Retevis RT90 Latest Dual Band DMR Mobile Radio will coming soon on 27th September. The RT90 gives you the crystal clear, noise-free audio of over-the-air digital communications in your vehicle, full analog transceiver capabilities. RT90 supports analog and digital modes so you can enjoy the best of both. It provides dual-band support, operating on both […]
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RT82 is two slots dual band IP67 DMR radio, compatible with Motorola Tier Ⅰ&Ⅱ. Many hams and retevis fans who are interested in this radio, wanna know how to upgrade firmware for it, to make it more perfect. How to upgrade RT82 firmware?
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Retevis has many kinds of walkie talkies earpieces, some customers wanna know what’s Retevis walkie talkie catagory and how to choose? Let’s discuss together.
What’s Retevis walkie talkie earpiece catagory? Read More »
2-Way Radio Frequently Asked Questions Can a VHF radio communicate with a UHF radio? Can a VHF or UHF Two way radio talk to FRS radios? Should I use VHF or UHF Two way radio? Can Planet Headset Black Box Plus and Bantam radios “talk” to my old radios? How long will my two way
FRS/GMRS/MURS/CB/NWR Frequency and so on the difference Power and Frequency When talking about radios, the first thing that comes to anyone’s mind is range. How far can they transmit? It’s an important detail worthy of a quick discussion before we move on into the different radio services available to you for communication. Two key variables
FRS/GMRS/MURS/CB/NWR Frequency and so on the difference（1） Read More »
DCS CDCSS or Digital Code Squelch (DCS) is a further development of the continuous tone-coded squelch system or CTCSS that uses a slow-speed, binary data stream passed as sub-audible data along with the transmission. Motorola calls this Digital Private Line or DPL. It consists of a 23-bit telegram sent repeatedly on the channel at
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CTCSS? DCS? Sub-channels? Yes, Continuous Tone Coded Squelch System. Introduced by Motorola in the early 1960s, as “Private Line” (also known as GE/Ericsson’s “Channel Guard”, E.F. Johnson’s “Call Guard”, RCA’s “Quiet Channel”), known by many as simply “tone squelch”. This is like a mains hum on the modulation, a constant musical note… almost as if
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The Continuous Tone Coded Squelch System, commonly referred to as CTCSS, has been in used in the land mobile radio arena from the late 1960’s. It is known by a number of different trade names such as Private Line® (PL) by Motorola, Channel Guard® (CG) by General Electric and generically as tone squelch. It is
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This article covers UHF Citizen Band (CB) class licensed (public spectrum) radios. VHF is used in marine applications where range over unobstructed surfaces / water is more important. Ultra High Frequency (~477MHz in Australia) does have significant ability to penetrate objects and is better in built up environments. If you’ve used a cellphone, you’ve used
How to choose their own walkie-talkie – UHF CB Radios Read More »
