General Information
Pactor-I mode is a proprietary standard developed by SCS GmbH & Co. KG, Hanau, Germany.
Usage:
§ Data communication over HF.
§ In successive standards Pactor-II and Pactor-III the mode Pactor-I is used during the call set-up.
Mode Details
|
|
Item |
Value |
|
Standard |
Modulation |
FSK |
|
|
Number of tones |
2 |
|
|
Shift (Hz) |
200 |
|
|
Bandwidth (Hz) |
300 |
|
|
Symbol rate (Bd) |
100 / 200 |
|
|
Coding |
Huffman code |
|
Demodulator Settings |
Demodulator |
FSK 2 matched |
|
|
Symbol rate (Bd) |
200 |
|
|
SR tolerance (Bd) |
5 |
|
|
Shift (Hz) |
200 |
|
|
Shift tolerance (Hz) |
10 |
|
|
Modem type |
Multiple SR |
|
|
Min. burst length (s) |
0.120 |
|
|
Max. burst length (s) |
1.000 |
|
|
Min. pause length (s) |
0.170 |
|
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 153: PACTOR I
Figure 53: PACTOR I Spectrogram