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RTR (A)

RTR (A). Radio Communication Basics. General Terms. Telecommunication Radio waves (or Hertzian waves ) Terrestrial radio-communication Space radio-communication Radio-determination Radio-navigation. Frequency Allocation Regions. Three Regions India in Region 3

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RTR (A)

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  1. RTR (A) Radio Communication Basics

  2. General Terms • Telecommunication • Radio waves (or Hertzian waves) • Terrestrial radio-communication • Space radio-communication • Radio-determination • Radio-navigation

  3. Frequency Allocation Regions • Three Regions • India in Region 3 • Region 3 includes (from the west) Iran, Iraq, Afghanistan, Pakistan, India, China, Nepal, Bhutan, Bangladesh, Japan, Korea (north & south) the rest of south-east Asia, Australia, New Zealand, and all of Oceania south of the Equator

  4. Designation of Emissions 100HA1AAN Nature of multiplexing (1 letter) Bandwidth (4 letters) Basic characteristics (3 letters) Signal details (1 letter)

  5. Emission designation: The first four symbols • Numbers • Before 100H • After 6M25 • Letter • H – Hertz • K – Kilohertz • M – Megahertz

  6. Emission desig – 5th symbol Type of modulation of main carrier • N - Unmodulated • A - Double sideband (DSB) • H - Single sideband (SSB) • J - Single sideband (suppressed) • F - Frequency modulated • G - Phase modulated • P - Unmodulated pulse sequence • K - Amplitude-modulated (AM) pulse sequence

  7. Emission desig – 6th symbol Nature of signal modulating the main carrier • 0 - No modulation • 1 - Single channel without sub-carrier • 2 - Single channel with sub-carrier • 3 - Single channel containing analogue information • 7 - Two or more channels – digitised information • 8 - Two or more channels – analogue information • 9 - Composite system • X - Cases not covered

  8. Emission desig – 7th symbol Type of information to be transmitted • N - No information transmitted • A - Telegraphy (for aural reception) • B - Telegraphy (for automatic reception) • C - Facsimile • D - Data transmission, telemetry, telecommand • E - Telephony (including sound broadcasting) • F - Television (video) • W - Combination of the above • X - Cases not covered

  9. Emission desig – 8th symbol Details of signals • From A-N (not including I & O), W and X • G - Broadcasting quality sound (mono) • H - Broadcasting quality sound (stereo/quadro) • J - Commercial quality sound • M - Monochrome (video) • N - Colour (video) • W - Combination of A-N • X - Cases not otherwise covered

  10. Emission desig – 9th symbol Nature of Multiplexing • N - None • C - Code division multiplexing (CDMA) • F - Frequency division multiplexing (FDMA) • T - Time division multiplexing (TDMA) • W - Combination of F & T multiplexing • X - Cases not covered

  11. Emission desig – Example 1 8K00A3EGN • Bandwidth 8.00 KHz • Double sideband • Single channel (analogue) • Telephony (incl. sound broadcasting) • Broadcasting quality (mono) • No multiplexing AM Radio

  12. Emission desig – Example 2 180KF3EGN • Bandwidth 180 KHz • Frequency modulated • Single channel (analogue) • Telephony (incl. sound broadcasting) • Broadcasting quality (mono) • No multiplexing FM Radio

  13. Emission desig – Example 3 20K9A9WWF • Bandwidth 20.94 KHz • Double sideband • Composite modulation (AM & FM) • Combination of telegraphy/telephony/data • Combination of signals • FDMA CVOR

  14. Frequency Bands • VLF Very Low Frequency 3—30 KHz • LF Low Frequency 30—300 KHz • MF Medium Frequency 300—3000 KHz • HF High Frequency 3—30 MHz • VHF Very High Frequency 30—300 MHz • UHF Ultra High Frequency 300—3000 MHz • SHF Super High Frequency 3—30 GHz • EHF Extremely High Frequency 30—300 GHz • Not designated 300—3000 GHz

  15. Frequency Allocation: Aviation • VLF Omega 10—14 KHz • LF Decca 70—130 KHz • LF LORAN C 100 KHz • LF/ MF NDB 200—450 KHz • LF/ MF ADF 200—1750 KHz • HF HF Radio 2—22 MHz • HF Marker 75 MHz • VHF ILS (Localiser) 108—112 MHz • VHF VOR 108—118 MHz

  16. Frequency Allocation: Aviation • VHF VHF communication 118—136 MHz • UHF ILS (Glideslope) 320—340 MHz • UHF DME 960—1215 MHz • UHF SSR 1030 & 1090 MHz • SHF Radio Altimeter 4.2—4.4 GHz • SHF Weather Radar (C-band) 5.5 GHz • SHF Doppler (X-band) 8.8 GHz • SHF Weather Radar (X-band) 9.4 GHz • SHF Doppler (K-band) 13.3 GHz

  17. Distress Frequency Allocation • MF 500 KHz 405—535 KHz • HF 2182 KHz 1605—4000 KHz • HF 4125 KHz 4000—27,500 KHz • HF 8364 KHz 4000—27,500 KHz • VHF 121.5 MHz 118—136 MHz • V/UHF 243 MHz 235—328.6 MHz • UHF 406—406.1 MHz EPIRB (Satellite)

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