I can’t work this out, when tuning with the mouse wheel I get a “mirror image” tuning display on the waterfall. This happens on both my DUO and DX and at any frequency antenna selection, attenuation level, low IF or zero IF, or modulation type. Best to look at the image attached.
Hi Merlin, fancy seeing you here!
If you have recently updated the SDRUno software, try doing a ‘reset to factory settings’ via the OPT menu. When I went from v1.3 to 1.4 I had a number of weirdos going on, including gross overloading at any gain setting and malfunctioning controls. A reset put it all right. If it’s a no-go, a quick support ticket via the main website will get some attention.