What is the standard sideband for JT65, JT9, FT4, or FT8 digital signal when using AFSK?

When operating digital modes like JT65, JT9, FT4, and FT8 using a sound card (AFSK), the standard convention is to always use Upper Sideband (USB). This rule applies across all amateur bands, regardless of the frequency. While voice operations on bands below 10 MHz (like 40, 80, and 160 meters) traditionally use Lower Sideband (LSB), digital modes standardize on USB. This ensures that the audio frequencies generated by the software map directly and correctly to the RF frequencies transmitted over the air, preventing inverted signals.