Voluntary Channelization
Since Olivia signals can be decoded even when received signals are extremely weak, (signal to noise ratio of -14db), signals strong enough to be decoded are sometimes below the noise floor and therefore impossible to search for manually. As a result amateur radio operators have voluntarily decided upon channelization for this mode. This channelization allows even imperceptibly weak signals to be properly tuned for reception and decoding. By common convention amateur stations initiate contacts utilizing either the 16/500 or 32/1000 modes and then switch to other modes to continue the conversation. The following table lists the common center frequencies used in the amateur radio bands.
| Band | 16/500 Frequencies (KHz) | 32/1000 Frequencies (KHz) |
|---|---|---|
| 160 Meters | 1808.75, 1809.25, 1840.75, 1841.25 | N/A |
| 80 Meters | 3577.75, 3583.25, 3522.75 | 3578.0, 3616.0, 3523.0, 3621.0 |
| 40 Meters | 7026.25, 7043.25, 7073.25, 7076.75 | N/A |
| 30 Meters | 10139.25, 10142.25, 10143.25 | N/A |
| 20 Meters | 14076.4, 14075.4, 14078.4 | 14106.5, 14107.5, 14108.5 |
| 17 Meters | 18103.4, 18104.4 | N/A |
| 15 Meters | 21087.25, 21087.75, 21130.25 | 21153.5, 21154.5 |
| 12 Meters | 24922.25 | N/A |
| 10 Meters | 28076.75, 28077.25 | N/A |
| 6 Meters | 50087.25, 50287.25, 50292.25 | N/A |
| 2 Meters | 144136.25 | N/A |
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