I have a 6400M that I use in standalone mode. I do not have my 6400M tethered to a PC running SmartSDR. The touch screen manual notch works perfect, however auto notch (if it exist) does not. I am spoiled with my ICOM IC-7700 which the auto-notch works. Just enable auto-notch and the offending carrier inside the passband is gone. No other interaction on my part is required. When will Flex get auto-notch working ?