Denis, > which mode, cw or ssb? I would recommend CW, particularly if your receiver's IF is narrower in that mode. Jason's default is for an 800 Hz BFO offset (you can change that if you wish). In my case, my ICOM R75 is set for an 800 Hz offset, and the receiver reads directly in frequency. So when I tune to 186.186 kHz, Dex's Jason tones are centered on 800 Hz. John Andrews, W1TAG