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Technician License Course Chapter 4 Communicating with other hams

Technician License Course Chapter 4 Communicating with other hams. Special Modes and Techniques. Awards. DXCC Contacting 100 different countries and/or entities WAS Contacting 50 states VUCC Contacting 100 grid squares on VHF/UHF. Special Events.

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Technician License Course Chapter 4 Communicating with other hams

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  1. Technician License CourseChapter 4Communicating with other hams Special Modes and Techniques

  2. Awards • DXCC • Contacting 100 different countries and/or entities • WAS • Contacting 50 states • VUCC • Contacting 100 grid squares on VHF/UHF

  3. Special Events • Special Event stations are set up to commemorate some significant local event • Callsign good for 15 days • Usually stations are demonstration stations set up for public display • Commemorative certificates are awarded for contacting the stations

  4. Contests • Field Day • Communicate is the worst of conditions • Sweep Stakes • QSO Parties • Make contacts with as many locations as possibel • CQ DX Contest • Make as many long distance contacts as possible • Contest Corral

  5. Amateur Satellites • OSCAR • Orbiting Satellites Carrying Amateur Radio • Modes • FM • Analog (SSB and CW) • Digital • International Space Station

  6. What satellite contacts sound like • FM contact • SSB contact • ISS contact

  7. Digital Techniques • Radio Teletype (RTTY) • Single letters sent as they are typed • AMTOR and PACTOR • Small grouping of letters sent with error correction • Packet and Packet Networks • Groups (packets) of collected data sent with error correction and automatic forwarding • PSK31 • Different modulation technique

  8. What Digital sounds like • RTTY • AMTOR • PACTOR • PACKET • PSK31

  9. Digital Mode Modulation Techniques • Digital means two states: ON and OFF • Digital code is a sequence of ON and OFF states or 1’s and 0’s • The letter “A” is 0100 0001 (65 decimal) • When two audio tones are used to represent the ON and OFF states it is called Frequency Shift Keying (FSK) • When changing phase states are used to represent ON and OFF states it is calls Phase Shift Keying (PSK)

  10. Communicating Digitally • Keyboard-to-keyboard • Live exchange using computer keyboards • Digipeaters extend range • Message store and forward using networks • Packet networks and bulletin boards • Digipeaters make up the backbone of packet networks • Internet-Radio connections • WinLink • Radio connections are Internet Gateways

  11. APRS • Automatic Position Reporting System (APRS) • Packet based Global Positioning System (GPS) position reporting • Uses a packet-like digipeater system to create an APRS network (also Internet connected)

  12. Video Slow Scan TV (SSTV) Sending snap-shot pictures Amateur TV (ATV) Similar to commercial TV imagery What SSTV sounds like: Other Special Modes

  13. Other Special Modes • Meteor Scatter • Reflecting radio signals off of the ionized trail left by meteors • Moonbounce • Reflecting radio signals off the surface of the moon

  14. Radio Control (RC) Telecommand 50 MHz band Other Special Modes

  15. Review Questions • T5D13 • T6A11, T6C01, 04, 06, 07 • T7A05 through 08, 10 through 12 • T7B01 through 11

  16. Next Time • Licensing Regulations • Read 5-1 through 5-20

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