The talk distance of the walkie-talkie in a flat, open and barrier-free environment can reach up to 6 kilometers, but because the transmission of radio waves will be affected by obstacles; similarly, some external factors often weaken the call signal, and the call range also changes. When there is network support, the talk distance of the walkie-talkie can reach tens of kilometers.
The factors that affect the walkie-talkie:
- System parameters. The stronger the output power of the transmitter, the larger the coverage of the transmitted signal and the longer the communication distance. However, the transmission power should not be too large. If the transmission power is too large, it will not only consume power and affect the life of the power amplifier components, but also have strong interference, affect the call effect of others, and also cause radiation pollution. The radio regulatory agencies of various countries have clear regulations on the transmission power of communication equipment. The higher the receiving sensitivity of the communicator, the longer the communication distance.
- Environmental factors mainly include paths, density of trees, environmental electromagnetic interference, buildings, weather conditions and terrain differences. These factors and other parameters directly affect the field strength and coverage of the signal.
- The battery power is low. When the battery power is low, the call quality will deteriorate. In severe cases, there will be noise, which affects normal calls.
- The factors that affect the distance and effect of the intercom are also related to the season, and summer is better than winter.
- Generally, the longest distance of direct frequency use in the city will not exceed 5 kilometers. The advantage is that it is convenient to contact, but the disadvantage is that the signal is seriously interfered, the voice quality cannot be guaranteed, and the communication distance is shorter when the relay station is not connected. Although other shortwave mobile stations have great advantages in communication distance (generally, radio enthusiasts in Hong Kong, Taiwan and Japan mostly use shortwave mobile stations to communicate, with a power of 3-4 watts, but they can basically communicate with each other easily under good weather conditions) However, due to the particularity of shortwave signals, it is difficult to communicate directly in cities.
- Hand-held walkie-talkie: 7W transmission power: 2-4 kilometers in urban area, 4-7 kilometers in open area; 5W/4W transmission power: 1-3 kilometers in urban area, 3-5 kilometers in open area; 3W/2 Watt transmit power: 500m-2km in urban area, 1-3km in open area; 1W/0.5W transmit power: 200m-800m in urban area/500m-1.5 km in open area.
- Vehicle-mounted walkie-talkie: 50W/40W Transmitting power: 5-15 kilometers in urban area, 10-25 kilometers in open area; 25W/20W Transmitting power: 3-10 kilometers in urban area, 5-15 km in open area; 10 Watt / 5 Watt transmitting power: 1-5 kilometers in urban area and 3-8 kilometers in open area.
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