Urban environments are filled with kilowatts of radio waves from commercial and government transmitters. Although you can’t make anywhere near enough electricity from this energy source to run your house, you can detect it with sensitive electronic equipment. All antennas create electric currents from radio waves; they produce small amounts of energy. Radio Wave Energy…
Whether using wireless networks, watching television or listening to the radio, your data connectivity relies on antennas. Reducing interference, proper alignment and mounting location are among the common issues you face with any antenna installation. Different types of antennas present different concerns, so you need to take different steps to address the specific needs of…
Satellites orbiting the Earth communicate with stations on the ground using radio waves. The only difference between the radio waves picked up by the satellite radio on your office desk and those used for traditional FM and AM broadcasts is the wavelength and frequency. The U.S. government allocates specific frequencies for commercial, scientific and military…
A scanner radio might not be the most commonly seen piece of equipment around the home or office, but scanner radios do provide genuine value, whether for hobby or work. Whatever your use will be, you’ll need to learn about some of the legalities of using a scanner radio. You’ll also benefit from knowing how…
This article is the the second part of RT24 programming, RT24 has some special functions together, like change password, scramble and compander, which makes it unique.
Analog two-way radios have helped keep warehouse personnel connected for decades. The question on a lot of facility managers’ minds these days is whether they need to upgrade their radios to digital technology.
Before you decide to buy a two-way radio , it’s important to have a good idea of the features available and what they can do for you. The best business-class radios have features to keep your people safe, provide conveniences to make your operation more efficient, and keep your communications private and secure. Here’s a…
FM reception specifications including the FM capture ratio and its associated capture effect, along with the FM quieting figures and facilities including squelch are of great importance to users of FM systems. Frequency modulation, FM is widely used in radio communications and broadcasting, particularly on frequencies above 30 MHz. It offers many advantages, particularly in…
People in the use of wireless walkie-talkie often hear the background noise, squelch, refers to the radio in order to solve the call quality and noise problems, and design of the squelch circuit or squelch function. Squelch function has a different squelch level, according to the actual situation to adjust themselves. Noise characteristics Wireless walkie-talkie…
Standing-wave ratio (SWR) is a mathematical expression of the non-uniformity of an electromagnetic field (EM field) on a transmission line such as coaxial cable. Usually, SWR is defined as the ratio of the maximum radio-frequency (RF) voltage to the minimum RF voltage along the line. This is also known as the voltage standing-wave ratio (VSWR).…