HF Modes Currently Inactive
From The RadioReference Wiki
Many of these modes haven't been used in years. Unfortunately when you buy a decoder like Hoka or Wavecom, you are paying not only for the modes that are active, but for the mostly out-of-date mode decoding as well. Rarely, some of these modes will come to life from time to time, probably to test a circuit, or to supplant a faulty satellite link.
This list can be used to eliminate possible modes used by a mystery signal, enabling one to move onto more productive possibilities.
| Mode Name | Synonym | Notes | Waterfall Page |
|---|---|---|---|
| ARQ-E | ARQ-1000D | ||
| ARQ-E3 | ARQ E3 Waterfall | ||
| ARQ-M2 | ARQ-28 | Also see ARQ-M2-342 | |
| TDM | |||
| TDM-2 | |||
| TDM-242 | |||
| TDM-342 | |||
| ARQ-M4 | ARQ-56 | Also see ARQ-M4-342 | |
| TDM-4 | |||
| TDM-242 | |||
| TDM-342 | |||
| ARQ-N | |||
| ARQ6-70 | |||
| ARQ6-90 | |||
| ARQ6-98 | |||
| ARS-GUARD | SAUD-NAT | ||
| AUTOSPEC | AUTOSPEC MK 1 | ||
| AUTOSPECBAUER | |||
| BAUER | |||
| Australian Forces Continuous MIL-STD-188-110A Serial Tone | Aus MILSTD188110A Serial Waterfall | ||
| Chinese Forces MIL-STD-188-110B 39 Tone Modem Variant | Chinese 39 Tone Waterfall | ||
| CLOVER | Q-CLOVER | ||
| QUAD-CLOVER | |||
| CLOVER-2000 | X-CLOVER | ||
| 8 TONE CLOVER | |||
| CLOVER-2500 | Clover 2500 Waterfall | ||
| G-TOR | Rare use by Braz Navy | ||
| COQUELET | COQ-8 | ||
| COQ-12 | |||
| COQUELET 8 V 2 | |||
| M823/SC104 DGPS | DGPS | US has discontinued use | DGPS Waterfalls |
| DUP-ARQ | 125-ARTRAC | ||
| ARTRAC | |||
| DUP-ARQ-2 | ARTRAC-II | ||
| DUP-FEC-2 | |||
| FEC-A | FEC-100 | ||
| French Navy 50bd/850 Secure FSK | Moved to STANAG modes | French Navy 50Bd Waterfall | |
| Globe Wireless HF Modes | Org used several proprietary modes | ||
| HC-ARQ | |||
| HFD+VL OFDM MODEM | HFD+VL Waterfall | ||
| HNG-FEC | |||
| ICAO ANNEX 10 SELCALL | ICAO SELCALL | ||
| IRA-ARQ | BULG-ASCII | ||
| Iranian Navy QPSK | via I5-56578 Digital Blog | Iranian QPSK Waterfall | |
| Italian Coast Guard 100bd FSK Selcall | Italian CG Waterfall | ||
| Japanese Navy 18 Tone Modem | Jap Navy 18Tone Waterfall | ||
| Japanese Navy PSK Modem | Jap Navy PSK Waterfall | ||
| MIL-STD-188-110B Parallel 16 Tone Modem | 16 TONE MODEM | 16 Tone Waterfall | |
| MIL-STD-188-110B Parallel 39 Tone Modem | 39 TONE MODEM | 39 Tone Waterfall | |
| MIL-STD-188-110B Serial Tone Modem | MIL-STD-188-110A | MIL 188110B Waterfall | |
| MIL-STD-188-110A/B | |||
| PACTOR-I FEC | via I5-56578 Antonio Digital blog | PACTOR1 FEC Waterfall | |
| PICCOLO | |||
| POL-ARQ | |||
| RAC-ARQ | MEROD | Not really a synonym - see article | |
| RACAL-ARQ | |||
| Racal MSM1250 SkyFax | MSM1250 Waterfall | ||
| Racal PANTHER-H FHSS ALE | PantherH Waterfall | ||
| RDFT | Mode used by HM-01;last noted in 2022 | HM01 RDFT Waterfall | |
| RFSM8000 | via I5-56578 Antonio Digital blog | ||
| RS-ARQ | ALIS | last seen Mar 2018 | |
| MERLIN | |||
| ROU-FEC | RUM-FEC | ||
| Siemens CHP200 | CHX200 | I5-56578 Antonio Digital blog-last seen Oct 2018 | CHP200 Waterfall |
| SI-ARQ | ARQ-S | ||
| ARQ-1000S | |||
| SI-FEC | FEC-S | ||
| FEC 1000 SIMPLEX | |||
| FEC-1000S | |||
| SkyOFDM | via I5-56578 Antonio Digital blog | ||
| SPREAD | AUTOSPEC MK II | ||
| SPREAD-11 | |||
| SPREAD-21 | |||
| SPREAD-51 | |||
| SWED-ARQ | ARQ-SWE | ||
| Swiss Forces TmS-430 VFT | via I5-56578 Antonio Digital blog-last seen Jul 2018 | TMS430 Waterfall | |
| TT2300B | TPLEX | ||
| TRA-2300 | |||
| TT2300-ARQ | |||
| Tadiran Autocall | via I5-56578 Antonio Digital blog-last seen Sept 2018 | ||
| Tadiran HF2000 125bd FSK Modem | Tadiran HF2000 Data Waterfall | ||
| Thales TRC1752 | via I5-56578 Antonio Digital blog | ||
| TWINPLEX | TWINPLEX-SITOR | ||
| F7B4 | |||
| F7BNN |
Bit and ACF Analysis
French Navy 50 Baud
Pactor 1 FEC
CHX200
Siemens CHP200
Notes
- ACFs, Audio used for plotting and some waterfalls courtesy of Mike Chace-Ortiz, used with permission.
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- Go to CIS Modes
- Go to Voice Scrambling Systems