OLIVIA is an amateur digital teletype mode designed by Pawel Jalocha SP9VRC in 2005. Its goal was to be effective even in poor propagation conditions. It can also decode well under other noise, QSB, QRM, flutter caused by polar path propagation and even auroral conditions. Olivia uses 7-bit ASCII alphabet. There are a handful of amateur digital modes that are derived from Olivia, including RTTYM and PAX.
Olivia is occasionally utilized during the Shortwave Radiogram transmissions, which run every weekend on WRMI and WINB (USA). See the SW Radiogram website for the schedule.
125, 250, 500, 1000, and 2000 are the available bandwidths. 2, 4, 8, 16, 32, 64, 128, and 256 are the available tones. There are a total of 40 possible submodes.
Olivia's submodes are determined by bandwidth and number of tones. This is represented with the "OLIVIA X/Y" or "OLIVIA X-Y" format, where X = # of tones and Y = Bandwidth in HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).. E.g.: OLIVIA 8-250 means 8 tones with 250 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). bandwidth.
The standard Olivia submodes (tone/bandwidth) are 4/125, 8/250, 16/500, 32/1000, and 64/2000.
The most commonly used submodes in order of use are 16/500, 8/500, 32/1000, 8/250, and 16/1000. Most Olivia usage is using one of the 7 following submodes: 32/1000, 16/1000, 16/500, 8/500, 8/250, 4/250, and 4/125.
This mode has been utilized during tests run by a couple of stations every weekend. See the Shortwave RadioGram website for the schedule.
- HF Link list of Olivia frequencies
- See the ARRL Frequency Allocations page for the US use of 5 MHzMegaHertz (MHz) 10^6 Hz
- Hobby Level Software
- DM780 (Digital Master 780- part of Ham Radio Deluxe)
- TIVAR Android fork of FLDigi
- Professional Software