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Digital Voice and Data

Digital Voice and Data. ICOM D-Star The Cutting Edge? October 15, 2007. The PAPA System. 1. Contents. Introduction to PAPA About D-Star Key Benefits Stand alone system operation Gateway (“Linked”) system operation RF configuration of repeaters Additional Benefits Resources

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Digital Voice and Data

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  1. Digital Voice and Data ICOM D-Star The Cutting Edge? October 15, 2007

  2. The PAPA System 1

  3. Contents • Introduction to PAPA • About D-Star • Key Benefits • Stand alone system operation • Gateway (“Linked”) system operation • RF configuration of repeaters • Additional Benefits • Resources • Conclusion

  4. What Is D-Star • ICOM’s implementation of JARL open standard for UHF/VHF digital voice and data communications • Gaussian Minimum Shift Keying (GMSK) with forward error correction • Consists of radios, repeaters, and (optional) gateway hardware and software • 2 Meter, 440 MHz and 1.2 GHz 3

  5. Key Benefits • Digital quality voice communication simplex or via repeater • Very easy setup of repeater/controller • Coverage on 440 equal to or better than analog • Alphanumeric call sign ID, call sign squelch (can be bypassed for emergency traffic), and code squelch • Wireless internet access via router (part 97 presumably applies to content) • Nationwide routed call sign calling via Gateway • Data Transmission • Low-Speed Data on UHFand VHF • ISDN rate data transmission simplex or via repeater (1.2 GHz only, half duplex) 4

  6. Call Sign Squelch (DSQL) • Configuration option on your radio • If enabled, squelch opens only when your call sign is received • Call sign squelch is bypassed if calling station operates in EMR mode 5

  7. Code Squelch (CSQL) • Configuration option on your radio • Squelch opens only when a preset code is received • Programmable codes: 0-99 • Code squelch is bypassed if calling station operates in EMR mode 6

  8. D-STAR Repeater System Stand Alone 4 Box System Shown* Module“A” * D-STAR System can be Controller Plus any 2M, 440, 1.2 GHz DV or 1.2 GHz DD Modules Note 1 Note 1 Note 1 Note 1 Module “C” Module “B” Note 1: Analog RF Components (Filters, Cavities, Circulators, PreAmps, etc 7

  9. Repeater System Use -Radio Setup (Stand Alone Sys) Repeater Module ID “A”, “B”, “C” must be in the 8th Character position ^ = SPACE • Use of Any One Band Box (Same Band) by itself • To make a call from the 440 MHz “B” Repeater module thru the 445MHz "B" repeater module. • Frequency: 446.730(-) (Note: Repeater is not expected to recognize N6SIX) • MYCALL: W6SIX • URCALL: CQCQCQ (General Inquiry to Everyone) or • (Specific Station Call Sign e.g. W1AWX) • RPT1: N6SIX^^B • RPT2: NOT USE • Cross Banding in Addition to Same Band (N6SIX System) • To make a call from the 440 MHz “B” Repeater module thru the 144.52 MHz “A" repeater module. • Frequency: 446.730(-) • MYCALL: W6SIX (Note: Repeater is not expected to recognize N6SIX) • URCALL: CQCQCQ (General Inquiry to Everyone) or • (Specific Station Call Sign e.g. W1AWX) • RPT1: N6SIX^^B • RPT2: N6SIX^^A 8

  10. GPS Operation 9

  11. Low-Speed Data IC-91AD ID-800H IC-2820 IC-2820 • Data, PC Programming Cables • IC-91AD & IC-2820 • Same Cable used for Both Radios • ID-800H • PC Programming – OPC-478 or OPC-478U • Data – OPC-1529R • Any Terminal Program should work • ID-91AD Software includes Terminal Prog • D-CHAT by NJ6N (Quite “User-Friendly”) 10

  12. Internet Connectivity Graphic courtesy of Texas Interconnect Team RP2 10.x.x.100 10.x.x.101 Router Hub ID-1 Internet 10.x.x.102 11

