How to understand the meaning of digital walkie-talkie functions?-Part 1

When using walkie-talkies, we often talk about FPP, Monitor, Scrambler and other functions. Do you know what these functions mean? Today, Retevis Solutiosn will take you to understand the meaning of the functions in the digital walkie-talkie.

What is the standard of digital walkie-talkie?

Usually walkie-talkies have analog, DPMR, DMR, and P25 formats. DMR format is the most commonly used. The analog mode is the traditional mode and the most common application. The main advantage of DMR is trunk communication. The main advantages of DPMR are narrow bandwidth, wide coverage and clear voice quality. The TETRA system has the largest cost and is suitable for occasions with extremely high security requirements, such as the military, public security, etc. Like Retevis RT80 is DMR and analog, Retevis RT53 is DMR.

What is Channel number of digital walkie-talkie?

Channel storage. The parameters of a complete channel include: receiving frequency, transmitting frequency, receiving sub-audio, transmitting sub-audio, transmitting power, channel bandwidth, PTT-ID, busy lock, signaling code, scan addition, channel name etc. Like Retevis RT52 digital radio.

What is Operating mode of digital walkie-talkie?

Retevis RT85 VFO

Digital walkie-talkies have three working modes,  mode is also frequency mode; MR mode is usually also called channel mode; CALL mode is also called call channel, similar to ordinary channel mode.

What is the meanning of FPP of digital walkie-talkie?

FPP (Front pannel programming): Refers to the walkie-talkie getting rid of the constraints of the computer and using the walkie-talkie panel to modify parameters such as frequency.

What is Channel Frequency step of digital walkie-talkie?

Frequency step, also called channel step, step frequency, in frequency mode, when you press the up and down keys, change the frequency step value.

What is Squelch level SQL of digital walkie-talkie?

SQL grade setting squelch adjustment, The lower the squelch level is, the easier it is to interfere. The higher the level, the worse the sensitivity. It is best to set it in the middle. Used to balance anti-interference and long-distance calls.
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 files, and each file is called a level. The number of divisions is called the squelch level. The user can choose according to the actual situation.

What is Wide/narrow band of digital walkie-talkie?

Bandwidth. Channel refers to the frequency value occupied when transmitting and receiving. The frequency difference between adjacent channels is called channel spacing. The prescribed channel spacing includes 25KHz (wideband), 20KHz, 12.5KHz (narrowband), etc.

What is CTCSS/DCS function of digital walkie-talkie?

CTCSS/DCS function. In a frequency point or channel, a specific person's speech can be heard through sub-audio to avoid receiving irrelevant calls. When the walkie-talkie and the repeater are used in cooperation, many people use the same channel. At this time, different sub-audio settings can be used in groups. Note: Using CTCSS/DCS sub-audio channels can prevent you from receiving calls you don't want to hear. But it does not mean that your call is encrypted.

What is Monitor function of digital walkie-talkie?

Monitor function: instantaneous and permanent
That is to manually turn on the squelch circuit, the machine will amplify all the signals through the amplifier circuit, so that the weak signal or no signal back noise can be received and played regardless of whether there is sub-tone.
The receiver accepts all signals. When there is no signal, it is back-noise. The walkie-talkie has a squelch circuit, and it will not work when the signal does not meet certain requirements.
Monitoring is a way of listening to receive weak signals. By pressing the dedicated key to forcibly connect the receiving signal channel, the operator can distinguish the faint sound in the speaker with his ears to achieve the purpose of listening.

What is Remote monitor function of digital walkie-talkie?

Used to open the microphone of a walkie-talkie, but the sound around it has reached. It does not matter whether the other party transmits a signal or not.

What is Scan function of digital walkie-talkie?

In order to hear the conversation of all channels, a listening method is adopted. By pressing the dedicated key, the receiving circuit receives the channel one by one in a certain order for a period of time to listen to the signal 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. Scan all channels on the walkie-talkie that are in use.

What is VOX function of digital walkie-talkie?

When this function is activated, you do not need to press the PTT button, you can directly start the transmission operation by voice.

What is Scrambler function of digital walkie-talkie?

When others set up sub-audio, but your own radio is not set up, you can hear other people's radio conversation; but when others set "scrambling", your own radio is not set up, you can hear a fuzzy sound, but you can not hear the specific content, seems like encrypted the analog radio.

What is Compander function of digital walkie-talkie?

Voice companding function. All transmitted signals are effectively compressed and then transmitted to the receiving end for signal expansion, thereby greatly reducing environmental noise and improving voice quality. Like Retevis RT45 outdoor radio,have Compander function,so it is voice is more quality than Retevis RT49P outdoor radio.

What is TOT function of digital walkie-talkie?

Talk time out timer, TOT: Push to Talk Timeout Timer,
Overtime limiter, this function is used to limit the user to transmit over time on a channel, and also to avoid damage to the walkie-talkie due to long-term transmission. Prevent the speaker from occupying the channel continuously for too long. 1~30 minutes, 1 minute interval for each level, set arbitrarily.This function is very useful in commercial applications. Many of Retevis's walkie-talkies have TOT function, such as Retevis RT81 RT50 RT87 etc.

What is BLC function of digital walkie-talkie?

BCL (Busy Channel lockout),Busy lock, when the current channel has a signal, transmission is prohibited to prevent interference to the normally used channel.

What is Reverse function of digital walkie-talkie?

Reverse scrambling. That is, the transmit frequency and receive frequency of the walkie-talkie will be interchanged, and the set signaling will also be interchanged.
When the walkie-talkie is connected to the repeater, the transmitting frequency and the receiving frequency are different. When the repeater is down and needs to be connected directly, the pilot function can be used to continue the conversation with the radio and the other party does not need to modify the radio parameters. Like Retevis RT80 have Reverse functions.

Each function of the walkie-talkie corresponds to different needs and can meet the needs of different scenarios. Of course, you can also customize the walkie-talkie according to your needs and functions. If you have any needs or suggestions, please contact us: info@ retevissolutions.com