Transcript Slide 1 - CCDX Amateur Radio Club

DMR: A NEW MODE
FOR AMATEUR
DIGITAL RADIO
David Andrews, N1ESK, West River Radio Club
10 Feb 2016 CCDX, Keene, NH
K1KU sends his regards…
Darrel Daley,
Putney’s aging, but
still Premier
Pontificating Pundit,
could not make it.
He just received his
new portable radio
and is busy testing it
out..
Analog Repeaters
• Standalone repeaters
• Difficult to Link for Wide Area coverage
• Expensive
• Not Spectrum Efficient
• Static – Not Nimble
• Who Knows the Codes??
• Who Really Knows What is Linked to What??
Digital Mobile Radio
 An ETSI published worldwide standard
 Over a DOZEN manufacturers of radios
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(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,email,gps)
Time For a Few Definitions
 ETSI – European Telecommunications
Standards Institute
 Vocoder – A category of voice codec that
analyzes and synthesizes the human voice
signal for audio data compression
multiplexing, voice encryption, voice
transmission, etc.
Vocoder Progression
 AMBE (D-Star, Inmarsat, Iridium,
XM Radio)
 IMBE (P-25 Phase 1)
 AMBE+2 (P-25 Phase 2, Fusion,
DMR)
Modulation Schemes
 GMSK – Gaussian minimum shift keying
 D-Star
 FDMA – Frequency division multiple access
 System Fusion / P25 Phase 1
 TDMA – time division multiple access
 P-25 Phase 2 / DMR
DMR Association
Equipment Mfg Members
DMR Standard-ETSI TS 102 361
 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
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
TWO Repeaters in One!
 ]
Lower infrastructure cost, 1 box in rack
TWO voice/data channels from one repeater
Half the Channel Bandwidth
16K0F3E
fc - 12.5
fc
fc + 12.5
7K60FXE
fc – 6.25
fc
fc + 6.25
Traditional Analog
25 kHz
Channel Bandwidth
DMR
12.5 kHz
Channel Bandwidth
1 Channel
1 Repeater
2 Channels
1 Repeater
More Spectrum Efficient
than Older Digital Modes
fc – 11.25
fc
fc + 11.25
Guard Band
as large as 10 kHz
between channels
Total BW= 22.5 kHz
fc - 6.25
fc
fc + 6.25
No Guard Band
between 2
channels
Total BW= 12.5 kHz
Better Signal Quality
 No hiss,
popping, or static
 Better RF range
than older digital
technologies
 Forward Error
Correction and
Cyclic
Redundancy
Check coders
So What Does It Sound Like?
 TG 9998 (more to come on this in
a few minutes) is a Parrot Channel,
used for testing systems and
radios. You transmit to the parrot
server, and it time delay repeats
your audio.
Better Audio Quality
 Listen for yourself. DMR does sound better
than older digital technologies.
How about a real conversation?
Short QSO with K9VO outside
Chicago, using TAC310
Longer Battery 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 “
http://dmrassociation.org
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!
IP Site Connect
1 or 2 slots (channels)
Link statewide/regionwide systems
Peer
Peer
Bridging
Hardware
Peer
Master
Peer
Peer
Master
Master
Peer
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
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.
C-Bridge
New England Digital Networks
 DMR-MARC
 EWARN
 MIT
 HYTERA
Dynamic Mixed Mode:
First in – First Out
Analog
Analog
OR
Slot 1 TDMA
Slot 1 TDMA
Slot 2 TDMA
Slot 2 TDMA
Repeater dynamically detects the type of input
IP site connect is supported on digital modes
This is an option for a phased migration from
analog to networked DMR repeaters.
Free Text Messaging
Send to one person, or a group of
people.
- Weather Alerts
- Club Meetings
- Announcements
 Motorola Amateur Radio Clubs and other private



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
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
http://dmr-marc.net
Go to Google
Networks Map
Local DMR Repeaters
 VT – Brattleboro WR1VT 444.400
 VT – Mt. Ascutney W1UWS 448.475
 VT – Pico W1IMD 444.500
 NH – Hudson K1MOT 145.26
 NH - Hudson K1MOT 447.725
 NH – Derry K1QVC 145.31
 NH - Chester K1OX 145.19
 NH - Manchester W1RCF 145.22
 NH - Goffstown N1PA 145.20
 NH - Bow K1OX 145.17
New England and Maritimes
 Recent Network Expansions
 Fredericton, NB
 Moncton, NB
 St. John, NB
 Calais, ME
 Bangor, ME
 Augusta, ME
 Mt. Ascutney, VT
 Pico Peak, VT
 Keene, NH coming soon!
