am review

AM Review

Review Questions. . .

It Consist of:

1. TALK ROOM 2. PLAY BACK ROOM3. MUSIC ROOM4. DUBBING ROOM5. RECORDING ROOM 6. A.M/F.M STUDIO 7. CONTROL ROOM

Mast radiator monopole antenna used for AM broadcasting.

A monopole antenna is a class of radio antenna consisting of a straight rod-shaped conductor, often mounted perpendicularly over some type of conductive surface, called a ground plane. The driving signal from the transmitter is applied, or for receiving antennas the output voltage is taken, between the lower end of the monopole and the ground plane. One side of the antenna feedline is attached to the lower end of the monopole, and the other side is attached to the ground plane, which is often the Earth. This contrasts with a dipole antenna which consists of two identical rod conductors, with the signal from the transmitter applied between the two halves of the antenna. Common types of monopole antenna are the whip, rubber ducky, helical, random wire, mast radiator, and ground plane antennas.

Today's typical broadcast studio at a Radio station consists of a console, microphones, computers, CD players.

Radio Station Studio Audio Console

This is where all the sound sources are mixed before being sent to the transmitter. Each slider, sometimes known as a "pot" on older boards, controls the volume of one sound source: microphone, CD player, digital recorder, network feed, etc. Each slider channel has an on/off switch at the bottom and various switches at the top which can divert to more than one destination.

A VU meter, such as the square box-like area toward the top of the console with the two green horizontal lines (center top), shows the operator the level of sound output. The top horizontal line is the left channel and the bottom line is the right channel.The audio console converts analog audio (voice via microphone) and phone calls to a digital output. It also allows for the mixing of digital audio from CDs, computers, and other digital sources with the analog audio.In the case of Internet radio, the audio output would be uploaded to a server which then distributes the audio - or streams it - to listeners.

http://radio.about.com/library/bldef-102.htm

Radio Station Microphone

Most radio stations have an assortment of microphones. Some microphones are especially designed for voice and on-air work. Often, these microphones will also have wind-screens over them, as this one does. The wind-screen keeps extraneous noise to a minimum such as the sound of breath blowing into the microphone or the sound of a "popping" "P". (Popping Ps occur when a person pronounces a word with a hard "P" in it and in the process, expels a pocket of air that hits the microphone creating undesired noise.)

Radio Station Microphone

This is another example of a high-end professional microphone. Most mikes of this caliber easily cost hundreds of dollars.

This microphone does not have an external windscreen. It is also on an adjustable mike stand and in this case is usually used for studio guests.

Radio Station Software

Radio Station Software

Most radio stations have entered the digital age where not only is all the music, commercials, and other sound elements stored digitally on hard drives, but sophisticated software is also used to either automatically run the station when a human can't be there or to help in assisting a live DJ or personality in running the station. There are various types of software designed to do this and it usually displays directly in front of the audio console where it clearly seen by the person on-air.This screen is displaying each element that has played and will play over the next 20 minutes or so. It is a digital version of the station's log.

Radio Station Headphone

Radio Station HeadphoneRadio personalities and deejays wear headphones to avoid feedback. When a microphone is turned on in a radio studio, the monitors (speakers) automatically mute.

This way, the sound from the monitors won't re-enter the microphone, causing a feedback loop. If you've ever heard someone talking on a P.A. system at an event when it feedback, you know how annoying that noise can be.

So, when the monitors are muted because somebody turns on the microphone, the only way to monitor the broadcast is by using headphones to hear what's going on. As you can see, these are pretty weathered. But, then again professional headphones cost more and last longer.

Radio Station Soundproofing

In order to keep the sound of radio personality's voice sounding as good as possible, it's important to soundproof a radio studio.

Radio Station Booth

Radio Station Transmitter

BC-250L AM Broadcast Transmitter


fmuser02 50KW AM/FM Radio Station Broadcast transmitter

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