  13. Linked Repeater Operation 12

  14. Gateway Operation 13

  15. D-STAR Repeater System 4 Box System with GATEWAY Shown* Note 1 Note 1 Note 1 Note 1 Module“A” * D-STAR System can be Controller , GateWay PC Plus any 2M, 440, 1.2 GHz DV or 1.2 GHz DD Modules Module “C” Module “B” Note 1: Analog RF Components (Filters, Cavities, Circulators, PreAmps, etc 14

  16. Repeater System Use -Radio Setup (Gateway System) Repeater Module ID “A”, “B”, “C” must be in the 8th Character position ^ = SPACE Same as Stand Alone except ….. • Cross Banding in Addition to Same Band (N6SIX System) • To make a call from the 440 MHz “B” Repeater module thru the 144.52 MHz “A" repeater module. • Frequency: 446.730(-) • MYCALL: W6SIX (Note: Repeater is not expected to recognize N6SIX) • URCALL: /VK8SDFB (General Inquiry to Everyone on VK8SDF “B” Repeater • Module; “/” is same as CQ) • RPT1: N6SIX^^B • RPT2: N6SIX^^G 15

  17. RF Configuration (D-10) 16

  18. RF Configuration (D-1) 17

  19. 19

  20. Additional Benefits • Extensive support via forums and user groups • Radios work in both digital and analog modes and dual banders are available • 53 repeaters now on Gateway network • Probably between 80-100 repeaters on the air • Lower bandwidth requirements (6.25 KHz vs. 10 KHz) • Digital messaging in Digital Voice mode (i.e., works on 2 M, 440 or 1.2 GHz) • Location services (e.g., D-PRS/APRS) • IP compatible, open JARL standard 20

  21. Resources • http://www.icomamerica.com/amateur/dstar/default.asp Icom D-Star Home • illinoisdigitalham (Yahoo Group, digital radio in general, including D-Star) • http://www.hamradio-dv.org/ Digital Radio Audio Comparisons • http://www.icomamerica.com/support/forums/ D-Star Forums (ICOM hosted) • http://www.arrl-al.org/D-STAR_class_2.pdf DSTAR Radios • http://www.icomamerica.com/downloads/manuals.asp Icomamerica manuals downloads (ICOM hosted) • http://www.ccdastronomy.org/D-Star (this presentation, in the “about D-Star” section) 21

  22. Radios Now Available • ID-1 1.2 GHz Mobile (10 Watts, High Speed Digital Data, Digital Voice, Analog Voice) -- $979 • ID-800H 2M/440 Mobile (55 Watt VHF/50 Watt UHF Digital Voice and Data, Analog Voice -- $610 • IC-2200H 2M Mobile (65 Watt VHF Digital Voice and Data -- $350 with optional digital module • IC-V82/U82 2M/440 HT (Digital Voice and Data) -- $390 with optional digital module • IC-91AD 2M/440 HT (Digital Voice and Data, Analog Voice) -- $628 with digital module • IC-2820 Dual Band Mobile (Analog and Digital) -- approx. $950 with optional DV module • Home brew 2-meter demonstrated at Dayton this year 22

  23. Requirements • Filters required for repeater in dense RF environments • Internet access required for Gateway • Static IP required, DSL bandwidth • Gateway software runs only on Linux (Fedora Core 4 is recommended) • Repeaters must have unique call signs • Gateway operation requires certification • Take and Pass (Complete) ICOM Administrator Course • Familiarity with basic Linux terminal commands is very helpful for Gateway configuration 23

  24. Challenges • Getting coordinated pairs on 440 (may be able to allocate an existing pair) • ICOM controller lacks many features • Linkcom will develop D-Star capable controller • ICOM proprietary components • Codec (has been replicated) • Gateway (opendstar.org to develop open source version) • 10 GHz link system is not available in US 24

  25. The Cutting Edge? • Not the only digital game in town, but it works out of the box • Excellent performance on 440 • ISDN rate internet access via ID-1 • Transparent call routing throughout the D-Star Network • Significant experimentation and innovation is occurring (e.g., home brew radios, openstar.org) 25

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