Interpretation of Chinese and English terms for radio walkie-talkies

Introduction: MONITOR is a listening method used to receive weak signals. By pressing a special key to force the receiving signal channel to be connected, the operator uses his ears to distinguish the weak sound in the speaker to achieve the purpose of listening. SCAN is a listening method used to hear the conversations on all channels...
Keywords: intercom, CTCSS, signaling, intercom copy
MONITOR
is a listening method used to receive weak signals. By pressing a special key to force the receiving signal channel to be connected, the operator uses his ears to distinguish the weak sound in the speaker to achieve the purpose of listening.

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

Priority Channel Scan function
gives priority to the set priority channel during the scanning process. Delete/Add Scan Channel Delete or add a channel from the scan list.

Voice control (VOX)
When this function is activated, you can start the transmission operation 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 transmission time on a channel, and also to avoid damage to the walkie-talkie due to long-term transmission.

Battery Save function:
To save electricity and extend standby time, the radio will shut down for a period of time and start up for a period of time if there is no transmission, reception or key operation for a period of time. This mode is called power saving mode. The ratio of power on and off time is about 1:4. When a signal is received or a key operation is performed, the radio will immediately exit the power saving mode and enter the normal mode.

High/Low power selection function (High/Low power)
This function allows users to select high power or low power according to actual conditions.

Busy Channel Lockout:
When this function is used, the user is prohibited from transmitting signals on busy channels.

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

CTCSS/CDCSS
function Use this function to avoid receiving irrelevant calls.

The 2-TONE/DTMF
selective calling function uses 2-TONE or DTMF signaling to selectively call the corresponding intercom.

Reverse Frequency
When using the reverse frequency function, the transmit frequency and receive frequency of the walkie-talkie will be interchanged, and the set signaling will also be interchanged.

Talk Around
When using the Talk Around function, the transmitting frequency of the intercom becomes the same as the receiving frequency; the transmitting signaling also becomes the same as the receiving signaling.

Auto-Transpond function:
When the intercom receives a correctly coded call, it sends a signal to the caller to respond to the call.

Emergency Alarm:
Press the alarm button and the intercom will sound an alarm at the maximum volume or send a preset alarm code to other handsets or base stations.

Patrol Record:
When a patrol officer arrives at a patrol point, the intercom will receive a query signal from the patrol register, and then automatically start the registration operation, sending its own identity code and other information to the patrol register for registration, indicating that a patrol officer has arrived at the location.

Key lock function (Keylock)
This function can prevent accidental operation of the keys.

The Battery Indicator
displays the battery power.

The backlight function
is used to operate at night or in dim conditions, so that the LCD display and buttons can be clearly seen.

G> Cloning function:
This function allows the data in one intercom to be copied to other intercoms of the same model.

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

Audio
refers to the frequency of human speech, usually in the frequency band of 300Hz-3400Hz. Carrier is the carrier of useful signals such as voice, digital signals, and signaling, and is a high-frequency electromagnetic wave that is easy to transmit.

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 specified channel spacings are 25KHz (wideband), 20KHz, 12.5KHz (narrowband), etc.

2-TONE 2-TONE, two-tone signaling
It consists of two audio signals, A Tone + B Tone. A Tone is sent for a period of time, and then B Tone is sent after a period of time. 2-TONE signaling can be used to select the corresponding intercom to call.

5-TONE 5-TONE, 5-tone signaling
The function is the same as two-tone signaling, the difference is that it consists of five frequencies.

CTCSS (Continuous Tone Controlled Squelch System) , Continuous Voice Controlled Squelch System
Commonly known as sub-audio, it is a technology that adds a frequency lower than the audio frequency (67Hz-250.3Hz) to the audio signal for transmission. Because its frequency range is below the standard audio, it is called sub-audio. After the walkie-talkie demodulates the received signal through the intermediate frequency, the sub-audio signal is filtered and shaped, input into the CPU, and compared with the CTCSS frequency set by the machine to decide whether to turn on the mute.

CDCSS CDCSS (Continuous Digital Controlled Squelch System)
is a continuous digital controlled squelch system. Its function is the same as CTCSS, except that it uses digital coding as the condition for whether the squelch is turned on. DTMF DTMF (Dual Tone Multi Frequency) is composed of a high-frequency group and a low-frequency group. Each high-frequency group contains 4 frequencies. A high-frequency signal and a low-frequency signal are superimposed to form a combined signal, representing a number. DTMF signaling has 16 codes. DTMF signaling can be used to select the corresponding intercom to call.