In the US and Canada the upper end of the sub-band from 3.6–4.0 MHz, permits use of single-sideband voice as well as amplitude modulation, voice; this sub-band is often referred to as "75 meters".
在美国和加拿大，子频段的上端从3.6-4.0 MHz，允许使用单边带语音以及幅度调制，语音;这个子带通常被称为“75米”。