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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".    ...

Radio frequency sweep or frequency sweep or RF sweep apply to scanning a radio frequency band for detecting signals being transmitted there. On Retevis R685 analog radio, you can do a frequency sweeping.   ...

The Difference Between Ham Radio and CB Radio  ...

We often get some questions said" is there a good radio recommend for me entry level amateur? Maybe you are just starting into ham radio and you have no clue what possibilities are even out there. Let us talk about it in this article.  ...

Retevis RA685 is EU version dual band ham radio. The transmit frequency is 144-146Mhz,430-440Mhz, and the receive frequency is 136-174Mhz,400-480Mhz;  ...

How to set the HD1 Rx screen display mode?  ...

Vocoders are basically used for digital coding of speech and voice simulation. The bitrate for available narrowband vocoders is from 1.2 to 64 kbps.  ...

Retevis RT23 is a cross-band repeater HAM Radio, but do you find it can set double or single repeater mode? What's the difference between the two modes?  ...

The General Mobile Radio Service (GMRS) is a licensed radio service that uses channels around 462 MHz and 467 MHz.  ...

Retevis RT84 is a dual band DMR ham radio and supports to import 120,000 contacts. But do you know how to import the contacts csv into the radio?  ...