are not the same thing.

Wavelength and Frequency are kind of the same thing, They are just different ways to measure the same thing.
Wavelength refers to the distance between identical peaks of a sine wave. Frequency is a count of how many of those peaks occur in a second.

Amplitude is the height of a waveform above zero and can be measured in micro increments, mille increments, or in whole number increments.

If you took a walkie talkie and pushed the transmit button, but said nothing and did only that (pushed the button, assuming it was turned on), the walkie talkie radio would transmit a signal on a frequency (determined by a crystal inside the set, or some synthesizer equivalent circuit).
No data would be sent, only a long continuous wave.

If you wish to send data over that frequency, you must alter the wave methodically in some fashion to place your data information upon it. One way to do that would be to key the mike button in a pattern which is shown in charts of the Morse Code. Three short pushes of the button then could represent an "S" . Three longs , an "O". Etc.etc.

Or, if you were to speak into the microphone, circuitry in the radio would amplify that voice waveform and manipulate the signal put out by the walkie talkie in some fashion, thus transmitting your voice data. FM walkie talkies transmit voice information by varying the frequency of the transmitted signal over a bandwidth of about 8 kilohertz. AM walkie talkies add the power of the mike audio to the transmitted waveform via amplitude modulation to produce sidebands containing the information about 6 khz wide above and below the transmitted frequency. Some units digitize the audio and send it in a pulse modulated keying of the transmitted wave. There are other methods of doing it also.

The trick is to do the process on the sending end, and reverse the process on the receiving end so that your partner gets the audio or data that you are trying to send to him/her. So one set has a modulator and one has a de-modulator, or one has a sideband transmitter and one has a sideband receiver, ditto: FM transmitter, FM receiver. You are almost there now... In ideal conditions, each of you would have both modulators and de-modulators in your equipment so you could both send and receive. Bingo, walkie talkies... or communications sets.

Hope that helped.
Zah

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Amplitude is something entirely different.