Intercom scanning: a way to monitor the communication channels adopted by all parties. By pressing the dedicated key, the receiving circuit receives a channel in a certain order for a period of time to receive channel signals.
Monitor: Accept weak signal shooting in monitor mode. The operation of determining the sound of the earphone speaker and the receiving signal path of the listening purpose by pressing a special key force.
Priority channel scanning function (priority channel scanning): during scanning, set the channel setting of scanning priority.
Delete/Add Scan Channel (Delete/Add Scan Channel): The channel will be deleted from or added to the scan list.
Voice (VOX): After this function is activated, the launch function can be started directly by voice without pressing PTT key.
TOT (Timeout Timer): This function is used to restrict users from starting a channel within a certain period of time, and at the same time, it also avoids the damage caused by the long-time start of the intercom.
Butter saving function: In order to save electricity and extend its standby time, the walkie-talkie will not send for a while, and the reception and key operation will be turned off for a while. At one time, its mode was called power saving mode.
Low power selection function (high/low power): This function allows the user to select high power or low power according to the actual situation.
Embargo function (busy channel lock): When using this function, users are prohibited from sending signals from busy channels.
Quiet level: The signal strength of the received signal and noise is that the stronger the relationship between the files, the weaker the signal noise, and the noise between the maximum noise and the minimum noise is divided into several files, which is called integration and also divided into several files of the so-called silent series. Users can choose according to the actual situation.
CTCSS/CDCSS function: this function can prevent receiving irrelevant calls.
Dual-tone/dual-tone multi-frequency selective calling function: use dual-tone or dual-tone multi-frequency signals to select the appropriate internal phone.
Scrambling function (anti-frequency): When scrambling function is used, the transmitting and receiving frequency walkie-talkies will be interchanged and in the same group of signaling.
Offline function (off-network): When using off-network function, the transmitting frequency and receiving frequency of interphone are the same; The signaling of the transmitter and the receiver can become the same signaling.
Automatic transponder: When the intercom receives a correctly coded call, it will send a signal to the caller to respond to the call.
Emergency alarm: Press the special alarm key, and the intercom will give an alarm or send a pre-alarm code to other loudest mobile phones.
Key lock function: This function can be used to prevent key misoperation.
Copy function: This function allows you to copy data to clone of the same walkie-talkies of other models.
Modulation: Use one or several modulated carrier signals to control the changing parameters. According to different control parameters, it can be divided into amplitude modulation, phase modulation and frequency modulation.
Audio: refers to the human voice frequency of 300HZ-3400HZ, usually refers to the band.
Carrier: voice digital signal, the carrier of the signal, until it is convenient to transmit useful signals of high-frequency electromagnetic waves. When the parameters of one or more adjustment signals change, the control parameters of carrier modulation are divided into amplitude modulation, phase modulation and frequency modulation according to the different control parameters.
Channel and channel spacing; Channel occupancy refers to the time when values are frequently sent and received. Frequent adjacent rate differences between channels are called channel intervals.
CTCSS: In the continuous voice squelch control system, the known audio and sound will be lower than the frequency (67HZ-250.3HZ) connected with the audio signal transmission technology. Because the known audio standard is lower than the accuracy in the frequency range of audio. When the signal received by the internal intermediate frequency filter demodulator is output to the audio signal, it is input to the CPU after shaping, and compared with the CTCSS frequency set by the computer to decide whether to turn on the mute.
DTMF: Dual tone multi-frequency, high frequency and low frequency group. Each group of four high-frequency high-frequency signals and low-frequency signals are superimposed to form a composite signal, representing a number. DTMF signaling has 16 code. DTMF signaling can be selected through optional calling.