HF Modes Currently Active
From The RadioReference Wiki
These modes have been reported in various places over the couple of years. Keep in mind that although a particular mode can be decoded, there are several that are encrypted, and therefore unreadable. One can use analysis tools such as ACF analysis to determine this, but we may never know what such signals are actually saying.
We have pages set up with just waterfalls (useful for quick searches) here;
The PACTOR references are shown in bold will redirect to the HF Digital Amateur Radio article on this wiki to link to articles that describe the protocols in more detail. PACTOR1 through 3 have been known to be used in the amateur radio service, as well as in the maritime service, as noted. ALE has also been known to be used in the amateur service.
'Last Seen' references are the last time this mode was seen in the UDXF logs.
Active Modes
Mode or Description | Synonym | Notes | Waterfall Page |
---|---|---|---|
ARINC 635 | HFDL | HFDL Waterfall | |
HF ACARS | |||
HF DATALINK | |||
BAUDOT | ITA-2 | misnomer; ITA2 is coding scheme. | Baudot Waterfalls |
RTTY | |||
CCIR493-4 Selcall | CODAN 8580 | Misnomer; Radio Modem Name | CCIR493 Waterfall |
CW | Morse | heavily used by Russ Mil (AF, etc.) | CW Waterfall |
FAX | FAX Waterfall | ||
FSK100 | POL-FSK | Uses 63bd/125bd; BPSK/QPSK too; Enigma P03 | FSK100 Waterfalls |
AK10 | per Hoka | ||
GMDSS/DSC | Maritime Selcall | GMDSS DSC Waterfall | |
MIL-STD-188-110A | encrypted | Waterfall de DX Asia | |
MIL-STD-188-110B | |||
MIL-STD-188-141A (ALE) | 2G ALE | wide use by NGO,Military some ham | ALE 2G Waterfall |
MIL-STD-188-203-1A | ALLIGATOR | encrypted | Link11 Waterfalls |
Link-11 | |||
TADIL-A | |||
M823/SC104 DGPS | DGPS | DGPS Waterfalls | |
NAVTEX | A broadcast mode built on SITOR-B | NAVTEX Waterfall | |
PACTOR IV | used in the maritime svc - often encrypted | ||
RDFT | Mode used by HM-01;encrypted | HM01 RDFT Waterfall | |
SITOR-A | AMTOR MODE A | some maritime, Egyptian use | SITOR-A Waterfalls |
ARQ | |||
SITOR-ARQ | |||
TOR | |||
SITOR-B | AMTOR MODE B | SITOR-B Waterfall | |
FEC | |||
SITOR-FEC | |||
STANAG4197 | ANDVT | encrypted | ANDVT Waterfall |
STANAG4285 | encrypted | STANAG 4285 Waterfall | |
STANAG4481 | CRATT | encrypted | STANAG 4481 Waterfalls |
LINK-4 | |||
NATO-75 | |||
RATT |
Sporadically Active Modes
These modes have been reported occasionally over several months. Some may have been just tests; whether they'll show up in the future is anyone's guess.
Mode or Description | Synonym | Notes | Waterfall Page |
---|---|---|---|
Australian Forces 50bd/600bd | encrypted | ||
Chinese 4 plus 4 Modem | encrypted | ||
CODAN | Used by the Egyptians | CODAN Chirp Waterfall | |
Japanese Mil 8-FSK | encrypted | Jap 8Tone Waterfall | |
Japanese Slot Machine | Mode is QPSK1500; encrypted | QPSK1500 Waterfall | |
KEGURI | DPRK 600 ARQ | DPRK 600 Waterfall | |
DPRK 1200 | DPRK 1200 Waterfall | ||
MIL-STD-188-110 hybrid | |||
MIL-STD-188-110C | |||
PACTOR-II FEC | via I5-56578 Antonio Digital blog | ||
STANAG 4538 | 3G ALE | last seen Apr 2018 | |
STANAG 4539 | MIL-STD-188-110B/C App C | Seen in Oct 2018 UDXF logs | MIL 188110C Waterfall |
110C WB | |||
STANAG 5066 | encrypted; use for file xfers/emails |
Amateur Related Modes Used by Other Entities
These modes have been reported once in a while by SHARES, MARS or the ICRC. Their use is sporadic at best.
Mode or Description | Synonym | Notes | Waterfall Page |
---|---|---|---|
AX.25 300bd FSK Packet Radio | AX.25 | Protocol Name based off X.25 Standards | |
PACKET | |||
MFSK16 | |||
MT-63 | |||
OLIVIA | |||
PACTOR-I | used in the maritime svc | ||
PACTOR-II | used in the maritime svc | ||
PACTOR-III | used in the maritime svc - often encrypted | ||
PSK31 | |||
WinMOR |
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