HF Modes List
From The RadioReference Wiki
This is a list of modes as reported on the DigiFaq 5.3, along with a few that weren't known almost 20 years ago. The systems are, by no means, a complete list of every system used on HF. There are undoubtedly systems that simply haven't been discovered or identified yet.
Each article contains a description of the signal from the original document, a comment on when traffic was last noted using this mode (from log searches on the UDXF Yahoo group, as well as the Numbers and Oddities website), and, if known, decoders (software that is known to decode the mode), an audio sample and/or waveform of the signal and lastly, links to external sources of data such as the go2monitor and Wavecom online help, the Rivet wiki along with other relevant links.
For those that still have the Universal / Info-Tech / DES terminal units, we have a link in the Appendix to a PDF file that lists what modes they copy and other operational characteristics. Please refer to that to see if the mode you are interested in is copied by one of these units.
Note that the notation 'Hoka 300-32(P)' refers to both the 300-32 standalone package as well as the one that allows control via the popular (P)erseus SDR.
For links to the software, please see the Utility Monitoring Website software page, the link for which is in the Appendix.
It should be noted that utilities (and numbers stations) have sometimes used digital modes used in the Amateur Radio Service such as Olivia, PSK31 or MT63. These modes, along with many others, are defined in the Digital Amateur Radio article on this wiki.
To view the page, simply click on the desired topic below
| Mode Name | Synonym | Notes |
|---|---|---|
| ALE | ALE 2G | |
| MIL-STD-188-141A | ||
| ANNEX 10 | ICAO SELCALL | |
| ARQ-E | ARQ-1000D | |
| ARQ-E3 | ||
| ARQ-M2 | ARQ-28 | |
| TDM | ||
| TDM-2 | ||
| TDM-242 | ||
| TDM-342 | ||
| ARQ-M4 | ARQ-56 | |
| TDM-4 | ||
| TDM-242 | ||
| TDM-342 | ||
| ARQ-N | ||
| ARQ6-70 | ||
| ARQ6-90 | ||
| ARQ6-98 | ||
| ARS-GUARD | SAUD-NAT | |
| AUTOSPEC | AUTOSPEC MK 1 | |
| AUTOSPECBAUER | ||
| BAUER | ||
| BAUDOT | ITA-2 | |
| RTTY | ||
| CCIR493-4 | ||
| CHINESE 4 PLUS 4 | ||
| CIS Modes | ||
| CLOVER | Q-CLOVER | |
| QUAD-CLOVER | ||
| 8 TONE CLOVER | ||
| CODAN | ||
| COQUELET | COQ-8 | |
| COQ-12 | ||
| COQUELET 8 V 2 | ||
| DGPS | ||
| DPRK ARQ | ||
| DUP-ARQ | 128-ARTRAC | |
| ARTRAC | ||
| DUP-ARQ-2 | ARTRAC-II | |
| DUP-FEC | DUP-FEC-2 | Name used in Wavecom doc |
| FAX | ||
| FEC-A | FEC-100 | |
| FSK100 | POL-FSK | |
| Globe Wireless Modes | Org used several proprietary modes | |
| GMDSS/DSC | ||
| G-TOR | ||
| HARCO-39 | HARRIS 39 TONE | |
| HC-ARQ | ||
| HFDL | HF ACARS | |
| HNG-FEC | ||
| IRA-ARQ | BULG-ASCII | |
| LINK11 | ALLIGATOR | |
| TADIL-A | ||
| MIL STD 188 110A | ANDVT | |
| NATO 75/100 | BEAVER? | |
| LINK4? | ||
| CRATT | ||
| RATT | ||
| PACKET | ||
| PACTOR | Several variants | |
| PICCOLO | ||
| POL-ARQ | ||
| QPSK1500 | Mode used by Japanese Slot Machine | |
| RAC-ARQ | MEROD | Not really a synonym - see article |
| RACAL-ARQ | ||
| RDFT | Mode used by HM-01 | |
| ROU-FEC | RUM-FEC | |
| RS-ARQ | ALIS | Not really a synonym - see article |
| MERLIN | ||
| SI-ARQ | ARQ-S | |
| ARQ-1000S | ||
| SI-FEC | FEC-S | |
| FEC 1000 SIMPLEX | ||
| FEC-1000S | ||
| SITOR-A | AMTOR MODE A | |
| ARQ | ||
| SITOR-ARQ | ||
| TOR | ||
| SITOR-B | AMTOR MODE B | |
| FEC | ||
| NAVTEX | A broadcast mode built on SITOR-B - see article | |
| SITOR-FEC | ||
| SPREAD | AUTOSPEC MK II | |
| SPREAD-11 | ||
| SPREAD-21 | ||
| SPREAD-51 | ||
| STANAG | Several variants - 4285 and 4481 are common | |
| SWED-ARQ | ARQ-SWE | |
| TT2300B | TPLEX | |
| TRA-2300 | ||
| TT2300-ARQ | ||
| TWINPLEX | TWINPLEX-SITOR | |
| F7B4 | ||
| F7BNN | ||
| VOICE FREQUENCY TELEGRAPHY (VFT) |
- Return to DXing Digital Utilities
- Return to A Few Words on Receivers
- Return to Making the Connection to the PC
- Return to Decoders
- Go to Testing Your New Setup
- Go to the Appendix