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When using SSTV the convention is to use Lower sideband (LSB) below 9 MHz and Upper sideband (USB) about 9 MHz, typically use a filter bandwidth of 3 kHz.
When using RTTY the convention is to run the radio in Upper sideband (USB), typically use a filter bandwidth of 4kHz.
The programs read the demodulated audio from the console over a virtual audio cable.
Examples of virtual audio cables are: