General Information
Pactor-III mode is a proprietary standard developed by SCS
GmbH & Co. KG, Hanau, Germany.
It is
an advancement of the Pactor-I and Pactor-II modes.
Usage:
§ ARQ and broadcast data communication over HF.
Mode Details
|
|
Item |
Value |
|
Standard |
Modulation |
DBPSK,DQPSK |
|
|
Number of channels |
2 / 6 /14 /16 / 18 |
|
|
Channel spacing (Hz) |
120 |
|
|
Bandwidth (Hz) |
max 2200 |
|
|
Symbol rate (Bd) |
100 per channel |
|
|
Coding |
Convolutional FEC code |
|
Demodulator Settings |
Demodulator |
Pactor III |
|
|
Min. burst length (s) |
0.300 |
|
|
Max. burst length (s) |
3.400 |
|
|
Min. pause length (s) |
0.035 |
|
|
0 | |
|
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 165: PACTOR III
Figure 57: PACTOR III Spectrogram