Radio Signal Transmission Question

Not even a "please"?

It goes like this:

The sound waves hit the microphone which converts them into electrical signals, which are amplified and used to modulate a radio frequency carrier which is then further amplified and broadcast out an antenna into the aether where it energizes another antenna connected to a receiver tuned to that frequency which detects, amplifies, down converts and demodulates the signal back into an audio frequency voltage which is amplified and applied to a speaker, or ear buds, which convert the electrical audio signal back into sound waves which then vibrate the innards of the ear of the person listening.

(That's leaving out all the other things that can happen these days, such as microwave relays, satellites, digital encryption, internet travel, etc.)

There. Wasn't that easier than reading your textbook?

hi bhankii, i appreciate you assistance and i would like you to please help and explain broadly the processess involved when the signal enters the mixer,transmitter,transmission antennae,receiver antennae,notch filter, amplifier and finally the transmission antennae to final radio receiver.please iam talking about an FM RADIO STATION.thanks

ya soooooo easy

There are other things that you need to aware of. What kind of modulation do you want FM, AM, SSB, DSB, ISB, or digital to name a few. Will you use DSP for modulation, demodulation, selectivity control, noise elimination, etc.

Buy a good ham radio handbook, read it, and learn something.

wow,

huge project to explain this process

none will well know every details.

This is my job, and it would take me several months to adequately describe the process, as in write a book. The short version is; it is just an electron commute from the studio to transmitter to your home

There are digital and analog transmissions(ie HD Radio, HD TV are digital broadcasts in the states.) In studios there are analog and digital architectures and combinations of both. The method of getting your 'program' from you studio to your transmitter site can vary, there are equalized analog phone loops, microwave transmit and receive (line of sight beam), T1 circuits also are used satellite up and down links can also be used C and Ku band.

If you want to get a big and complete picture, google your parts of the whole learn them individually (ie microphone, mixers/consoles/control surfaces, processors, compellors, limiters, STLs, analog and digital audio, computers, FM/AM/microwave transmitters, studio design, etc) Also a solid understanding of electricity and the associated laws. Google RF transmission, transmitters, RF energy, FM transmitter design, broadcast technologies, antennas, towers, phasors, combiners, RF filters, transmission lines/techniques, VSWR, radiated power, dummy loads, etc. There are safety concerns regarding high voltage/current transmitters so be sure to fully understand the ramifications of working on high voltage/current equipment before you start sticking your hands inside a Rig it could save your life. Even low power rigs can contain very high currents and voltages inside. An undertanding of RF exposure and how frequency affects the human body is necessary if you are going to be in High RF areas(ie transmitter site/farm)

The key to life is not to know everything, but to know where to find it. Thank god for the Internet!! What is the duey decimal system?!?