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Foundation Course

Foundation Course. What is Amateur (Ham ) Radio ??. Foundation Course. What is Amateur (Ham ) Radio ??. What is amateur radio.

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Foundation Course

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  1. Foundation Course What is Amateur (Ham ) Radio ??

  2. Foundation Course What is Amateur (Ham ) Radio ??

  3. What is amateur radio It’s a hobby, a technical hobby with a large number of different activities within it. It contains a certain element of self-training and experimentation, it is non commercial – a hobby !! Why become an amateur • To experiment with radio’s • To talk to people around the world and make friends • Get involved in a niche area such as RAYNET • Get a better understanding of electronics/computers • Have FUN !!!!!!! The Foundation Licence is the UK entry level which will enable you to start transmitting on the air .

  4. Bands: HF, VHF, UHF, Microwaves Modes: Voice, SSTV, RTTY, Data, FSTV, Morse Modulation – SSB, FM, AM, CW, FSK, PSK Focus Groups – satellites, moon bounce, clubs, rallies etc. Others - RSGB, Rallies, QSO Bureau, contest,

  5. The frequency allocation table for the VHF band is shown above. It indicates that we share the spectrum with other users and we must ensure that we do not interfere with their frequencies. Reproduced from Radio Communications Foundation booklet.

  6. Radio Spectrum VLF = Very Low Frequency LF = Low Frequency MF = Medium frequency VHF = Very High Frequency UHF = Ultra High Frequency SHF = Super High Frequency EHF = Extra High Frequency

  7. As the Frequency increases its wavelength shrinks Antenna sizes are proportional to wavelength Therefore higher frequencies have smaller antennas A copy of conversation chart is supplied in the exam Reproduced from Radio Communications Foundation booklet

  8. Very low frequency or VLF refers to radio frequencies (RF) in the range of 3 khzto 30 khz and wavelengths from 10 to 100 kilometres - submarines HF -The dominant means of long distance communication in this band is skywave(skip) propagation, in which radio waves directed at an angle into the sky reflect back to Earth from layers of ionized atoms in the ionosphere. By this method HF radio waves can travel beyond the horizon, around the curve of the Earth, and can be received at intercontinental distances. However, suitability of this portion of the spectrum for such communication varies greatly with a complex combination of factors reproduced from Wikipedia

  9. Very high frequency (VHF) is the ITU-designated range ofradio frequency electromagnetic waves  from  30Mhz to 300 Mhz, reproduced from Wikipedia

  10. The RSGB (Radio Society of Great Britain) acts on behalf of amateurs lobbying for frequencies. Internationally the body which tries to co-ordinate the band plan is IARU (International Amateur Radio Union) RSGB Publication 2013

  11. Different terminology for band description HF: 7MHZ = 40m 21MHZ = 15m 29MHZ = 10m VHF: 50MHZ = 6m 145MHZ = 2m UHF: 430MHZ = 70cms Note – as frequencies rise wavelength decrease.

  12. Revision Questions

  13. What does the following stand for: HF High Frequency VHF Very High Frequency UHF Ultra High Frequency

  14. Modulation: What is ?? SSB Single Side Band FM Frequency modulation AM Amplitude modulation CW Carrier wave

  15. What is the frequency range of: HF 3 to 30 mhz VHF 30 – 300 mhz

  16. Thurrock Training Team

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