More sites welcome!
Amateur DMR is Trending
 Jan 2013 = 2511 Users
Amateur DMR is Trending
 Jan 2013 = 2511 Users
 Jan 2014 = 4618 Users
Amateur DMR is Trending
 Jan 2013 = 2511 Users
 Jan 2014 = 4618 Users
 Jan 2015 = 9802 Users
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.
Customer Programming SW
XPR4550 Mobile
MD782 mobile
DMR Radios
SL+XPR7550 Portables
PD782 portable
MTR-3000 100 w.Repeater
XPR-8400 50 w. Repeater
SLR-5700 50 watt Repeater
K1MOT Hudson Site
145 and 447 MHz MotoTRBO
•
50 watt Repeaters on
• 1400 VA UPS
• Kohler 14 KW Auto-start
Generator
WR1VT Site
•
•
•
•
•
146.865 Analog
444.400 MHz DMR
50 watt Repeaters on
1500 VA UPS
Kohler 30 KW Auto-start
Generator
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 2nd firmware revision!
Talk Group Hierarchy
Consult www.nedecn.org for current
Hierarchy
Talkgroups Planned for Keene
Time Slot #1 - Group Call 1 = World Wide (Sat. Net)
Time Slot #1 - Group Call 13 = WW English
Time Slot #1 - Group Call 3 = North America
Time Slot #1 - Group Call 3172 = Northeast
Time Slot #2 - Group Call 3181= New England
Time Slot #2 - Group Call 8 = Region North
Time Slot #2 - Group Call 3150 = VT Statewide
Time Slot #2 - Group Call 3133 = NH Statewide (PTT)
Time Slot #2 - Group Call 3125 = MA Statewide (PTT)
Time Slot #2 - Group Call 9 = Local Site
Note: All New England repeaters also have TAC310,
TAC311, UA113, UA123
Talkgroups Planned for Keene
Time Slot #1 - Group Call 1 = World Wide (Sat. Net)
Time Slot #1 - Group Call 13 = WW English
Time Slot #1 - Group Call 3 = North America
Time Slot #1 - Group Call 3172 = Northeast
Time Slot #2 - Group Call 3181= New England
Time Slot #2 - Group Call 8 = Region North
Time Slot #2 - Group Call 3150 = VT Statewide
Time Slot #2 - Group Call 3133 = NH Statewide (PTT)
Time Slot #2 - Group Call 3125 = MA Statewide (PTT)
Time Slot #2 - Group Call 9 = Local Site
Note: All New England repeaters also have TAC310,
TAC311, UA113, UA123 (All on TS1)
Ham Friendly Dealers
 Sandy’s Comm., contact Jeff,
866.993.9011
 TwoWayDigitalRadio.com, contact Ken
706.896.0000
 Connect Systems http://csi-radios.com/
 E-Bay or Local Dealers
TRBO DMR radios are DMR–and-Analog
monoband
Some DMR Web Sites
(check out the links below)
 http://dmr-marc.net/ (WW Net)
 http://nedecn.org (New England)
How To Get Started
 Amateurs must register with the central DMR database to obtain a
Subscriber ID. An amateur cannot operate a DMR radio without the
Subscriber ID.
 http://www.dmr-marc.net/cgi-bin/trbo-database/register.cgi
 Each radio must be defined with a subscriber ID.
 Amateurs normally will not register no more than two IDs. ◦
 1) Portable radio ◦
 2) Mobile radio
 Encouraged to register up two subscriber ids per call sign only.
 Radios with the same Subscriber ID – only one can be in use at the
same time.
Important: Do, Don’t, & Never
If you purchase radio from Connect Systems, use their firmware updates
◦ DO NOT USE MANUFACTURES FIRMWARE UPDATES – YOU WILL
LOOSE AMATEUR RADIO FEATURES
Never use encryption settings on a radio
◦ Forbidden by the FCC – Part 97
Never use GPS
◦ Unless the repeater is specifically configured to a data channel.
Never use Private Call
◦ Occupies a TS which blocks fellow hams.
Never make a DMR emergency call
◦ No emergency systems are configured in this network
Never use Lone worker settings
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 http://dmr-marc.net
Questions?
Contact David Andrews, N1ESK,
[email protected]