General Information
Pactor-I mode is a proprietary standard developed by SCS
GmbH & Co. KG, Hanau,
Germany.
The FEC/Unproto variant is
used for broadcast transmissions.
Usage:
§ Broadcast data transmissions over HF.
§ During call set-up Pactor-I-FEC mode is used.
Mode Details
|
|
Item |
Value |
|
Standard |
Modulation |
FSK |
|
|
Number of tones |
2 |
|
|
Shift (Hz) |
200 |
|
|
Symbol rate (Bd) |
100 / 200 |
|
|
Coding |
Huffman code, CRC |
|
Demodulator Settings |
Demodulator |
FSK 2 matched |
|
|
Symbol rate (Bd) |
200 |
|
|
SR tolerance (Bd) |
1 |
|
|
Shift (Hz) |
200 |
|
|
Shift tolerance (Hz) |
20 |
|
|
Modem type |
Multiple SR |
|
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 156: PACTOR I FEC
Figure 54: PACTOR I FEC Spectrogram