Data Mismatch - Locking FAILED!
The Central Florida Geeks | HamRadio / HF Digital Modes
Recent Changes - Search:

edit SideBar

HF Digital Modes

Introduction:

details ...

Common Modes:

RTTY

Radioteletype is a telecommunications system consisting originally of two or more electromechanical teleprinters in different locations, later superseded by personal computers (PCs) running software to emulate teleprinters, connected by radio rather than a wired link.

Notes: RadioTeletype

PSK31

"Phase Shift Keying, 31 Baud" is a digital radio modulation mode, used primarily in the amateur radio field to conduct real-time keyboard-to-keyboard informal text chat between amateur radio operators.

Notes: psk31

PACTOR

PACTOR is a radio modulation mode used by amateur radio operators, marine radio stations, and radio stations in isolated areas to send and receive digital information via radio.

Notes: PACTOR

WinLink 2000

Winlink, also known as the Winlink 2000 Network, is a worldwide radio messaging system that mixes internet technology and appropriate amateur radio radio frequency (RF) technologies.

Notes: Winlink 2000 Network

Clover

details ...

Hellschreiber

The Hellschreiber or Feldhellschreiber is a facsimile-based teleprinter invented by Rudolf Hell. Compared to contemporary teleprinters that were based on typewriter systems, the Hellschreiber was much simpler and more robust, with only two moving parts.

Notes: Hellschreiber

MFSK

Multiple frequency-shift keying (MFSK) is a variation of frequency-shift keying (FSK) that uses more than two frequencies. [1] MFSK is a form of M-ary orthogonal modulation, where each symbol consists of one element from an alphabet of orthogonal waveforms. M, the size of the alphabet, is usually a power of two so that each symbol represents log2M bits.

Notes: MFSK

GTOR

details

MT-63

details ...

Throb

details ...

Olivia

Olivia MFSK is an amateur radioteletype protocol designed to work in difficult (low signal-to-noise ratio plus multipath propagation) conditions on shortwave bands.

Notes: Olivia

DominoEX

DominoEX is a family of offset incremental multi-frequency shift keyed modes with low symbol rate. A single carrier of constant amplitude is stepped between 18 tone frequencies in a constant phase manner.

Notes: MFSK or "polytone" modes

ALE

ALE (Automatic link establishment) is a protocol developed by the USA military and used mainly as an automatic signalling system between radios. It is used extensively for military and government communications worldwide and by radio amateurs.

Digital Voice and Image


Revised: David March 13, 2012, at 03:24 PM EST

Edit - History - Print - Recent Changes - Search
Page last modified on March 13, 2012, at 04:59 PM EST