don hinsman – n4vip alden oyer – ag5s alan hill – n5bgc ed james – ka8jmw
TRANSCRIPT
Don Hinsman – N4VIP
Alden Oyer – AG5S
Alan Hill – N5BGC
Ed James – KA8JMW
What is D-STAR?
D-STAR is an open standard for digital voice and data on Amateur Radio
Developed by Japan Amateur Radio League (JARL)
Uses AMBE vocoder chip from DVSI (only proprietary part in D-Star)
Icom is first manufacturer with base, mobile, handhelds and repeater equipment (non-proprietary)
How does D-STAR work? Voice is converted to digital modulation
and transmitted at 4800 bps○ 2400 bits for voice○ 1200 bits for Forward Error Correction on voice○ 1200 bits for data
Voice and data occupy one 6.25 KHz signal (versus 12.5 KHz FM voice, P25, NXDN and MotoTRBO)
Can operate simplex, repeater or linked to other repeater(s)
What can D-STAR Do?
Transmit or receive voice and 1200 baud data simultaneously on 2m, 440 and 1.2 GHz (no TNC required)
128 Kb data transmission on 1.2 GHz with Internet connectivity (Ethernet bridge to Internet with IP address)
D-PRS (digital APRS) automatic position reporting simultaneous with voice with GPS
Flexible repeater linking with Gateway and Internet connection
Reflectors act as conference bridge for linking multiple repeaters (57 now in operation worldwide)
DV Dongle and DV Access Point (DVAP) allow voice and data access to D-STAR via Internet connection (similar to EchoLink)
D-STAR Continues to Grow As of October 20, 2012 – 987 Gateways,
~2,072 Repeaters and 24,630 registered users
Users
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D-STAR Reflectors and Nets 57 reflectors available worldwide to act as “conference bridges”
linking multiple repeaters, Dongle, DVAP, hotspot users
Each reflector has four separate modules for independent conference bridges (A, B, C, D) and echo function (E)
○ Many use module D exclusively for data functions
52 regional, national and international nets established through reflectors
Linking repeaters to reflectors allows local users to participate with no special programming
View repeaters and users connected to reflectors (http://refnumber.dstargateway.org/status.html)
Complete Net listing on www.DSTARinfo.com
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Typical D-Star Handheld (ID-31A) UHF (analog FM, Digital Voice), 5W GPS receiver Global D-Star repeater list pre-
programmed microSD card 1252 Memory channels, all NM FM & all
Southwest D-Star repeaters
D-Star demonstration
FM – simplex and repeater (442.825 MHz)
Digital voice – simplex and repeater (442. MHz)
Echo Linked (through W5PMZ to W5SF) DV Dongle, Acces Point and Node
Adapters (KA8JMW)
DV Dongle, Access Point and Node Adapters
Dongle provides access to D-STAR repeaters via PC without radio
Access Point creates instant local access point for limited area without D-STAR repeater
Node Adapter provides D-STAR interface to FM radio and can be used to create hotspot or repeater
EmComm operation
Quickly setup linked repeaters building ad-hoc networks
Without Internet, repeater still provides expanded voice/data features
Without repeater, simplex operation still provides expanded capabilities
D-RATS
By Dan Smith - KK7DS
Chat
FTP style file transfers
Messaging including E-mail
APRS like mapping
OVERVIEW
Chat
Free-form multicast chat messages– Checksum-protected– No ACK/NAK from remote stations (yet)– Channels and “private” chat– Automated QSTs– Quick messages
Messaging Email gateway
SMTP for outgoing emails Rich forms go as HTML emails POP3 gateway for remote mail checks
WL2K gateway Any internet-connected station can gateway Experimental RMS packet client Seamless and bi-directional
SMTP/POP3 servers integrated Paclink-like functionality
File transfer
Ratflector
Connect to other D-RATS users via Internet Easy and clean for testing Data-only reflector Configure D-RATS radio port for one of:
Network port on ref.d-rats.com, port 9000 Network port on ref.d-rats.com, port 9001
User-run ratflectors too! Included in download