Monitoring (MONITOR)

A listening method used to accept weak signals. By pressing a special button to forcefully connect the receiving signal channel, the operator uses his ears to identify the weak sound in the speaker to achieve the purpose of listening.

Scan (SCAN)

A listening method used to hear calls on all channels. By pressing a special key, the receiving circuit receives channels one by one in a certain order for a period of time to listen to the signals in the channel. If the reception time of each channel is 100ms, ten channels can be scanned per second, that is, the scanning speed is 10ch/s.

Priority Channel Scan function (Priority Channel Scan)

Priority scans the set priority channel during the scanning process.

Delete/Add Scan Channel (Delete/Add Scan Channel)

Delete or add a channel from the scan list to the scan list.

Voice control (VOX)

When this function is activated, the transmitting operation can be started directly by voice without pressing the PTT button.

Transmission time limit function (TOT: Time Out Timer)

This function is used to limit the user's timeout transmission on a channel, and also to prevent the radio from being damaged due to long-term transmission.

Battery Save

In order to save power and extend the standby time, if the walkie-talkie has no transmission, reception or button operation for a period of time, it will shut down for a period of time, It works in the power-on mode, which is called power-saving mode. The ratio of power on and off time is approximately 1:4. When a signal is received or a button is pressed, the radio immediately exits the power saving state and enters the normal state.

High/Low power selection function (High/Low power)

This function allows users to select high power or low power according to the actual situation.

Busy Channel Lockout

When using this function, users are prohibited from transmitting signals on busy channels.

Squelch Level

The intensity of the noise in the received signal corresponds to the intensity of the signal. The stronger the signal, the weaker the noise. Divide the maximum noise and the minimum noise into several levels, and each level is called a level. The number of levels it is divided into is called the squelch level. Users can choose according to actual conditions.

CTCSS/CDCSS function

Use this function to avoid receiving irrelevant calls.

2-TONE/DTMF selective calling function

Use 2-TONE or DTMF signaling to select and call the corresponding intercom.

Reverse Frequency

When using the reverse frequency function, the transmitting frequency and receiving frequency of the walkie-talkie will be interchanged, and the set signaling will also be interchanged.

Talk Around function

When using the off-network function, the transmitting frequency of the walkie-talkie becomes the same as the receiving frequency; the transmitting signaling is also converted to the same as the receiving signaling.

Auto-Transpond function (Auto-Transpond)

When the walkie-talkie receives a correctly coded call, it sends a signal to the calling party to respond to the call.

Emergency Alarm

Press the dedicated alarm button, and the intercom will sound the alarm at the loudest volume or send a predetermined alarm code to other handheld devices or base stations.

Patrol Record

When the patrol personnel arrive at the patrol point, the walkie-talkie will receive the query signal from the patrol register, and then automatically start the registration operation and enter his or her identity code. The information is sent to the patrol register for registration, indicating that a patrol officer has arrived at the location.

Keylock function (Keylock)

Use this function to prevent misoperation of keys.

Battery Indicator

Displays the battery power.

Lighting function (Backlight)

Used to operate at night or in dim conditions to see the LCD display and buttons clearly.

Copy function (Cloning)

This function allows the data in one walkie-talkie to be copied to other walkie-talkies of the same model. Modulation

Use one or several parameters of the modulation signal to control changes in the parameters of the carrier. According to the different control parameters, modulation can be divided into amplitude modulation, frequency modulation and phase modulation.

Audio

Audio refers to the frequency of human speech, usually the frequency band of 300Hz-3400Hz.

Carrier wave

The carrier of useful signals such as voice, digital signals, signaling, etc., high-frequency electromagnetic waves that are easy to transmit. Modulation uses one or several parameters of the modulation signal to control changes in the parameters of the carrier. According to the different control parameters, modulation can be divided into amplitude modulation, frequency modulation and phase modulation.

Channel and channel spacing

Channel refers to the frequency value occupied during transmission and reception. The frequency difference between adjacent channels is called channel spacing. The prescribed channel spacing is 25KHz (wideband), 20KHz, 12.5KHz (narrowband), etc.

2-TONE

2-TONE, two-tone signaling, consists of two audio signals, A Tone + B Tone. First send A Tone for a period of time, then after a period of time, send B Tone. 2-TONE signaling can be used to selectively call the corresponding intercom.

5-TONE

5-TONE, 5-tone signaling, has the same function as two-tone signaling, but the difference is that it is composed of five frequencies.

CTCSS

CTCSS (Continuous Tone ControlledSquelch System), a continuous voice controlled squelch system, commonly known as sub-audio, is a frequency that will be lower than the audio frequency (67Hz-250.3Hz) A technology that is transmitted along with the audio signal. Because its frequency range is below standard audio, it is called sub-audio. After the walkie-talkie demodulates the received signal at an intermediate frequency, the sub-audio signal is filtered, shaped, and input into the CPU. It is compared with the CTCSS frequency set by the unit to determine whether to turn on mute.

CDCSS

CDCSS (Continuous Digital Controlled Squelch System), a continuous digital controlled squelch system, has the same function as CTCSS. The difference is that it uses digital encoding to determine whether mute is turned on. conditions.

DTMF

DTMF (Dual Tone Multi Frequency), dual tone multi-frequency, consists of a high frequency group and a low frequency group. The high and low frequency groups each contain 4 frequencies. A high-frequency signal and a low-frequency signal are superimposed to form a combined signal, which represents a number. DTMF signaling has 16 codes. DTMF signaling can be used to selectively call the corresponding intercom.

Feeder (Antenna Feeder)

The RF line connected from the RF output end of the base station to the antenna, usually using a coaxial cable.

Channel

In a narrow sense, a channel is the transmission medium through which signals are transmitted from the transmitter to the receiver. Broadly speaking, in addition to the transmission medium, a channel also includes related equipment for transmitting signals.

Frequency Hopping

A spread spectrum technology that uses carrier hopping to achieve spectrum broadening.

Radio Frequency (Radio Frequency)

Represents electromagnetic frequencies that can be radiated into space, with a frequency range between 300KHz and 30GHz.

Voice Operated Transmit

A function of the walkie-talkie. After turning on this function, you can start transmitting by speaking into the microphone on the headset without pressing the PTT button.

Whisper

A function of the walkie-talkie. After turning on this function, even if the transmitter speaks quietly, the receiver can hear louder sounds.