John Davis WB4QDX. Georgia D-STAR
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1 Georgia John Davis WB4QDX Georgia
2 What is? is an open worldwide standard for digital communications over Amateur Radio The standard was developed by the Japan Amateur Radio League (JARL) uses the AMBE vocoder chip under license from DVSI Icom is initial manufacturer of mobiles, HTs, repeaters and controllers Non-Icom hardware and software developed for repeaters, hotspots, access points and accessories Georgia
3 How Works is digital modulation Voice is converted from analog to digital for transmission Data is combined with digitized voice for transmission at 4800 bps 2400 bits for Voice 1200 bits for voice Forward Error Correction 1200 bits for Data Callsign is sent with each transmission Georgia
4 What can 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 (42 now in operation worldwide) Georgia
5 Continues to Grow As of May 15th, 730 Gateways, 1,533 Repeaters and 26,026 registered users Gateways Repeaters Users Georgia
6 Basics Know repeater frequency and callsign The big four parameters: 1. MY - My callsign 2. UR Your callsign (CQCQCQ for general call) 3. RPT1 Repeater callsign/module I m talking to (WD4STR B) 4. RPT2 Where do I want to go? (usually repeater callsign and gateway. example WD4STR G) The magic eighth position Designate module regardless of callsign length (WX4GPB C, W4DOC B, W4PL C) Programming Example for KI4SBA 2 Meter Repeater Frequency: MY: WB4QDX (programmed one time) UR: CQCQCQ RPT1: KI4SBA C RPT2: KI4SBA G
7 Linking Reflectors allow multiple repeaters to connect together No special programming required by users on each repeater First send linking command Link W4DOC C to REF001C Frequency: MY: WB4QDX UR: REF001CL RPT1: W4DOC C RPT2: W4DOC G Then use as local QSO QSO in Linked Mode Frequency: MY: WB4QDX UR: CQCQCQ RPT1: W4DOC C RPT2: W4DOC G To unlink, send U (seven spaces and U) in UR
8 Radio Memory Management - Group One method to organize channels stored in memories: Create a group or bank of memories for each repeater Store commands for each linking function in a memory of the group CH No Frequency Dup Offset TS Mode Name Your Call Sign RPT1 Call Sign RPT2 Call Sign DUP kHz DV KI4SBA C CQCQCQ KI4SBA C KI4SBA G DUP kHz DV UNLINK U KI4SBA C KI4SBA G DUP kHz DV SBA C ID KI4SBA I KI4SBA C KI4SBA G DUP kHz DV REF001C REF001CL KI4SBA C KI4SBA G DUP kHz DV REF002A REF002AL KI4SBA C KI4SBA G DUP kHz DV REF004A REF004AL KI4SBA C KI4SBA G DUP kHz DV REF030A REF030AL KI4SBA C KI4SBA G DUP kHz DV REF030B REF030BL KI4SBA C KI4SBA G DUP kHz DV REF030C REF030CL KI4SBA C KI4SBA G DUP kHz DV ECHOTEST KI4SBA E KI4SBA C KI4SBA G
9 Radio Memory Management - Talk Use this channel for general QSO No linking commands required or repeater already linked CQCQCQ in UR field CH No Frequency Dup Offset TS Mode Name Your Call Sign RPT1 Call Sign RPT2 Call Sign DUP kHz DV KI4SBA C CQCQCQ KI4SBA C KI4SBA G DUP kHz DV UNLINK U KI4SBA C KI4SBA G DUP kHz DV SBA C ID KI4SBA I KI4SBA C KI4SBA G DUP kHz DV REF001C REF001CL KI4SBA C KI4SBA G DUP kHz DV REF002A REF002AL KI4SBA C KI4SBA G DUP kHz DV REF004A REF004AL KI4SBA C KI4SBA G DUP kHz DV REF030A REF030AL KI4SBA C KI4SBA G DUP kHz DV REF030B REF030BL KI4SBA C KI4SBA G DUP kHz DV REF030C REF030CL KI4SBA C KI4SBA G DUP kHz DV ECHOTEST KI4SBA E KI4SBA C KI4SBA G
10 Radio Memory Management - ID Use to see if repeater is linked or unlinked If linked, repeater says Remote system linked Data line will indicate where repeater or reflector linked Return to CQCQCQ channel to talk CH No Frequency Dup Offset TS Mode Name Your Call Sign RPT1 Call Sign RPT2 Call Sign DUP kHz DV KI4SBA C CQCQCQ KI4SBA C KI4SBA G DUP kHz DV UNLINK U KI4SBA C KI4SBA G DUP kHz DV SBA C ID KI4SBA I KI4SBA C KI4SBA G DUP kHz DV REF001C REF001CL KI4SBA C KI4SBA G DUP kHz DV REF002A REF002AL KI4SBA C KI4SBA G DUP kHz DV REF004A REF004AL KI4SBA C KI4SBA G DUP kHz DV REF030A REF030AL KI4SBA C KI4SBA G DUP kHz DV REF030B REF030BL KI4SBA C KI4SBA G DUP kHz DV REF030C REF030CL KI4SBA C KI4SBA G DUP kHz DV ECHOTEST KI4SBA E KI4SBA C KI4SBA G
