STANAG 4285
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| Frequencies | 1.89 MHz,22.7 MHz |
| Frequency Range | 1.89 MHz - 22.7 MHz |
| Mode | USB |
| Modulation | PSK |
| ACF | 106.66 ms |
| Emission Designator | — |
| Bandwidth | 2.75 kHz |
| Location | Worldwide |
| Short Description | STANAG 4285 is specified by the NATO (North Atlantic Treaty Organization) Military Agency for Standardization in "Characteristics of 1200 / 2400 / 3600 Bits per Second Single Tone Modulators / Demodulators for HF Radio Links" |
| I/Q Raw Recording | — |
| Audio Sample | |
STANAGNATO Standardization Agreement (STANAG), defines processes, procedures, terms, and conditions for common military or technical procedures or equipment between the member countries of the North Atlantic Treaty Organization (NATO). 4285 is specified by the NATONorth Atlantic Treaty Organization (North Atlantic Treaty Organization) Military Agency for Standardization in "Characteristics of 1200 / 2400 / 3600 Bits per Second Single Tone Modulators / Demodulators for HFHigh Frequency (3-30 MHz) Radio Links". This data modem is very similar to MIL-STD-188-110 Serial.
Characteristics[edit]
STANAGNATO Standardization Agreement (STANAG), defines processes, procedures, terms, and conditions for common military or technical procedures or equipment between the member countries of the North Atlantic Treaty Organization (NATO). 4285 has a variety of speeds and interleaving. Speeds range from 75 bpsBits per second (bps) up to 3600 bpsBits per second (bps). Two interleaving modes exist: Short and Long. Short interleaving allows for faster transmission at the cost of less robustness against effects of fading. Long interleaving extends the interleaving period so that messages take longer to send, but are more robust against fading from propagation effects.
BPSKBinary Phase-Shift Keying (1 bit per symbol), QPSKQuadrature Phase-Shift Keying (2 bits per symbol), and 8PSK8-Phase Phase-Shift Keying (3 bits per symbol) are used with STANAGNATO Standardization Agreement (STANAG), defines processes, procedures, terms, and conditions for common military or technical procedures or equipment between the member countries of the North Atlantic Treaty Organization (NATO). 4285 for specific speeds.
| Symbol Rate (baudBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second.) |
User Data Rate (bpsBits per second (bps)) |
Bits per Symbol (Modulation) |
FECForward Error Correction Encoding Rate |
Supported Interleaving |
|---|---|---|---|---|
| 2400 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. | 2400 bpsBits per second (bps) | 3 (8-PSK8-Phase Phase-Shift Keying (3 bits per symbol)) | 2/3 | Short or Long |
| 2400 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. | 1200 bpsBits per second (bps) | 2 (QPSKQuadrature Phase-Shift Keying (2 bits per symbol)) | 1/2 | Short or Long |
| 2400 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. | 600 bpsBits per second (bps) | 1 (BPSKBinary Phase-Shift Keying (1 bit per symbol)) | 1/2 | Short or Long |
| 2400 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. | 300 bpsBits per second (bps) | 1 (BPSKBinary Phase-Shift Keying (1 bit per symbol)) | 1/4 | Short or Long |
| 2400 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. | 150 bpsBits per second (bps) | 1 (BPSKBinary Phase-Shift Keying (1 bit per symbol)) | 1/8 | Short or Long |
| 2400 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. | 75 bpsBits per second (bps) | 1 (BPSKBinary Phase-Shift Keying (1 bit per symbol)) | 1/16 | Short or Long |
| 2400 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. | 3600 bpsBits per second (bps) | 3 (8-PSK8-Phase Phase-Shift Keying (3 bits per symbol)) | None | None |
| 2400 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. | 2400 bpsBits per second (bps) | 2 (QPSKQuadrature Phase-Shift Keying (2 bits per symbol)) | None | None |
| 2400 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. | 1200 bpsBits per second (bps) | 1 (BPSKBinary Phase-Shift Keying (1 bit per symbol)) | None | None |
There are also variants of 4285, including one used in Thales Système 3000 HF Modems (e.g TRC-1752). The unique identifier of these is the existence of a special preamble at the beginning of the transmission.
Samples[edit]
| IDLE | TFC | 8-PSK8-Phase Phase-Shift Keying (3 bits per symbol) |
|---|---|---|
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| Thales Système 3000 Variant |
Thales Système 3000 FECForward Error Correction Variant |
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Frequencies[edit]
Found on many HFHigh Frequency (3-30 MHz) frequencies between 1.89 MHzMegaHertz (MHz) 10^6 Hz to 22.7 MHzMegaHertz (MHz) 10^6 Hz. See the logs of the Utility DXers Forum at groups.io for month by month usage.
Decoding Software[edit]
- Hobby Level Software
- Professional Equipment/Software
Video Examples[edit]
- SWDMA Step-by-step analysis and decoding of a STANAG 4285 signal transmitted in shortwave.
- Stanag 4285 Decoding with RTL-SDR (RTL2832), Sorcerer and SDR Sharp
- Strong Fading on Military STANAG 4285 Signal
- STANAG 4285 - some Examples
- Modulation Example, digital, STANAG 4285, 6383 kHz, USB, August 16, 2011, 1119 UTC
- Decoding STANAG4285 with Multipsk
Additional Links[edit]
- Radioscanner.RU Thales TRC-1752 STANAG 4285 Variant
- I-56578 STANAG 4285
- shoc Database: STANAG 4285
- WAVECOM Database: STANAG 4285
- Some Notes on STANAG 4285 (PDF) via the UDXF website
Additional Images[edit]
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