Tetrapol

General Information

Tetrapol is a digital professional mobile radio standard for digital voice and data communication. The standard has been designed by Matra and EADS corporation. Currently Tetrapol networks exist in 34 countries claiming about 70% of the European Digital PMR (Professional Mobile Radio) market.

Usage:

§ Communication in the VHF/UHF frequency range among closed user groups such as public safety, military, industry and transportation.

Mode Details

 

Item

Value

Standard

Modulation

GMSK

 

BT

0.25

 

Bandwidth (Hz)

12500

 

Symbol rate (Bd)

8000

 

Coding

FEC, encryption

Demodulator Settings

Demodulator

(G)MSK

 

Type

GMSK

 

Symbol rate (Bd)

8000

 

SR tolerance (Bd)

10

 

BT

0.25

Features

Demodulation

yes

 

Recognition

yes

 

Decoding

no

 

Automatic Polarity Adjustment

no

 

Combination with other modems (modem list)

yes

Tuning

The tuning frequency is the center of the signal’s frequency range

Table 24: Tetrapol

Figure 21: Tetrapol Spectrogram