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D Star Digital Data (DD)

D Star Digital Data (DD). Buddy Morgan WB4OMG Trustee KJ4ACN D Star Repeater, Lakeland, FL beamar@aol.com. D Star Digital Data. An additional mode only available on an ID-1 Allows any Ethernet formatted Data to be communicated

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D Star Digital Data (DD)

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  1. D Star Digital Data (DD) Buddy Morgan WB4OMG Trustee KJ4ACN D Star Repeater, Lakeland, FLbeamar@aol.com

  2. D Star Digital Data • An additional mode only available on an ID-1 • Allows any Ethernet formatted Data to be communicated • Wireless Access Point: Greater range, but slower speed than Part 15 devices • 128Kbps (130 KHz bandwidth) • Simplex, Forward Error Correction only, Latency problems

  3. ID-1 • First Unique Radio manufactured for Amateur Service, since 1957 • 23 cm band (1296 MHz or 1.2 GHz) operation, only • FM Voice • Digital Voice • Slow Speed Data • 128 Kbps Data (Ethernet Port)

  4. My Points: • The RF aspects of successful 23 cm operation • Digital Voice on 23 cm • Digital Data Simplex • Internet access using two ID-1s • Internet access using a DD "repeater" • Future of D Star Digital Data (DD)

  5. The RF aspects of successful 23 cm operation:Propagation • Obstructions are more of a problem • 23 cm signals can sneak through holes that the lower bands can’t • 23 cm for H/T’s is about as good as 2M but not as good as 70 cm • 23 cm doesn’t work as well for mobile to mobile as 70 cm or 2M • Little impulse noise or IMD on 23 cm

  6. 23 cm Propagation (Continued) • Base Station and Repeater Antennas should have a clear view of the horizon • Repeater or base station DV or FM operation can be just as good as 2M or 70 cm • DD is at a 13 db disadvantage to DV due to the increased Bandwidth. Seven Bars of Signal on the ID-1 “software” S Meter for DD • Nobody has ever installed a preamp or Power Amp on an ID-1 for use in DD mode

  7. Transmission line • Do not use RG 58 or RG 214 (RG 8) • LMR 195 at a minimum, for mobile installations. Use larger cable, if possible • Belden 8214 for very short flexible non-repeater jumper cables • LMR 400 type for longer jumpers or repeater jumpers • 1 ¼” Heliax vs ½” Heliax

  8. Connectors • Do not use UHF connectors! • Avoid BNC connectors • Always try to use N, SMA, TNC or Mini UHF connectors • Purchase the correct connector for your cable • Purchase name brand connectors and cable only • Do not buy “bargain” connectors or cable • Installing Connectors requires some Skill

  9. Mobile Antennas • Comet SBB 97 and Diamond NR 2000 Triband antennas use an N mount • Comet SB 123 is an N mount monobander • Diamond NR 124 NMO monobander is the best mobile antenna available • 6 GHz rated NMO Mounts PCTEL-Maxrad removable center pin with LMR 195 cable • PCTEL-Maxrad 3 GHz Magnetic Mount with LMR 195 cable

  10. Base Station Omni Antennas • Diamond X-6000 Tribander and F 1230 Monobander • Comet GP 95 and GP 98 Tribander • Make your own!

  11. Yaghis • M2, Directive Systems or SHF • No Japanese Yaghis • Make your own

  12. Repeater AntennasHustler Spirit 12db

  13. Test Equipment • Bird 43 Wattmeter Slugs are available • Most “Service Monitors” only go to 1000 MHz

  14. 23 cm Digital Voice • DV on 23 cm is no different than 70 cm or 2M • An ID-1 will do everything that the 70 cm and 2M radios will do • 1294.3 MHz has become the accepted DV Simplex frequency

  15. Digital Data SimplexAKA Computer Networkingusing the ID-1 as a NIC card for Peer to Peer Computer Networking

  16. Peer to Peer Computer Networking • No File Server • No hub or Switch • No internet connection • The two computers can see each others hard drives and can share files

  17. Peer to Peer Networking (Wired)

  18. The ID-1, in DD Mode, can be thought of as a 128 Kbps, 10 watt Wireless Network Card that can be connected to an external Antenna

  19. Frequencies • 1240 to 1260 MHz • Most antennas will have high SWR below 1250 • 500 KHz channel spacing • 1259.5 Shared non protected DD Simplex

  20. Peer to Peer Computer Networking using ID-1s • Set up your computers for file sharing • Use a fixed IP address • Connect the computers using a crossover cable • Get the computers find each other • Map Network Drives, Mount Volumes, etc

  21. Peer to Peer Computer Networking with an ID-1 (continued) • Put the ID-1s in DD Simplex mode • Make sure they are on the same frequency and that Transmit Inhibit is not enabled • Use Callsign routing • Connect the computers to the ID-1s using Ethernet cables • Start the computers

  22. Internet Access using Two ID-1s • Connect the Base Station ID-1 to your cable or DSL modem, using the Ethernet cable • Connect the mobile ID-1 to a computer, using the Ethernet cable • Set up your mobile computer for DHCP • Make sure both ID-1s are set up on the same data simplex frequency and that Transmit Inhibit is turned off

  23. Internet access using a DD “Repeater" • ICOM ID-RP2D Data Module • Repeater must be on the Gateway • Set up your computer for Dynamic IP

  24. ID-1 Callsign Setup on KJ4ACN for Internet Access UR = KJ4ACN RPT1 = KJ4ACN A RPT2 = KJ4ACN G

  25. ID-1 Setup for Internet Access using a Repeater • Set the ID-1 to the Repeater Data Frequency • Set the mode to RPS • Transmit Inhibit should be turned off • Connect your computer to the Ethernet Port

  26. The Future of DD • The World has changed • The Communications needs of the Relief and Public Safety Agencies have Changed and become more Sophisticated • Amateur Radio has not kept up with technology • Hams can provide little more to the Served Agencies than we could in 1970

  27. www.14567.orgEmergency Minnesota Amateur Radio Disaster Data Network

  28. Basic D Star 3:45 pm @ Orlando HamcationBuddy Morgan WB4OMGbeamar@aol.com

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