Olivia
A very robust text mode that spreads each character across many tones, so it copies through noise and fading.
ModeOlivia
FamilyMultitone data
Audio example12 s
What does it sound like?
Plate 43Multitone data
A choir of tones hopping up and down, like a slow, busy music box.
0 Hz1,0002,0003,000 Hz
12-second example. A clean example made by our own signal generator; signals on the air usually sound noisier.
Field marksOne of many tones at a time (for example 32 tones in 1 kHz)Slow and very robustA soft, wandering melody
Who uses it?
Amateur radio operators, including nets and emergency groups.
Where and when can I hear it?
Various ham frequencies; common formats use 8 to 32 tones across 250 to 1000 Hz.
Easily confused with
- Contestia: Contestia is Olivia's faster cousin
- MFSK (MFSK16/32): MFSK16 has 16 tones and moves faster