11 Radio Memory Management - Link Tune to channel and key briefly to initiate link command System will say Remote system linked if successful Return to CQCQCQ channel to talk CH No Frequency Dup Offset TS Mode Name Your Call Sign RPT1 Call Sign RPT2 Call Sign DUP kHz DV KI4SBA C CQCQCQ KI4SBA C KI4SBA G DUP kHz DV UNLINK U KI4SBA C KI4SBA G DUP kHz DV SBA C ID KI4SBA I KI4SBA C KI4SBA G DUP kHz DV REF001C REF001CL KI4SBA C KI4SBA G DUP kHz DV REF002A REF002AL KI4SBA C KI4SBA G DUP kHz DV REF004A REF004AL KI4SBA C KI4SBA G DUP kHz DV REF030A REF030AL KI4SBA C KI4SBA G DUP kHz DV REF030B REF030BL KI4SBA C KI4SBA G DUP kHz DV REF030C REF030CL KI4SBA C KI4SBA G DUP kHz DV ECHOTEST KI4SBA E KI4SBA C KI4SBA G
12 Radio Memory Management - Unlink Tune to channel and key briefly to initiate link command System will say Remote system unlinked if successful Return to CQCQCQ channel to talk CH No Frequency Dup Offset TS Mode Name Your Call Sign RPT1 Call Sign RPT2 Call Sign DUP kHz DV KI4SBA C CQCQCQ KI4SBA C KI4SBA G DUP kHz DV UNLINK U KI4SBA C KI4SBA G DUP kHz DV SBA C ID KI4SBA I KI4SBA C KI4SBA G DUP kHz DV REF001C REF001CL KI4SBA C KI4SBA G DUP kHz DV REF002A REF002AL KI4SBA C KI4SBA G DUP kHz DV REF004A REF004AL KI4SBA C KI4SBA G DUP kHz DV REF030A REF030AL KI4SBA C KI4SBA G DUP kHz DV REF030B REF030BL KI4SBA C KI4SBA G DUP kHz DV REF030C REF030CL KI4SBA C KI4SBA G DUP kHz DV ECHOTEST KI4SBA E KI4SBA C KI4SBA G
13 Radio Memory Management - Echotest Tune to channel, key and speak System will echo back your transmission Return to CQCQCQ channel to talk CH No Frequency Dup Offset TS Mode Name Your Call Sign RPT1 Call Sign RPT2 Call Sign DUP kHz DV KI4SBA C CQCQCQ KI4SBA C KI4SBA G DUP kHz DV UNLINK U KI4SBA C KI4SBA G DUP kHz DV SBA C ID KI4SBA I KI4SBA C KI4SBA G DUP kHz DV REF001C REF001CL KI4SBA C KI4SBA G DUP kHz DV REF002A REF002AL KI4SBA C KI4SBA G DUP kHz DV REF004A REF004AL KI4SBA C KI4SBA G DUP kHz DV REF030A REF030AL KI4SBA C KI4SBA G DUP kHz DV REF030B REF030BL KI4SBA C KI4SBA G DUP kHz DV REF030C REF030CL KI4SBA C KI4SBA G DUP kHz DV ECHOTEST KI4SBA E KI4SBA C KI4SBA G
14 There s a RAT in D-RATS is a full function data communications tool for and more and it s FREE Written by Dan Smith, KK7DS Utilizes low-speed data mode (~1200 baud) PC connects directly to radio (No TNC required) Windows, Linux and Mac versions available Can be used without radio over Internet or with DV Dongle Provides chat, messaging, , forms, file transfer (unattended), mapping (maps included) Georgia
15 for EmComm Voice and data communications in one radio (no TNC required Operates over wide areas with Internet repeater linking (ad-hoc nets) Serves local area through local repeater Same capabilities on simplex Expanded capabilities with no infrastructure required Georgia
16 at Work (Public Service) MS Bike Ride 2010 (Atlanta) 100 mile course from Atlanta to Athens, GA No single repeater covers route Need voice and position information from SAG vehicles used exclusively 3 linked repeaters available to cover course 10 SAG vans use IC-2820 for voice and D-PRS Position info displayed on map at Race Operations Georgia
17 at Work (EmComm) Southeast Tornadoes Early warning with NWS/Skywarn Damage Assessment and Cleanup Search and Rescue GPS position reporting Airborne Photo Transmission Near real time photos from air using ID-1 high speed data on 1.2 GHz Georgia
18 What s Coming to Open standard allows more capabilities to be developed Repeater-based utilities Hotspots Other hardware New radio released Icom 9100 HF through 1.2 GHz Georgia
19 Quiz Fact or Fiction is a proprietary standard is a fad that will go away requires the Internet Only one vendor supports radios are too expensive is too complicated FALSE FALSE FALSE FALSE FALSE FALSE Repeat after me. I LOVE Georgia
20 QUESTIONS?
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