Digital Mobile Radio (DMR)

From Signal Identification Wiki
Jump to: navigation, search
Digital Mobile Radio (DMR)
DMR.jpg
Frequencies 860 MHzMegaHertz (MHz) 10^6 Hz860,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
860,000 kHzKiloHertz (kHz) 10^3 Hz
,400 MHzMegaHertz (MHz) 10^6 Hz400,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
400,000 kHzKiloHertz (kHz) 10^3 Hz
,512 MHzMegaHertz (MHz) 10^6 Hz512,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
512,000 kHzKiloHertz (kHz) 10^3 Hz
,136 MHzMegaHertz (MHz) 10^6 Hz136,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
136,000 kHzKiloHertz (kHz) 10^3 Hz
,174 MHzMegaHertz (MHz) 10^6 Hz174,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
174,000 kHzKiloHertz (kHz) 10^3 Hz
136,000 kHzKiloHertz (kHz) 10^3 Hz
136 MHzMegaHertz (MHz) 10^6 Hz
860,000 kHzKiloHertz (kHz) 10^3 Hz
860 MHzMegaHertz (MHz) 10^6 Hz
Frequency Range 136 MHzMegaHertz (MHz) 10^6 Hz136,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
136,000 kHzKiloHertz (kHz) 10^3 Hz
- 860 MHzMegaHertz (MHz) 10^6 Hz860,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
860,000 kHzKiloHertz (kHz) 10^3 Hz
Mode NFMNarrowband Frequency Modulation
Modulation 4FSK
ACF Frame: 60 msmilliseconds (.001 of a second). Slot: 30 msmilliseconds (.001 of a second)
Bandwidth 12.5 kHzKiloHertz (kHz) 10^3 Hz12,500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
0.0125 MHzMegaHertz (MHz) 10^6 Hz
12.5 kHzKiloHertz (kHz) 10^3 Hz
0.0125 MHzMegaHertz (MHz) 10^6 Hz
12.5 kHzKiloHertz (kHz) 10^3 Hz
0.0125 MHzMegaHertz (MHz) 10^6 Hz
Location Worldwide
Short Description Digital Mobile Radio (DMR) is an open digital mobile radio standard defined by ETSIEuropean Telecommunications Standards Institute. An independent, not-for-profit, standardization organization in the telecommunications industry in Europe, developing global telecommunications standards. and used in commercial products around the world. Mostly used by private network and local police, can be encrypted. Used in MOTOTRBO products.
I/Q Raw Recording Download file
Audio Sample
Digital Mobile Radio (DMR) is an open digital mobile radio standard defined in the European Telecommunications Standards Institute (ETSIEuropean Telecommunications Standards Institute. An independent, not-for-profit, standardization organization in the telecommunications industry in Europe, developing global telecommunications standards.) Standard TS 102 361 parts 1–4 and used in commercial products around the world. DMR, along with P25 phase II and NXDN are the main competitor technologies in achieving 6.25 kHzKiloHertz (kHz) 10^3 Hz equivalent bandwidth using the proprietary AMBE+2 vocoder.

DMR and P25 II both use two-slot TDMATime Division Multiple Access in a 12.5 kHzKiloHertz (kHz) 10^3 Hz channel, while NXDN uses discreet 6.25 kHzKiloHertz (kHz) 10^3 Hz channels using frequency division. DMR was designed with three tiers. DMR tiers I and II (conventional) were first published in 2005, and DMR III (trunked) was published in 2012, with manufacturers producing products within a few years of each publication. The primary goal of the standard is to specify a digital system with low complexity, low cost and interoperability across brands, so radio communications purchasers are not locked into a proprietary solution. In practice, many brands have not adhered to this open standard and have introduced proprietary features that make their product offerings non-interoperable.

Samples[edit]

DMR Trunking Control Channel:





DMR Idling Channel:




DMR Voice (Half Slot TDMATime Division Multiple Access):

Decoded Audio:

Decoding Software[edit]

Hobby Level Software

Decoding Tutorials[edit]


Video Examples[edit]

Additional Links[edit]

Additional Images[edit]