Radio beginners often ask questions about CTCSS (Continuous Tone Controlled Squelch System) , thinking that they are vague and difficult to grasp. So today we will talk about what CTCSS is. CTCSS is a technology that adds frequencies lower than the audio frequency (67Hz-254.1Hz) to the audio signal and transmits it together. The purpose is to check whether the signal is legal and whether to respon...
With the development of wireless communication technology, two way radios have become a supporting communication product for more and more hotels, so as to enhance the coordination of the hotel's work and promote the hotel's performance up. So, what kind of radios are suitable for the hotel industry? A stable and efficient internal communication system is a must for a hotel that values quality of ...
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....
Some green hand hams may have questions when they see the “IPXX” logo on the box of two-way-radios, what is the protection level of the radio? The IP(INGRESS PROTECTION) protection rating system is defined by IEC(INTERNATIONAL ELECTROTECHNICAL COMMISSION). It classifies electrical appliances according to their dust and moisture resistance characteristics. The IP rating of a radio or oter device is...
National Day holiday is a good time to travel. While relaxing your mood, we reminds all travel experts, please bring your communication equipment-- walkie-talkie when you go out to travel. Whether it is domestic travel or overseas travel, there are also many travel safety incidents resulting from this, and cases of tour pal who have lost contact and gone abroad frequently occur. During the Nationa...
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...
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...
