General Information
Olivia is a radio teletype modem developed by radio amateur Pawel Jalocha.
Usage:
§ Transfer of textual information over HF.
Mode Details
|
|
Item |
Value |
|
Standard |
Modulation |
MFSK |
|
|
Number of tones |
4/8/16/32 |
|
|
Shift (Hz) |
200 |
|
|
Symbol rate (Bd) |
31.25 |
|
|
Coding |
Walsh |
|
|
Alphabet |
ITA-5 |
|
Demodulator Settings |
Demodulator |
Multitone (MFSK) |
|
|
Tone duration (ms) |
32 |
|
|
TD tolerance (ms) |
4 |
|
|
No. of tones |
32 |
|
|
Tone position type |
Equidistant frequencies |
|
|
Tone distance (Hz) |
31.25 |
|
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 147: Olivia
Figure 51: Olivia Spectrogram