16/10/2023
Some problems encountered when buying intercom opportunities? | S*T
1. Why doesn't the walkie-talkie have a distance parameter?
2. Can different brands of walkie-talkies talk to each other?
3. What is the communication distance of the walkie-talkie?
4. Do I need a license to use walkie-talkies?
5. What is the difference between a digital walkie-talkie and an analog walkie-talkie?
6. What do you think of the safety protection level?
1. Why doesn't the walkie-talkie have a distance parameter?
Although the transmission distance is an important performance index of the walkie-talkie, as an ultra-short wave communication equipment, the transmission distance of the walkie-talkie will be affected by the power of the walkie-talkie, the surrounding obstacles, and the use height.
Power:
Transmission power is the most important basic parameter of the walkie-talkie, the size of the power will directly affect the stability of the signal and the transmission distance, simply put, the greater the power, the farther the communication distance.
The power of civil walkie-talkies is within 0.5W, and after more than 0.5W, it belongs to commercial use, and the use of commercial walkie-talkies requires a license.
Barrier:
Obstacles will affect the transmission distance of walkie-talkie signals, such as buildings, trees, etc., will absorb and hinder the radio waves emitted by walkie-talkies, so the use of walkie-talkies in urban areas will greatly reduce the communication distance
Height:
The use height has a great influence on the radio, and the higher the place used, the farther the signal is transmitted.
2. Can different brands of walkie-talkies talk to each other?
The brand of the walkie-talkie is different, but the principle is the same, as long as the frequency is the same, it can be interconnected.
3. What is the communication distance of the walkie-talkie?
The power of the civil walkie-talkie does not exceed 0.5W, taking 0.5W as an example, the maximum use in open areas can reach 3 kilometers away, and the use of buildings is about 1 km away.
The power of common commercial walkie-talkies on the market is about 5W ~ 10W, 5W walkie-talkies are used in open places, the communication distance is about 5 kilometers, and the building group is used, about 1 ~ 2 kilometers.
4. Do I need a license to use walkie-talkies?
Civil walkie-talkies with a power of less than 0.5W and a frequency of 409-410Hz do not need to apply for relevant certificates.
On the contrary, the use of walkie-talkies exceeding this power and frequency must obtain an amateur radio operating certificate and obtain a radio license
5. What is the difference between a digital walkie-talkie and an analog walkie-talkie?
Digital walkie-talkie is actually an upgraded version of analog walkie-talkie, compared with the traditional analog walkie-talkie, the voice is clearer, the confidentiality is stronger, the ability to transmit data is better, but the price will be higher than the traditional analog walkie-talkie, generally need to keep the communication content confidential, you can choose the digital walkie-talkie. On the contrary, if it is just used normally, the analog walkie-talkie is enough.
6. What do you think of the safety protection level?
Most intercom machines mark their own waterproof and dustproof level, with IPXX (XX as a number) to indicate, the first X represents the dustproof level, the second X represents the waterproof level, such as IP67 represents 6 level dustproof, 7 level waterproof.
