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Looking For A Digital Radio Scanner?
The first step in researching digital radio scanners is to learn the basics. Digital radio scanners are designed to receive and process digitally encoded signals transmitted between various two-way radio systems in public use. The use of digital signals, unlike the recent mandated changeover of television to digital, is voluntary. Both older analog signals and newer digital transmissions are in use. All currently available scanners still receive the analog signals.
You will probably encounter the term "APCO P-25" as you look at digital radio scanners. This is the formal specification for the unencrypted digital format all digital radio scanners support. There are encrypted transmissions that no scanner can process. Since 1994 all scanners have been "Cellular frequency Deleted (Blocked)" by law. This means they cannot intercept cell phone messages and cannot be modified to do so.
Buying, owning and using digital radio scanners is completely legal under federal regulations. There is a clause in the regulations about using a scanner to "break an existing law". Some states and localities have enacted restrictions on using scanners in automobiles or while committing crimes. It is a good idea to check local rules and seek real legal advice about any questions.
There are many publicly available transmissions. Police and fire departments, some ham radio signals, news media vans and helicopters, sports officials, and racing team communications are just a few. Auto racing fans often use digital radio scanners to listen in on team communications.
Taking some time to understand the features will help you avoid paying for things you will never use. The many available brands and models of digital radio scanners offer a wide range of available features and prices. Personal research will pay off with a scanner you will be happy with.
A couple other terms you will encounter are PL and DPL. Some digital radio frequencies are shared by two or more departments. Each department's transmissions begin with a PL tone that specifies the department. Digital radio scanners with the feature can be set to ignore or accept transmissions from specified departments.
The added dangers of online shopping are well known. The retailer you buy from should offer several payment options, have a real physical store address, offer new - not refurbished - products with full USA warranty and not have outrageous hidden shipping charges.
About the Author
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