General Information
Alcatel-801H is an 8 tone MFSK ARQ teleprinter system.
Usage:
§ Transfer of textual information over HF.
Mode Details
|
|
Item |
Value |
|
Standard |
Modulation |
FSK |
|
|
Number of tones |
8 |
|
|
Tone length (ms) |
10 |
|
|
Tone spacing (Hz) |
100 |
|
Demodulator Settings |
Demodulator |
Coquelet |
|
|
Tone duration (ms) |
10 |
|
|
TD tolerance (ms) |
0 |
|
|
No. of tones |
8 |
|
|
Tone distance (Hz) |
100 |
|
Features |
Demodulation |
yes |
|
|
Recognition |
yes |
|
|
Decoding |
no |
|
|
Automatic Polarity Adjustment |
no |
|
|
Combination with other modems (modem list) |
yes |
|
Tuning |
The tuning frequency is the center of the signal | |
Table 1: Alcatel 801H
Figure 1: Alcatel 801H Spectrogram