1 / 26

Digital Voice and Data

Digital Voice and Data. ICOM D-Star The Cutting Edge? San Diego Six Shooters August 20, 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

nay
Download Presentation

Digital Voice and Data

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Digital Voice and Data ICOM D-Star The Cutting Edge? San Diego Six Shooters August 20, 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

More Related