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BFO adjusting procedure

iz oos
 

In traditional rigs and in DDS there is a variable capacitor that is used to precisely and easily adjust the BFO or the DDS output. In dongles it can be easily done via the software. Using the 10mhz reference signal or the carrier of any SW broadcast is a matter of seconds to adjust it precisely. As the BFO in my Ubitx is off around 150hz, I wish to know whether there is an easy way to adjust it. My rig is Ubitx ver. 3 and original firmware.