General Information
TErrestrial TRunked rAdio (TETRA) is a standard for digital voice and data mobile communication over radio. The standard has been released by ETSI organization. More than 100 countries across Europe, Middle East, Africa, Asia Pacific, Caribbean and Latin America are using TETRA systems. The standard is being updated and extended continuously by ETSI.
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 |
Demodulator |
DPSK 2,4,8 A/B |
|
|
Symbol rate (Bd) |
18000 |
|
|
SR tolerance (Bd) |
10 |
|
Demodulator Settings |
Demodulator |
DPSK 2,4,8 A/B |
|
|
Symbol rate (Bd) |
18000 |
|
|
SR tolerance (Bd) |
10 |
|
|
Modulation order |
4 |
|
|
Version |
B |
|
Features |
Demodulation |
yes |
|
|
Recognition |
yes |
|
|
Decoding |
yes |
|
|
Automatic Polarity Adjustment |
yes |
|
|
Combination with other modems (modem list) |
yes |
|
Tuning |
The tuning frequency is the center of the signal’s frequency range | |
Table 22: TETRA
Figure 20: TETRA Spectrogram
Demodulator Settings
Table 23: TETRA Demodulator Settings