Mark, I also use a F3000 and 2.5.3 software and have seen these type of humps in the phone bands. In my experience, the NB works best on pulse type noise (engine noise), like Power Line (60Hz. and related artifacts. Random Noise of Intermittent amplitudes and frequency appear to be best handled by the NR option.
The performance of both of these options can be modified in Setup, DSP to more be more adequate in processing the noise in your location. It took some expermentation to adapt them to best performance on my resident noise but I typically see a 10-15 dB. reduction in my powerline noise at the expense of getting some undesireable IMD from very strong in-band signals. But that is the price that one must pay with any type of noise suppression.... I have found that these options far out perform any that I have ever had in Kenwood or Icom analog radios over the years, most recently TS850SAT and TS2000. 73 es CUL doug K4DMH A HAPPY FLEXER OJ _______________________________________________ Flexedge mailing list [email protected] http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is used for posting topics related to SDR software innovation and other technical SDR topics.
