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