Actions

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
MIL-STD-188-110B encrypted
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. Text is always encrypted and can't be read, though it can be decoded in many cases.


Mode or Description Synonym Notes Waterfall Page
Australian Forces 50bd/600bd
Chinese 4 plus 4 Modem last seen Dec 2019
CODAN Used by Egyptians last seen Nov 2019 CODAN Chirp Waterfall
Israeli Navy Hybrid 188-110 MOD HF Underground Mar 2020 Israeli Navy Waterfall
Japanese Mil 8-FSK encrypted Jap 8Tone Waterfall
Japanese Slot Machine Mode is QPSK1500; last seen Aug 2019 QPSK1500 Waterfall
KEGURI DPRK 600 ARQ last seen Dec 2019 DPRK 600 Waterfall
DPRK 1200 last seen Jan 2019 DPRK 1200 Waterfall
MIL-STD-188-110 hybrid last seen July 2019
MIL-STD-188-110C last seen Feb 2019
PACTOR-II FEC via I5-56578 Antonio Digital blog
STANAG 4538 3G ALE last seen Dec 2019
STANAG 4539 MIL-STD-188-110B/C App C last Seen Oct 2019 MIL 188110C Waterfall
110C WB


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.

MFSK32 and 64 is currently being used by the Shortwave Radiogram program. Olivia and MT63 has been used in the past. See the Shortwave Radiogram Gateway for more information on this subject.


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