<<I'm assuming that using WWV to calibrate should show a 600 Hz CWn tone with 10000.00 MHz on the freq display when the Sidetone Pitch is set to 0.6 KHz.>> That's correct. In CW mode, the receiver is offset from the displayed (and transmit) frequency by the side tone amount so that the carrier beat note will match the sidetone pitch when 10000.00 MHz is displayed. Lou W7DZN