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For most mobile phone users, walkie-talkie phone is a remote thing. However, in outdoor activities, walkie-talkie phone plays an more important role than mobile phone since it can communicate freely with teammates in most harsh environments without the support of external base stations. In times of catastrophe, walkie-talkie phone can not only send distress signals, but also listen to outside information. For friends who travel frequently, it is necessary to buy a walkie-talkie phone. Maybe it can save your life in times of crisis.
The English name of walkie-talkie phone is two way radio, which is a two-way mobile communication tool. It can talk without any network support, and there is no telephone charge. It is suitable for relatively fixed and frequent communication occasions.
FM range of walkie-talkie phone
In the daily use of walkie-talkie phone, according to the regulations of China Radio Regulatory Commission, the frequencies of walkie-talkie phone are generally divided as follows:
According to electromagnetic theory, the lower the frequency and the longer the wavelength, the weaker the ability of radio waves to penetrate buildings, but the stronger the diffraction ability; The higher the frequency and the shorter the wavelength, the stronger the ability of radio waves to penetrate buildings, but the weaker the diffraction ability. Therefore, in cities, because of the high density of buildings, strong penetration of radio waves is needed, so the higher the frequency, the more suitable it is; However, when using walkie-talkie phone in open areas such as wilderness or sea surface, radio waves with strong diffraction ability are needed, so V segment (136-174MHZ) is more appropriate.
A listening method used to receive weak signals. By pressing the special key to forcibly connect the receiving signal channel, the operator can identify the weak sound in the speaker with his ears, so as to achieve the purpose of listening.
A listening mode adopted in order to hear calls on all channels. By pressing the special key, the receiving circuit receives the channel one by one in a certain order for a period of time, so as to hear the signals in the channel. If the receiving time of each channel is 100ms, ten channels can be scanned per second, that is, the scanning speed is 10ch/s.
In the scanning process, the set priority channel is preferentially scanned.
Delete or add a channel from or to the scan list.
When this function is activated, the transmission operation can be started directly by voice without pressing PTT key.
This function is used to limit the user's over-time transmission on a channel, and at the same time, it also avoids the interphone from being damaged due to long-time transmission.
In order to save electricity and prolong standby time, the walkie-talkie phone will work in the mode of shutting down and starting up for a period of time without transmitting, receiving and pressing buttons for a period of time, which is called power saving mode. The ratio of on-off time to length is about 1: 4. When the signal is received or there is a key operation, the walkie talkie phone immediately exits the power saving state and enters the normal state.
Shenzhen Phonemax Technology Co., Ltd is one of the leading wholesale oem walkie talkie phone exporter,factory supplier and manufacturer in China, welcome to contact us.
