The National Radio Station Management Committee has divided the use of frequencies and stipulated that different industries use the corresponding frequency range. When purchasing, users should apply to the local radio regulatory committee for frequency points.
Public walkie talkie
Refers to a radio with a transmit power not greater than 0.5W and operating at a specified frequency.
Divided into Ni-Cd, Ni-MH batteries and Li-ion batteries, with capacities ranging from 600-2400mAh. Lithium batteries are more expensive and are still under development. Ni-Cd and Ni-MH batteries are more commonly used, and the battery surface and bottom case are ultrasonically welded, which is firm and reliable.
The stronger the transmitter output power, the greater the coverage of the transmitted signal. The higher the receiving sensitivity of the communicator, the longer the communication distance.
This function allows data from one radio to be copied to other radios of the same model.
A channel is a transmission medium through which a signal is transmitted from a transmitting end to a receiving end. In addition to the transmission medium, the channel also includes related equipment for transmitting signals.
A function of walkie talkie. After turning on this function, you can start the transmission by speaking into the microphone on the headset without pressing the PTT button.
A function of walkie talkie. When this function is turned on, the receiver can hear a louder voice even if the transmitter speaks quietly.
It indicates the electromagnetic frequency that can be radiated into space. The frequency range is from 300KHz to 30GHz.
A method of frequency shift keying using a pseudo-random code sequence to make the carrier frequency continuously hop and expand the spectrum, which improves the anti-interference and anti-fading capabilities of the communication system.