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Category Archives :Radio Function

What is the difference between Monitor&permanent monitor &remote monitor

What is the difference between Monitor&permanent monitor &remote monitor  ...

Read more  Monitor,  amateurradio

What's the Scrambler function?

The scrambler function of the analog walkie-talkie is to change or mix the communication voice and informations.  ...

Read more  Scrambler,  Analog radio

How about reset to factory?

Compared with business radios, amateur radios have more and more complex functions, so the operation and setting process often leads to abnormal use intentionally or unintentionally. Therefore, almost all amateur radios allow to reset to factory.  ...

Read more  Reset to factory

What is the Channel Work Alone? How does it works on Retevis RT3S DMR Radio?

"Lone Worker" gives a tone at regular intervals to which the lone-worker needs to respond by pressing the PTT button. If the worker fails to respond, within the pre-defined time, the radio will then go into emergency mode, and help and support would be sent to them.  ...

Read more  lone worker,  RT3S lone worker,  Retevis RT3S

What's Selcall

Selcall is short for Selective calling. It is a type of squelch protocol used in radio communications systems, in which transmissions include a brief burst of sequential audio tones.  ...

Read more  Amateur radio,  Selcall

What is roaming? Is it useful? When will it be used?

Retevis RT73 mobile radio and Retevis RB22 Semi-keyboard UHF DMR Radio are both have the roaming function.  ...

Read more  Roaming,  roaming function on DMR radio

Why the parrot test has no response

When we want to test our radio and can't find someone to help us, we can set the parrot channel to do the Echo test. but sometimes the parrot test has no response, why?  ...

Read more  Echo Test,  Parrot,  amateur radio

Something about Busy Channel Lock-out Function

Busy Channel Lock-out feature often abbreviated to BCL on two way radios. But it depends on the different radios, on some radio it says BCL, this is also commonly referred to as TX Inhibit on some other radios. For example, on Retevis RB17P, it says "Busy Lock". but on Ailunce HD1 it says" TX Authority".    ...

Read more  BCL,  Busy Channel Lock-out,  Retevis RB17P,  AilunceHD1

What is the difference between cross band transmit&receive and repeater?

We know Ailunce HD1 has the cross band transmit and receive function, and Retevis RT23 has the cross-band repeater function. do you know what is the difference between cross band transmit&receive and repeater?  ...

Read more  Repeater,  Retevis RT23,  Ailunce HD1