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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

  • As of Jan 2018, using the logs from the UDXF and others.


Mode or Description Synonym Notes Waterfall Page
ARINC 635 HFDL HFDL Waterfall
HF ACARS
HF DATALINK
Australian Forces 50bd/600bd encrypted
BAUDOT ITA-2 misnomer; ITA2 is coding scheme. Baudot Waterfalls
RTTY
CCIR493-4 Selcall CODAN 8580 Misnomer; Radio Modem Name CCIR493 Waterfall
Chinese 4 plus 4 Modem encrypted
CODAN CHIRP occasional use CODAN Chirp Waterfall
CW Morse heavily used by Russ Mil (AF, etc.) CW Waterfall
FAX FAX Waterfall
FSK100 POL-FSK Uses 63bd/125bd BPSK too; encrypted FSK100 Waterfalls
AK10 per Hoka
GMDSS/DSC Maritime Selcall GMDSS DSC Waterfall
Japanese Mil 8-FSK encrypted Jap 8Tone Waterfall
Japanese Slot Machine Mode is QPSK1500; encrypted QPSK1500 Waterfall
MIL-STD-188-110A encrypted Waterfall de DX Asia
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-I used in the maritime svc
PACTOR-II used in the maritime svc
PACTOR-III used in the maritime svc - often encrypted
PACTOR-IV used in the maritime svc - often encrypted
PSK Used by Enigma P03 Polish-QPSK recently
RDFT Mode used by HM-01;encrypted HM01 RDFT Waterfall
SITOR-A AMTOR MODE A SITOR-A Waterfalls
ARQ
SITOR-ARQ
TOR
SITOR-B AMTOR MODE B SITOR-B Waterfall
FEC
SITOR-FEC
STANAG4197 ANDVT encrypted ANDVT Waterfall
STANAG4285 2400bd Modem encrypted STANAG 4285 Waterfall
STANAG4481 FSK CRATT encrypted STANAG 4481 Waterfalls
LINK-4
NATO-75
RATT
STANAG 5066 encrypted;use for file xfers/emails


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
Chinese MFSK PSK-8 last seen Apr 2018
Chinese MFSK last seen May 2018
Chinese 39 tone OFDM last seen Feb 2018
Chinese Selcall last seen Aug 2018
KEGURI DPRK 600 DPRK 600 Waterfall
DPRK 1200 DPRK 1200 Waterfall
MIL-STD-188-110 App B last seen July 2018
MIL-STD-188-110 Hybrid last seen Feb 2018
MIL-STD-188-110A Hybrid last seen Mar 2018
MIL-STD-188-110 Serial Hybrid last seen Jan 2018
MIL-STD 188-110D App.D last seen Apr 2018
MIL-STD-188-141B App. C ALE 3G ALE last seen Apr 2018
Polish FSK 400/800 Polish Intel via I5-56578 Antonio Digital blog-last seen Aug 2018
RS-ARQ ALIS last seen Mar 2018
MERLIN
Saab Grintek MHF50 MFSK Modem last seen Mar 2018 MHF50 Waterfall
Siemens CHP200 CHX200 I5-56578 Antonio Digital blog-last seen Oct 2018 CHP200 Waterfall
STANAG 4539 MIL-STD-188-110B/C App C Seen in Oct 2018 UDXF logs MIL 188110C Waterfall
110C WB
Swiss Forces TmS-430 VFT via I5-56578 Antonio Digital blog-last seen Jul 2018 TMS430 Waterfall
Tadiran Autocall via I5-56578 Antonio Digital blog-last seen Sept 2018 Waterfall de DX Asia
Thales Systeme 3000 Skymaster last seen Feb 2018 Systeme 3000 Waterfall
Voice Frequency Telegraphy (VFT) last seen June 2018


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
PSK31
WinMOR