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D-STAR is an open worldwide standard for digital communications over Amateur.
Radio. ▫. The D-STAR standard was developed by the Japan Amateur.
D-STAR Operation and Programming John Davis WB4QDX
What is D-STAR?
D-STAR is an open worldwide standard for digital communications over Amateur Radio The D-STAR standard was developed by the Japan Amateur Radio League (JARL) D-STAR uses the AMBE 2000 vocoder chip under license from DVSI Icom is initial Amateur Radio manufacturer of mobiles, HTs, repeaters and controllers
How D-STAR Works
D-STAR is digital modulation Voice is converted from analog to digital for transmission Data is combined with digitized voice for transmission at 4800 bps Callsign is included with each transmission Calls are routed by callsign
What can D-STAR Do?
Transmit and receive voice and 1200 baud data simultaneously on 2m, 440 and 1.2 GHz 128 Kb data transmission on 1.2 GHz with Internet connectivity DPRS automatic position reporting simultaneous with voice Repeater linking with Gateway and Internet connection Connect to other station regardless of location Users can connect to D-STAR systems via PC with DV Dongle (similar to EchoLink)
D-STAR Basics
Each radio has four callsigns to program MYCALL (MY) URCALL (UR) RPT1 RPT2
Originating User (your callsign) Destination User (or CQCQCQ for call) Originating Repeater Local Destination Repeater or Gateway
Each repeater module is designated with a letter in the 8th position (ex. WD4STR C): C – VHF (2m, DV) B – UHF (70cm, DV) A – 1.2 GHz (23cm voice, DV) A – 1.2 GHz (23cm high speed data, DD) G - Gateway
D-STAR Programming Basics
Every CALLSIGN field will have 8 characters
• The 8th character is a port designator for the System/Gateway fields (if left blank, the system assumes PORT A is used)
ONLY use designated letters in the 8th position (no numbers)
Repeaters should use club calls not the callsign of a user (a callsign cannot be a user and repeater)
Watch your Callsign usage • • • • •
N9JA A is OK W4OZK2 is OK WB4QDX B is OK AA4RC C is OK (note double space after callsign) N9JAA is NOT ok (This is a legitimate callsign for another person)
Basic Programming (Simplex)
Tune to desired simplex frequency
Callsign Programming
MYCALL = WB4QDX RPT 1 = not used RPT 2 = not used URCALL = CQCQCQ
Results • I can talk to other D-STAR users tuned to the same frequency and programmed the same way.
Basic Repeater Communications Callsign of the System
• WD4STR: Lawrenceville, GA
Callsign Programming • • • •
MYCALL = WB4QDX RPT 1 = WD4STR C (for 2 meters) RPT 2 = not used (WD4STR G for DV Dongle support) URCALL = CQCQCQ
Results
• My call would be routed on the WD4STR, 2 meter repeater, locally. Anyone locally on 2 meters can talk to me.
Intrasite Programming (Crossband) Callsign of the System WD4STR: Lawrenceville, GA Callsign Programming MYCALL = WB4QDX RPT 1 = WD4STR C RPT 2 = WD4STR B URCALL = CQCQCQ
Alternate Programming MYCALL = WB4QDX RPT 1 = WD4STR C RPT 2 = WD4STR G URCALL = /WD4STRB
Results My call would originate on the WD4STR 2 meter repeater locally and be heard on both the WD4STR 2 meter and 440 repeaters. Users on 2 meters can talk to me. Users on 440 can hear me, but must cross band to talk to me.
Using G in RPT2 allows communication with DV Dongle users
Use a slash (/) preceding repeater callsigns in URCALL. User callsigns have no slash.
Talking to Distant Repeaters Callsign of the System WD4STR: Lawrenceville, GA Callsign Programming MYCALL = WB4QDX RPT 1 = WD4STR C RPT 2 = WD4STR G URCALL = /W4DOC C or /KI4SBAC Results My call would originate on the WD4STR 2 meter repeater locally and be heard on the distant repeater. Distant user must “one-touch” or program to talk to me.
Talking to a User in Another Area Callsign of the System WD4STR: Lawrenceville, GA Callsign Programming MYCALL = WB4QDX RPT 1 = WD4STR C RPT 2 = WD4STR G URCALL = AA4RC C or WA4YIH C Results My call would originate on the WD4STR 2 meter repeater locally and be heard by the desired user on the distant repeater. The other user must “one-touch” or program to talk back.
What’s Happening with D-STAR
Four D-STAR repeaters operational in Metro Atlanta area (Lawrenceville, Cumming, Midtown, Stone Mountain)
Georgia statewide D-STAR network planned on GPB towers
Alabama has 12 repeater D-STAR network in operation
100 repeaters in operation in US, 160 worldwide
Gateway software upgrade (G2) now shipping with new features
New features and capabilities by independent developers expand DSTAR
D-STAR Resources
Great D-STAR website - www.dstarusers.com D-STAR calculator – www.dstarinfo.com
Georgia D-STAR Yahoo Group
groups.yahoo.com/ga_dstar
General D-STAR Yahoo Group groups.yahoo.com/dstar_digital
Icom Support Forums www.icomamerica.com/en/support/forums
