Antenna is a relatively common device, widely used in radio, television, radio communications, radar, navigation, electronic countermeasures, remote sensing, radio astronomy and other fields. Antenna is a device that can effectively radiate electromagnetic waves to a specific direction in space or can effectively receive electromagnetic waves from a specific direction in space. All the equipment t...
People who have just started to get in touch with radio will definitely be puzzled: Why is there a brief rustling sound on the walkie-talkie after the other one finishes speaking? This starts with the noise of the walkie-talkie. When the walkie-talkie is transceiving, it will not only receive useful sound modulation signals, but also receive white noise in the air, as well as noise generated by th...
First of all,make it clear that we can carry walkie-talkies on a plane. However, when we go through airport security, we need to cooperate with the security officer by switching off the walkie-talkie and removing the battery from the radio and carrying it separately from the main unit. It is also important to note that the walkie-talkie cannot be switched on and used on the aircraft. The aviation ...
With the vigorous development of maritime industry, the importance of marine radio communication has also been paid more and more attention. Some people may have less exposure to this area, but to give you a few examples, such as the rescue of the Titanic, the rescue of the Jiang Yalun, etc., marine radio communication has played a crucial role. Today we are going to talk about this topic. 1....
Like mobile phones, radio communication belongs to wireless communication. As we all know, mobile phones have certain radiation, so walkie-talkies also have certain radiation during use. However, since the call of the walkie-talkie is intermittent, and the high power is only generated when it is transmitted. Therefore, compared with the mobile phone, the radiation of the walkie-talkie is sma...
With the development of real estate, the property industry is also growing day by day. Walkie-talkies are an essential communication tool for internal management of the property industry. The quality and stability of radios are related to the overall management level and service quality of property companies. Choosing a suitable walkie-talkie to build a wireless communication system is indispensab...
With the development of the economy, the people's requirements for long range communication have increased, and DMR radios have gradually begun to be used in public fields such as taxi dispatching, security, property management services, construction sites, hotels and restaurants. So how many kilometers can the longest call distance of a DMR radio reach? In an ideal situation (without any obstruct...
With the widespread use of walkie-talkies, the issue of frequency compatibility between different brands of radios has gradually received attention. Frequency compatibility refers to the ability of two or more walkie-talkies to communicate by setting the same frequency and parameters. Different brands of walkie-talkies can achieve frequency compatibility through manual setting of frequency, automa...
