General Information
G-TOR mode is a proprietary standard developed by Kantronics Inc. and is used by radio amateurs, military (Irish Air Corps/Navy, Mexican army) and governmental agencies (ICRC).
Usage:
§ Transfer of textual information over HF.
Mode Details
|
|
Item |
Value |
|
Standard |
Modulation |
FSK |
|
|
Number of tones |
2 |
|
|
Shift (Hz) |
170 |
|
|
Symbol rate (Bd) |
100 / 200 / 300 |
|
|
Coding |
Golay code, Interleaving, CRC |
|
|
Alphabet |
ITA-5 |
|
Demodulator Settings |
Demodulator |
FSK 2,3,4 discr. |
|
|
Symbol rate (Bd) |
300 |
|
|
SR tolerance (Bd) |
5 |
|
|
Modulation order |
2 |
|
|
Shift (Hz) |
180 |
|
|
Shift tolerance (Hz) |
20 |
|
|
Modem type |
Synchronous |
|
|
Min. burst length (s) |
0.080 |
|
|
Max. burst length (s) |
2.000 |
|
|
Min. pause length (s) |
0.080 |
|
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 | |
Table 123: G-TOR
Figure 43: G-TOR Spectrogram