digital radio

dPMR and DMR are two new digital technologies for PMR voice/data radios. Both technologies have been standardised by ETSI. The DMR system is a two-slot TDMA system offering a range of features and applications (ETSI Standards TS 102 361 and EN 300 113). dPMR® is a FDMA system offering the lowest cost digital voice solution and a similar set of repeater and trunking options to DMR (ETSI Standards TS 102 490, TS 102 658 & EN 301 166). Both standards use 4-FSK modulation variants, DMR using 9600 bps in 12.5 kHz channels and dPMR 4800 bps in 6.25 kHz channels. Both use voice digitally coded with error correction at 3.6 kbit/s. Now,we will contrast DMR and dPMR. About DMR Read…

dPMR–a simple and cost effective digital PMR Technology. It was introduced in 2007 and is an ETSI compliant open FDMA digital protocol. The concept was to offer the market a logical migration solution from analogue to digital radio communications designed around the idea of employing proven technology, compatibility with existing analogue equipment, simplicity and low cost. dPMR is a 6.25 kHz FDMA(Frequency-division multiple access ) based digital radio protocol described in the ETSI technical standards TS 102 490 and TS 102 658. The TS 102 490 standard defines dPMR 446 license-free radio and the TS 102 658 defines Mode 1 peer-to-peer mode, Mode 2 repeater mode and Mode 3 digital trunking. It is specifically targeting highly functional solutions by using lower cost and…

How much do u know DMR? What is the relationship between DMR and TDMA ? DMR Markets & Applications ? want to know more ,pls read belows.

GOON NEWS! Everyone~

NEW DIGITAL RADIO RT8 has started to sell this month, thanks for Retevis funs’ support . Start big sell it ~ many customers asked their difference ,RT2,RT3 and RT8 ,so i do the analysis as below.

RETEVIS RT3 is your best digital DMR radio choice