What is the difference between digital walkie-talkie &analog walkie-talkie?

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Digital intercom is widely used in the military, public security personnel, security protection, emergency rescue, public utilities and other government agencies, along with the development of the economy, the people’s demand for mobile communications, digital intercom gradually began to be used in taxi dispatching, security, property management services, construction sites, hotels and restaurants and other civilian-type occasions. So how many kilometers can the farthest call distance of the digital intercom reach?
In the wireless communication technology, usually do not say “spacing” this basic concept, because the ultra-short wave communication is a line-of-sight transmission mode, the data signal is affected by buildings, hilly terrain and trees, electromagnetic waves and other blocking and impact, affecting the fact that the call spacing and quality, so all the consideration is the ultra-short wave call quality.

In the ideal situation (without any obstruction and influence) the technical professional digital intercom call spacing will be very far, while the fact that the call spacing is usually only in the middle of 0 ~ 10 km, in the case of high and large housing buildings or high mountain obstruction, the call spacing will still be relatively short. When there is a system software base station (relay) support, the digital intercom call spacing can reach more than ten kilometers or even dozens of kilometers.

Most of the digital intercoms sold on the market, the manufacturer claims that the highest call spacing of digital intercoms is 5 to 10 km, in fact, the highest call spacing is only a basic theoretical measurement data information, that is, the highest call spacing of digital intercoms in the absence of any obstruction, without any interference signal condition.

When you have sufficient relative height, you will find that your digital intercom calls may not be as far as measured. Even in an idealized situation without obstructions, the data signal output power drops to a quarter, or 6dB loss, for each additional double spacing.

This is because the earth is not an idealized solid model, and the data signal from a digital intercom must resist obstructions. Flowers, trees, buildings and countless other objects block the wireless communication data signal of the walkie-talkie. In undulating terrain, low-lying areas of the terrain are bound to drop your wireless communication data signal. Large cities in the natural environment of multi-story buildings like the walls of the Grand Canyon, will seriously weaken the data signal, metal fences will also drop the strength of the data signal. Of course, even a leaf will stop your data signal by just a fraction.

By comparison, the average digital walkie-talkie only has a frequency ranging between 100 and 400 megahertz. We know that the lower the frequency, the wider its area of propagation. These digital walkie-talkies, which have a data signal frequency that is very different from that of a cell phone.

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