No, you can't do this with the "mini loop" antenna, you need a good & strong signal source. Please read all the gory details at: http://www.elecraft.com/manual/RX%20sideband%20null%20procedures%20rev%20A1.pdf Works only with MCU 1.22 firmware. 73, DH3HS P.S: Dear Elecraft webmaster: spaces in filenames suck! Thos %20 are not pleasing the eye ... :-)