Radio equipment such as walkie-talkies is a necessary communication tool for outdoors, but in use, many people do not know how to comply with radio management regulations, and the phenomenon of setting frequencies without knowing the law is serious. The editor collects commonly used frequency tables on the Internet. Please use them according to law. 1.Professional walkie-talkie: Vhf ban...
The police are a profession that uses walkie-talkies particularly frequently. The working environment, usage requirements, and the nature of their communication services are different from other ordinary walkie-talkies. In this issue, let's talk about police radios. Police radio The police radio is a special equipment for the public security system, with a frequency range of 350-370MHz and 370-390...
Due to cost budget and other reasons, many ham(Radio amateur) and riders are entangled in the using walkie talkie or car radio. Is it better to take a handheld radio or a car radio when you will have a road trip ? After reading this article about the comparison between them, you may be able to know. 1.Power and communication distance Walkie talkie: small power, generally within 10W, communication ...
Anyone who is familiar with walkie-talkie knows that it have a function - kill, but for green hands, they may not understand it very well. Today we will talk about the powerful and practical function. The "kill" function of radio can make the radio shut down or prohibit transmission by remote control. The ability to turn off the launch function individually is sometimes referred to as "stun". Afte...
In addition to mobile phones, hams may also want to take a beloved two way radio with them when they travel. So, if it is an outbound travel, can they carry and use the radio? The answer is clear. If there is no relevant permission from the destination country, it is not allowed to use radio equipment casually. For specific usage issues, please refer to the laws and regulations of each country. Fo...
In fact, the attenuation of rain on EMW(electromagnetic waves) below 10 GHz is relatively slight, but for EMW above 10 GHz, the impact of rain attenuation is very obvious. When EMW passes through the rainfall area, the rain not only absorbs the energy of the radio wave, but also scatters it. This absorption and scattering together form electromagnetic wave attenuation. Scattering can also ca...
As we all know, walkie-talkies can make the signal stronger by adding gain antenna. Today we continue to talk about the topic of gain antennas. First of all, we need to understand the function of the gain antenna. Do you know how satellites receive communication signals? Logically speaking, satellites are far away from the earth. The higher the frequency, the greater the loss. So why do satellite ...
Dual standby: Dual band radios generally display two lines up and down, which are generally called the main channel and the secondary channel. When there is no signal coming, the main channel and the secondary channel are in standby mode. When there is a signal coming in, the walkie-talkie will choose the signal that comes first. When there is already a signal coming in, another signal cannot come...