D-STAR System D-mystified. Brian Roode, NJ6N
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1 D-STAR System D-mystified Brian Roode, NJ6N
2 Who Am I? SOARA Repeater Team Unix Systems Programmer D-STAR gateway management team d*chat Author
3 D-Star System Overview
4 Baseband Allocation DV Radios (ID-1, ID-800, IC-91AD, IC-2820, ) Digital Voice 2400 bps Voice Forward Error Correction 1200 bps Low Speed Digital Data 1200 baud Total base-band 4800 baud Occupied 3dB khz Channel Spacing ~ 10 khz DD Radios (ID-1) No Voice High Speed Data Transfer 128 kbps Occupied 3 db 130 khz Channel Spacing ~ 200 khz
5 D-STAR Packet Structure Header Payload DV Digital Voice & Data S Y N C Ctrl Flags Call-Sign Data FCS Voice Voice Voice Frame Data Frame Data Data Frame F C S Note: 11 Voice & Data Frames/Packet bits Header Payload DD High Speed Data S Y N C Ctrl Flags Call-Sign Data FCS Ethernet Packet bytes
6 Each Radio Has 4 Call Sign Fields to be Programmed Operating Frequency MyCall UrCall Rpt 1 Rpt 2 Simplex or Duplex Source Call sign Destination Call Sign 1 st Repeater 2 nd Repeater
7 Packet Header Structure D-STAR Call-Signs Error Detection Sync Control Identification B i t S y n c F r a m e S y n c Flag 1 Flag 2 Flag 3 RPT 1 RPT 2 UrCall MyCall MyCall Suffix FCS 64 bit 15 bit 1 Byte Each 8 bytes each 4 bytes 2 bytes
8 D-STAR Simplex Call
9 Local Zone (Repeater) Call
10 Gateway Call
11 D-STAR by the Numbers 119 repeater systems internationally 784 users registered on gateways 44 gateways on the US Root trust server users using gateways each day!
12 Remote Zone CQ Call
13 Available Applications DStarlet d*chat Dstarusers.org D-PRS interface/javaprssrvr usmartdigi D-Gate D-STAR Gateway D- STAR/APRS Interface D-STAR query Opendstar.org Applications
14 DStarlet DStarLet is a web-based text messaging application using D-Star digital data technology. Java based server can run on Windows, MacOS, or Linux. Clients can use any web browser. Multiple browser windows on the same or multiple computers can be used to create, send, receive, and manage multiple messages in parallel. The status of all incoming and outgoing messages are displayed in any browser window on any computer. Messages are error corrected. A communications log of all messages sent/received can be viewed on any browser. Authored By: Dean Gibson, AE7Q
15 D*Chat Runs on Windows Enables text based communications between multiple stations simultaneously. Runs on repeater, through the gateway, or on simplex frequency. Customizable Can send periodic QST message. Filters GPS data from the message stream. Has 7 quick send text message slots Authored By Brian, NJ6N
16 DSTARusers.org Provides listing of most recently heard stations, time, reporting node geographical locale and maps of repeater locations. Links to APRS location information See
17 D-STARusers.org Home
18 Jfindu Locator Site
19 D-STAR Repeater Directory
20 D-STAR Solutions
21 Adding a New D-STAR Gateway to the Network
22 D-PRS interface/javaprssrvr D-PRS applications allowing the use of standard APRS clients to map D-STAR GPS activity See dstarusers.org/solutions.html Authored by: Pete Loveall, AE5PL
23 usmartdigi D-Gate D-STAR Gateway Standalone APRS digipeater Reformats D-STAR GPS data into APRS packet format to provide a gateway to APRS. Module goes inside the TNC-X See Developed By: Rich Painter, AB0VO, Painter Engineering Inc.
24 D-STAR query Allows remote users to interact with a preconfigured program on a remote computer over D-STAR DV low-speed data link. Using a preformatted query string on the low speed data link, append any received parameters, execute the program, and send the generated data back to the requestor. Authored by Pete Loveall, AE5PL
25 Opendstar.org Applications dshark D-Star packet protocol analyzer dswatch Shows gateway synchronization information in real time. decho The application is invoked by entering repeater call-sign and E into the UrCall field (e.g. K6SOA E). The repeater will record your transmission and play it back upon un-keying. Authored By: Robin Cutshaw, AA4RC
26 Important Development Underway Open Source Gateway can provide new D- Star functionality, e.g. conference bridging AMBE Dongle Provides AMBE 2020 interface between a radio and computer through USB port. Computer can monitor and process baseband packet stream Many more uses
27 D-STAR User Radios
28 More Information SOARA - Recently Heard report Icom Forums - ARRL Homebrew Digital Transceiver D-Star Specification STAR.pdf
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