Modes
Following are the various modes of communication used by HAMs
Continuous Wave (CW) : Messages are transmitted using Morse key. Morse code is a type of character encoding that transmits telegraphic information using rhythm. Morse code uses a standardized sequence of short and long elements to represent the letters, numerals, punctuation and special characters of a given message. The short and long elements can be formed by sounds, marks, or pulses, in on off keying and are commonly known as “dots” and “dashes” or “dits” and “dahs”. The speed of Morse code is measured in wpm or cpm, while fixed-length data forms of telecommunication transmission are usually measured in baud or bps.
Listen to the words Morse code transmitted in Morse code sound language using a Morse key.
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Voice : HF (High Frequency), VHF (Very High Frequency) In Amateur Radio, telephony encompasses the general use of equipment to provide voice communication over distances, on-the-air.
Listen to the ISS, QSO recorded on Aug 7, 2002 between Peggy Whitson, KC5ZTD, for NA1SS, and the European Space Center at Redu (B), ON4ESC on 145,200/145,800 MHz
An audio clip of the above QSO has been taken from The DXZone.
For the audio/video clips of below-mentioned modes, please search on The DXZone.
RTTY : Radio Teletype
Packet : Digital communication via computers
Amtor : Amateur Teleprinting over Radio
FSTV – SSTV : Fast/Slow Scan TV
Satellite communication