Coquelet

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Coquelet
Coq 8 intro.png
Frequencies 3 MHzMegaHertz (MHz) 10^6 Hz3,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
3,000 kHzKiloHertz (kHz) 10^3 Hz
,30 MHzMegaHertz (MHz) 10^6 Hz30,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
30,000 kHzKiloHertz (kHz) 10^3 Hz
3,000 kHzKiloHertz (kHz) 10^3 Hz
MHzMegaHertz (MHz) 10^6 Hz
30,000 kHzKiloHertz (kHz) 10^3 Hz
30 MHzMegaHertz (MHz) 10^6 Hz
Frequency Range MHzMegaHertz (MHz) 10^6 Hz3,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
3,000 kHzKiloHertz (kHz) 10^3 Hz
- 30 MHzMegaHertz (MHz) 10^6 Hz30,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
30,000 kHzKiloHertz (kHz) 10^3 Hz
Mode USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables)
Modulation MFSKMultiple Frequency Shift-Keying
ACFAutoCorrelation Function
Bandwidth 300 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).0.3 kHzKiloHertz (kHz) 10^3 Hz
3.0e-4 MHzMegaHertz (MHz) 10^6 Hz
,500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).0.5 kHzKiloHertz (kHz) 10^3 Hz
5.0e-4 MHzMegaHertz (MHz) 10^6 Hz
0.3 kHzKiloHertz (kHz) 10^3 Hz
3.0e-4 MHzMegaHertz (MHz) 10^6 Hz
0.5 kHzKiloHertz (kHz) 10^3 Hz
5.0e-4 MHzMegaHertz (MHz) 10^6 Hz
Location Worldwide
Short Description Coquelet is an MFSKMultiple Frequency Shift-Keying system, similar to Piccolo. Also known as COQ-8, COQ-12, and COQUELET 8 V 2. Uses ITA-2 charset. It's two main modes are Coquelet-8 and Coquelet-13. No longer in use.
I/Q Raw Recording
Audio Sample
Coquelet is an MFSKMultiple Frequency Shift-Keying system, similar to Piccolo. Uses ITA-2 charset. It's two main modes are Coquelet-8 and Coquelet-13. No longer in use.

Coquelet was developed by ACEC in Belgium for police and military use during the early 1960s. It had expanded to French security and customs use, as well as Algerian Ministry of Foreign Affairs (MFA) and Customs use (Primarily used Coquelet-8 and Coquelet-80). Algeria was one of the last users of Coquelet, as moved on to newer modes they had been testing such as Racal MSM1250 "SkyFax" modems and modified PACTOR systems.

  • Coquelet-8: 8-tone 300 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). wide MFSKMultiple Frequency Shift-Keying. Coquelet-8 has baudBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. speeds of 13.33 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second., 20 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second., and 26.67 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second..
  • Coquelet-13: 13-tone 500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). wide MFSKMultiple Frequency Shift-Keying. Coquelet-13 has baudBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. speeds of 13.33 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. and 20 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second..
  • Coquelet-80: Variant of Coquelet-8. Coquelet-80 adds FECForward Error Correction to the Coquelet-8 waveform. Includes sub-variants Coquelet-80S and Coquelet-82S. The main difference is Coquelet-82S can be used in both side bands and uses extended handshaking and synchronizing sequences. Coquelet-80 borrows the same bandwidth and baudBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. speeds of Coquelet-8.


Samples[edit]

Coquelet-8 13.3 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. Coquelet-8 26.7 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second.
Coquelet 8 13.3.png
Coquelet 8 26.7.png

Coquelet-13 13.3 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. Coquelet-13 20.0 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second.
Coquelet 13 13.3.png
Coquelet 13 20.png

Coquelet-80
Coquelet-80.png

Frequencies[edit]

Spotted at:

  • 1078 kHzKiloHertz (kHz) 10^3 Hz

Decoding Software[edit]

Hobby Level Software
  • Sorcerer
  • MultiPSK


Professional Equipment/Software
  • Shoc go2decode
  • Shoc go2monitor
  • Hoka 300-32
  • Krypto500
  • Wavecom W-Code
  • Wavecom W-Spectra

Video Examples[edit]

Krypto500 decoding

Additional Links[edit]

Additional Images[edit]