General Information
Visel is a synchronous teleprinter system used in former
Yugoslavia.
It is unknown whether the system is
still in use.
Usage:
§ Data communication over HF.
Mode Details
|
|
Item |
Value |
|
Standard |
Modulation |
FSK |
|
|
Number of tones |
2 |
|
|
Shift (Hz) |
300 |
|
|
Symbol rate (Bd) |
81.3 / 123.5 / 125 |
|
|
Error correction |
FEC |
|
|
Alphabet |
ITA-2 |
|
Demodulator Settings |
Demodulator |
FSK 2 matched |
|
|
Symbol rate (Bd) |
120.9 |
|
|
SR tolerance (Bd) |
3 |
|
|
Shift (Hz) |
300 |
|
|
Shift tolerance (Hz) |
10 |
|
|
Modem type |
Synchronous |
|
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 213: Visel
Figure 73: Visel Spectrogram