USB or LSB on 20 meters

To make communications consistent and to keep bandwidths to a minimum , the convention is to use lower sideband (LSB) communications for the longer wavelength (lower frequency) bands at 160, 75, and 40 meters.

LSB is Lower Side Band and refers to the lower side band on a given channel. USB is Upper Side Band and refers to the upper side band on a given channel .

Most primary users on 60 meters operate USB or wide-shift digital signals , so they are relatively easy to recognize. To help you identify the sounds of popular amateur digital modes, see the Get on the Air with HF Digital web page at www.arrl.org/hf-digital.

SSB Frequency Lists Basic Frequency Lists and Bands for Listening to SSB (in KHz)160 Meters1850-2000LSB80 Meters3600-4000LSB60 MetersUSB40 Meters7125-7300LSBSSB Frequency Lists – C. Crane ccrane.com › ssb-frequency-lists