DMR: A NEW MODE FOR AMATEUR DIGITAL RADIO Slides for Nashua Area Radio Club Feb. 2, 2016 By Bill Barber, NE1B
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1 DMR: A NEW MODE FOR AMATEUR DIGITAL RADIO Slides for Nashua Area Radio Club Feb. 2, 2016 By Bill Barber, NE1B
2 Digital Mobile Radio An ETSI published worldwide standard Over a DOZEN manufacturers of radios (Connect Sysems,Tytera, Vertex, Motorola, Kenwood and Alinco) Superior voice quality (AMBE+2) vs older digital modes (AMBE, IMBE, GMSK) Longer battery life! Automatic Roaming! Supports multiple talk groups on one freq. Supports data applications (txt, ,gps)
3 DMR Associa<on Equipment Mfg Members
4 DMR Standard-ETSI TS Tier 1 (Unlicensed) FDMA, Consumer applications,.5 watt dpmr (446 MHz European unlicensed service) Tier 2 (Conventional) 2-slot TDMA IP Site Connect (Vendor specific) Tier 3 (Trunked) 2-slot TDMA Multi-channel, Multi-Site
5 Amateur Digital Voice Systems D-STAR (Icom) GMSK/AMBE Vocoder P25 Phase 1 (Multi-Vendor) FDMA/IMBE Vocoder P25 Phase 2 (Multi-Vendor) 2-slot TDMA/AMBE+2 Vocoder System Fusion (Yaesu) FDMA/C4FM/AMBE+2 Vocoder DMR (Multi-Vendor) 2-slot TDMA/AMBE+2 Vocoder
6 ] TWO Repeaters in One! Lower infrastructure cost, 1 box in rack TWO voice/data channels from one repeater
7 Half the Channel Bandwidth 16K0F3E 7K60FXE f c f c f c 6.25 f c f c f c Traditional Analog 25 khz Channel Bandwidth 1 Channel 1 Repeater DMR 12.5 khz Channel Bandwidth 2 Channels 1 Repeater
8 More Spectrum Efficient than Older Digital Modes f c f c f c f c f c f c Guard Band as large as 10 khz between channels Total BW= 22.5 khz No Guard Band between 2 channels Total BW= 12.5 khz
9 BeTer Signal Quality No hiss, popping, or static Better RF range than older digital technologies Forward Error Correction and Cyclic Redundancy Check coders
10 BeTer Audio Quality Listen for yourself. DMR does sound better than older digital technologies.
11 Longer BaTery Life Older Digital Modes (FDMA) DMR (TDMA) For each hour of usage the TDMA radios show between 19% and 34% less battery capacity is required than for the FDMA models. 40 percent improvement in talk time in comparison with analog radios
12 Data and Voice at the Same Time Slot 1 Voice Slot 2 GPS Location (or second channel voice when not sending GPS data) Give your location WHILE talking!
13 IP Site Connect 1 or 2 slots (channels) Link statewide/regionwide systems Peer Peer Peer Master Bridging Hardware Master Peer Peer Master Peer
14 IP Site Connect A peer can participate with one or both time-slots Peers register with the Master Master keeps peers informed about other peers Master/Peers function as a fully meshed network for voice and data traffic If the Master fails, the full mesh network continues to operate, but new peers can not join nor are changes announced A third-party bridge (c-bridge or SmartPTT) is used to interconnect IP Site Connect networks
15 c-bridges Links master repeaters (groups of 15-20), and bridges Mfrs: Rayfield Communications, TL-Net Provides arbritration. If two users key up simultaneously, one gets denied and immediately is notified to prevent dual transmissions.
16 Dynamic Mixed Mode: Analog First in First Out Analog OR Slot 1 TDMA Slot 1 TDMA Slot 2 TDMA Repeater dynamically detects the type of input IP site connect is supported on digital modes Slot 2 TDMA This is an option for a phased migration from analog to networked DMR repeaters.
17 Free Text Messaging Send to one person, or a group of people. - Weather Alerts - Club Meetings - Announcements
18 Motorola Amateur Radio Clubs and other private repeater owners 500+ site network in 47countries Also bridged to other networks DCI, NorCal, AZ, NC, MI, KS, CO and Texas DMR networks 100% Pure Digital More than 24,000 registered users To register or learn more
19 Go to Google Networks Map
20 Local DMR Repeaters NH Hudson K1MOT NH - Hudson K1MOT NH Derry K1QVC NH - Chester K1OX NH - Manchester W1RCF NH - Goffstown N1PA NH - Bow K1OX MA Chelmsford N1IW MA Acton NO1A MA - Southboro AE1C
21 New England and Mari<mes Recent Network Expansions Fredericton, NB Moncton, NB St. John, NB Calais, ME Bangor, ME Augusta, ME Mt. Ascutney, VT Pico Peak, VT More sites welcome!
22 Amateur DMR Growth by # Radio IDs JAN-09 APR-09 JUL-09 OCT-09 JAN-10 APR-10 JUL-10 OCT-10 JAN-11 APR-11 JUL-11 OCT-11 JAN-12 APR-12 JUL-12 OCT-12 JAN-13 APR-13 JUL-13 OCT-13 JAN-14 APR-14 JUL-14 OCT-14 JAN-15 APR-15 JUL-15 OCT-15 JAN-16
23 Amateur DMR is Trending Jan 2013 = 2511 Users Jan 2014 = 4618 Users Jan 2015 = 9802 Users Jan 2016 = 24,388 Users This past year, a 149% increase. Primarily fueled by the competition among radio manufacturers and features offered.
24 Customer Programming SW
25 XPR4550 Mobile
26 MD782 mobile
27 DMR Radios
28 SL+XPR7550 Portables
29 PD782 portable
30 MTR w.repeater
31 XPR w. Repeater
32 K1MOT Hudson Site 145 and 447 MHz MotoTRBO 50 watt Repeaters on 1400 VA UPS Kohler 14 KW Auto-start Generator
33 Tait TB9300 DMR Repeater Dual 50W Repeaters Dual 100W Repeater 1000 Channels; uses modules of TB9100 for P25 to DMR conversion! Should support Conventional DMR (Tier2) in 2 nd firmware revision!
34 Ham Friendly Dealers Sandy s Comm., contact Jeff, TwoWayDigitalRadio.com, contact Ken Connect Systems E-Bay or Local Dealers TRBO DMR radios are DMR and-analog monoband
35 Some DMR Web Sites (check out the links below) (WW Net) (New England)
36 DMR: A NEW MODE FOR AMATEUR DIGITAL RADIO Spectrum Efficient! Supported by multiple manufacturers! Automatic Roaming for Safe Driving! Longer Battery Life! 3 Year Warrantees on many radios Resilient Networks (no servers needed at sites) To learn more
37 Ques<ons? Contact Bill Barber, Or
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