The following is a list of the modes of communication used by amateur radio operators. An amateur radio operator An amateur radio operator is an individual who has been assigned an amateur radio license by a governmental regulatory authority. ...

Analog

• Amplitude Modulation (AM)
• Double Sideband Suppressed Carrier (DSB-SC)
• Independent Sideband (ISB)
• Single Sideband (SSB)
• Amplitude Modulation Equivalent (AME)

• Frequency Modulation (FM)
• Phase Modulation (PM)

[[Amplitude modulation]] (AM) is a technique used in electronic communication, most commonly for transmitting information via a carrier wave wirelessly. ... In radio communications, a sideband is a band of frequencies higher than or lower than the carrier frequency, containing energy as a result of the modulation process. ... Independent sideband (ISB) is an AM single sideband mode which is used with some AM radio transmissions. ... Single-sideband modulation (SSB) is a refinement of the technique of amplitude modulation designed to be more efficient in its use of electrical power and bandwidth. ... Frequency modulation (FM) is a form of modulation which represents information as variations in the instantaneous frequency of a carrier wave. ... Phase modulation (PM) is a form of modulation which represents information as variations in the instantaneous phase of a carrier wave. ...

Image Modes

• Amateur Television (ATV)
• Slow Scan Television (SSTV)
• Facsimile

Amateur television (ATV) is the hobby of transporting broadcast-quality video and audio over radio waves allocated for amateur radio using the broadcast standards of NTSC in North America and Japan, and PAL or SECAM in Europe and elsewhere, using the full refresh rates of those standards. ... Slow-scan television (SSTV) is used by amateur radio operators, to transmit and receive static pictures in monochrome (black & white) or colour. ... A Samsung fax machine. ...

Digital

Most amateur digital modes are transmitted by inserting audio into the microphone input of a radio and using an analog scheme, such as amplitude modulation (AM), frequency modulation (FM), or single-sideband modulation (SSB). [[Amplitude modulation]] (AM) is a technique used in electronic communication, most commonly for transmitting information via a carrier wave wirelessly. ... Frequency modulation (FM) is a form of modulation which represents information as variations in the instantaneous frequency of a carrier wave. ... Single-sideband modulation (SSB) is a refinement of the technique of amplitude modulation designed to be more efficient in its use of electrical power and bandwidth. ...

• AMateur Teleprinting Over Radio (AMTOR)
• D-Star
• Echolink
• Continuous Wave (CW)
• Multi Tone 63 (MT63)
• Packet Radio (AX25)

• Automatic Position Reporting System (APRS)

• PACTOR
• Phase Shift Keying (31.25 Hz bandwidth) (PSK31)
• Spread spectrum
• Simplex Teletype Over Radio (SITOR)
• Radio Teletype (RTTY)

AMTOR is a specialised form of RTTY. The term is an acronym for AMateur Teleprinting Over Radio and is derived from the commercial SITOR system (Simplex Telex Over radio) developed primarily for Maritime use in the 1970s. ... // D-Star information Digital Smart Technology for Amateur Radio D-Star Radio is a digital HAM radio. ... A program designed by Jonathan Taylor, K1RFD to allow amateur radio stations to communicate with one another over the Internet, using voice-over-IP (VoIP) technology. ... 1922 Chart of the Morse Code Letters and Numerals Morse code is a method for transmitting information, using standardized sequences of short and long marks or pulses — commonly known as dots and dashes — for the letters, numerals, punctuation and special characters of a message. ... // How it works By encoding the data to transmit (what you type on the keyboard) in a complex way, using 64 different modulated tones, the MT63 developer Pawel Jalocha SP9VRC has been able to include a large amount of extra data in the transmission of each character, so that the... Packet radio is a form of digital data transmission used in amateur radio to construct wireless computer networks. ... Automatic Position Reporting System (APRS) is an amateur radio-based automatic position reporting system for tracking and digital communications, and was developed by Bob Bruninga, callsign WB4APR, at the United States Naval Academy. ... The introduction to this article provides insufficient context for those unfamiliar with the subject matter. ... Several adjacent PSK31 signals, at least six, taken from the waterfall display of DigiPan. ... Spread-spectrum telecommunications is a technique in which a signal is transmitted in a bandwidth considerably greater than the frequency content of the original information. ... SITOR (simplex teletype over radio) is a transmission mode used to transmit textual messages akin to regular radioteletype (RTTY), but implements simple error correction. ... Radioteletype (RTTY) is a telecommunications system consisting of two teleprinters linked by a radio link. ...

Modes by Activity

The following 'modes' use no one specific modulation scheme but rather are classified by the activity of the communication.

• Earth-Moon-Earth (EME)
• Internet Radio Linking Project (IRLP)
• Low Transmitter Power (QRP)
• Satellite (OSCAR)

Earth-Moon-Earth is a radio communication which relies on the propagation of radio waves from an earth based transmitter directed via reflection from the surface of the moon back to an earth based receiver. ... The Internet Radio Linking Project is a project within general amateur radio. ... In amateur radio, QRP operation means transmitting at reduced power levels. ... OSCAR is an acronym for Orbital Satellite Carrying Amateur Radio. ...

Sources

http://www.ac6v.com/opmodes.htm