General Information
Mobitex-8000 is a wireless packet switched data network found on 400/800 and 900 MHz around the world. The MOBITEX Operator Association (MOA) coordinates the specifications, the operator specific additions and further hard- and software development.
Usage:
Transfer of textual information over UHF
Mode Details
|
|
Item |
Value |
|
Standard |
Modulation |
GMSK |
|
|
Number of tones |
2 |
|
|
Bandwidth (Hz) |
15000 |
|
|
Symbol rate (Bd) |
8000 |
|
|
Coding |
ECC: Hamming (12,8) CRC-16 (CCITT) |
|
Demodulator Settings |
Demodulator |
FSK 2,3,4 discr. |
|
|
Symbol rate (Bd) |
8000 |
|
|
SR tolerance (Bd) |
10 |
|
|
Modulation order |
2 |
|
|
Shift (Hz) |
4000 |
|
|
Shift Tolerance |
100 |
|
Features |
Demodulation |
yes |
|
|
Recognition |
yes |
|
|
Decoding |
yes |
|
|
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 16: MOBITEX-8000
Figure 14: MOBITEX-8000 Spectrogram