When holding in the NR button to adjust noise reduction, I get F1-1,2,3,4 then F2-1,2,3,4 etc for F3 and F4. Going further this is repeated for NRmF5, F6, F7 and F8. Can someone direct me to where in the K3 manual it explains what these settings mean and/or when to use NR or NRm? Thanks. Gene, W2BXR