In the major of wireless communication, there is no technical parameter of "distance", because radio transmits signals by electromagnetic waves, and there are many factors that can affect the distance of wireless signal propagation. The internal influencing factors include the transmission power of the device, receiving sensitivity, and antenna gain. And altitude, external factors include the use of the environment, air interference radio waves and so on.
Although the communication distance of the walkie-talkie is difficult to say clearly, everyone is still very concerned about this issue. Huizhou Beijia Electronic Technology is a professional manufacturer of radio walkie-talkies. Based on years of customer feedback and our own test experience, we have come up with a rough walkie-talkie Effective distance range, for your reference:
1. Handheld walkie-talkie
7 W transmission power: 2-4 kilometres in the urban areas, 4-7 kilometres in the open areas
5W/4W transmit power: 1-3km in the urban area, 3-5km in the open area
3W/2W transmission power: 500m-2km in the urban area, 1-3km in the open area
1W/0.5W Transmitting power: 200m-800m in the urban area/500m-1.5km in the open area
2. Car walkie-talkie
50W/40W transmission power: 5-15 kilometres in the urban areas, 10-25 kilometres in the open areas
25W/20W transmission power: 3-10 kilometres in the urban areas, 5-15 kilometres in the open areas
10W/5W transmission power: 1-5km in the urban area, 3-8km in the open area
3. Short wave walkie-talkie
The distance is very far, and with the support of external environmental factors, it can communicate across provinces or even across borders, but the short-wave walkie-talkie requires an amateur radio operation certificate of level 3 or above, otherwise it will be considered illegal.
4. Cluster walkie-talkie
The distance is very far, and it can communicate in the whole city. It is generally used in the public security network and requires high cluster networking costs.
5. Install the repeater
The cost of the repeater is relatively high, but the effective communication distance can be greatly increased by the handheld walkie-talkie and the vehicle-mounted walkie-talkie through the repeater.
Precautions for walkie-talkie operation:
1. When the walkie-talkie is transmitting, keep the walkie-talkie in a vertical position, and keep the distance between the microphone and the mouth 2.5-5 cm. When transmitting, the walkie-talkie is at least 2.5 cm away from the head or body
2. Do not turn on and off multiple times during use, and at the same time adjust the volume to a volume suitable for your hearing
Safety precautions for using the walkie-talkie:
1. On a car with an airbag, do not place the walkie-talkie within the range that may be involved when the airbag is deployed. If the walkie-talkie is in the area that may be involved when the airbag is deployed, once the airbag is deployed rapidly, the walkie-talkie may injure the occupants of the vehicle with the great impact
2. In potentially explosive atmospheres or occasions, unless the walkie-talkie is a specially certified explosion-proof walkie-talkie, the walkie-talkie must be turned off.
In potentially explosive atmospheres, electrical sparks can cause explosions or fires.
3. Do not replace or charge the battery in a potentially explosive atmosphere. Installing and removing batteries may cause contact sparks and cause an explosion.
4. Before approaching the blasting area and the area where the detonator is located, the walkie-talkie must be turned off to avoid possible explosions
Intercom Routine Maintenance
1. After long-term use of the walkie-talkie, the keys, control knobs and casing are easily dirty. Please remove the control knob from the walkie-talkie and clean the casing with a neutral detergent (do not use strong corrosive chemicals) and a damp cloth. The use of chemicals such as stain removers, alcohol, sprays or petroleum preparations may cause damage to the surface and case of the radio.
2. Handle the walkie-talkie with care, and never move the walkie-talkie with the antenna.