At the beginning of December, JS8Call released their version 2.0, adding two faster transmission speeds (Fast and Turbo). This week, 2.1 was released, adding a Slow speed that can work in even weaker SNR conditions.
Mode | Bandwidth | Speed | Frame Length | Mininum SNR |
---|---|---|---|---|
Slow | 25 Hz | 8 WPM | 30 seconds | -28 dB |
Normal | 50 Hz | 16 WPM | 15 seconds | -24 dB |
Fast | 80 Hz | 24 WPM | 10 seconds | -20 dB |
Turbo | 160 Hz | 40 WPM | 6 seconds | -18 dB |
The new MULTI decoder can decode all four speeds at once.
A few weeks ago, I gave it a quick spin and got copied on “Turbo” by a station near Boston at -13 dB on 80 m (at 22:30).