Coquelet

Coquelet
Frequencies	3 MHz,30 MHz
Frequency Range	3 MHz - 30 MHz
Mode	USB
Modulation	MFSK
ACF	—
Emission Designator	—
Bandwidth	300 Hz,500 Hz
Location	Worldwide
Short Description	Coquelet is an MFSK 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.