Tetrapol

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Tetrapol
Tetrapolnew.jpg
Frequencies 370 MHzMegaHertz (MHz) 10^6 Hz370,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
370,000 kHzKiloHertz (kHz) 10^3 Hz
,400 MHzMegaHertz (MHz) 10^6 Hz400,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
400,000 kHzKiloHertz (kHz) 10^3 Hz
370,000 kHzKiloHertz (kHz) 10^3 Hz
370 MHzMegaHertz (MHz) 10^6 Hz
400,000 kHzKiloHertz (kHz) 10^3 Hz
400 MHzMegaHertz (MHz) 10^6 Hz
Frequency Range 370 MHzMegaHertz (MHz) 10^6 Hz370,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
370,000 kHzKiloHertz (kHz) 10^3 Hz
- 400 MHzMegaHertz (MHz) 10^6 Hz400,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
400,000 kHzKiloHertz (kHz) 10^3 Hz
Mode NFMNarrowband Frequency Modulation
Modulation GMSKGaussian Minimum-Shift Keying
ACF 20 msmilliseconds (.001 of a second).
Bandwidth 10 kHzKiloHertz (kHz) 10^3 Hz10,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
0.01 MHzMegaHertz (MHz) 10^6 Hz
,12.5 kHzKiloHertz (kHz) 10^3 Hz12,500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
0.0125 MHzMegaHertz (MHz) 10^6 Hz
10 kHzKiloHertz (kHz) 10^3 Hz
0.01 MHzMegaHertz (MHz) 10^6 Hz
12.5 kHzKiloHertz (kHz) 10^3 Hz
0.0125 MHzMegaHertz (MHz) 10^6 Hz
Location Europe
Short Description Tetrapol is a digital professional mobile radio standard for digital voice and data communication used by public safety and military throughout Europe. Tetrapol was originally developed by Matra Communication (Currently part of EADS/Airbus Group) in France in the 1980's.
I/Q Raw Recording Download file
Audio Sample
Tetrapol is a digital professional mobile radio standard for digital voice and data communication used by public safety and military throughout Europe. Tetrapol was originally developed by Matra Communication (Currently part of EADS/Airbus Group) in France in the 1980's. At the time, the system was known as as "Matracom 9600".

The first Tetrapol customers were the Gendarmerie (mid-1992) and the police (early 1995) in France. Today, Tetrapol technology is supported and is being further developed by two organisations: the Tetrapol Forum (predominantly manufacturers) and the Tetrapol User's Club (user organisations). Tetrapol is not to be confused with the similar sounding TETRA system.


Characteristics[edit]

Tetrapol uses a documented data format with undocumented voice codec and optional undocumented encryption algorithms. Tetrapol is FDMAFrequency Division Multiple Access with a channel width of 10 kHzKiloHertz (kHz) 10^3 Hz or 12.5 kHzKiloHertz (kHz) 10^3 Hz.

Tetrapol runs at 8000 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. with an ACF of 20.069 msmilliseconds (.001 of a second). The raw data rate is 8000 bpsBits per second (bps).


Samples[edit]

Idling with Traffic Trunking Control
Channel

Tetrapol idle and tfc.jpg
Tetrapolnew.jpg

Additional Samples[edit]

Digital Voice Traffic:

Idling:

Frequencies[edit]

380-383, 390-393

370-400 MHzMegaHertz (MHz) 10^6 Hz. Usually more channels in a group together.


Video Examples[edit]

Decoding Software[edit]

Hobby Level Software

Additional Links[edit]

Additional Images[edit]