Mono, MPX, Stereo, Compression, Limiting, Processor, RDS. Which one do I use? Which one do I need?

By Yoneli J
https://aareff.com/yoneli-jimenez.htm

FM Transmitter Mono/MPX Version.

1wpllb-aareff-back

Stations with more engineering experience may use this version, this is because it does not include limiting or stereo coder circuitry. The audio limiting for this version must be externally provided and in accordance with the recommendations of http://www.aareff.com/ETR132.pdf. This version is typically used with external multi band processors, stereo generators and RDS generators such as the brands Orban or Inovonics. Not recommended for novice stations or beginners.

FM Transmitter Stereo Version.

This is similar to the Mono/MPX version except it is stereo and RDS cannot be used with this. Again stations with more engineering experience may use this version, this is because it does not include audio limiting. Again the audio limiting for this version must be externally provided and in accordance with the recommendations of http://www.aareff.com/ETR132.pdf. This version is typically used with external multi band processors and stereo generators such as the brands Orban or Inovonics. Not recommended for novice stations or beginners.

FM Transmitter Stereo Version with Audio Compression and Limiting.

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Most small radio stations and beginners will use this version, this is because it includes audio processing circuitry and suitable limiting to keep the transmitter in compliance with the maximum bandwidth permitted by the international regulations. There is also access to the MPX in and out on the back panel which allows all known RDS units to be connected. Novice stations with limited experience of FM broadcasting transmitters should purchase this version.

https://www.aareff.com/en/250w-erp-fm-transmitter-system.htm

By Michael Campos
https://aareff.com/michael-campos.htm

Community radio also known as LPFM in the USA which stands for LOW POWER FM was created to provide a non expensive method for non profit groups to get on the air operating anywhere from 1w – 100w. This attempts to bring humanity together, induce creativity in individuals and transform communities by having their own people RUN and PRODUCE their own programs. This gives sufficient time to elaborate programs which bring interest to the community. One of the reasons for this sufficient time is that generally community radios are legally PROHIBITED or RESTRICTED to play any sort of advertisements opposed to commercial radio.

To the best of our knowledge the first known community radio was introduced in 1940 in Bolivia during a labor strike, since then it’s become an essential tool for communities to fulfilling the urge, the desire for communication and self expression.

Community Radio in some countries is not protected from interference that may be received, unlike commercial radio. Also it’s sponsored by individuals and business that believe in the concept of giving a voice to the rarely heard while giving us the freedom of speech thought and expression.

On the other hand commercial radio is based on business on the practice of airing radio advertisements for profit. Commercial radios mostly owned by private corporates and are known for playing high quantities of copyright music with a high ratio of advertisements cutting short the time for community programs and local issues.

Things You Didn’t Know About Commercial Radio

1.In most stations DJ’s don’t pick the music, the management do this.
2.Your production must be very professional or it won’t be played.
3.Buying advertisements and trading publications is not required but helpful.
4.It’s not about if your music is good or not, it’s about ratings.

In conclusion, community radio was created to give people of the community an opportunity to express themselves in a with truth and honesty in way that cannot be done with commercial radio.