I have had excellent results with NB2 for the line noise around here (its bad enough to keep me off the radio if I cannot use it, the regular NB doesn't help). It seems to me that the problem Kurt is describing has gotten worse over the past 6 weeks or so. Just an observation in case anyone sees something that changed to exacerbate the problem.
It does make NB2 almost unusable in contests with very loud signals. Neal Campbell www.abrohamnealsoftware.com AIM:nealk3nc On Dec 19, 2007, at 10:47 AM, KX5KW wrote: > Kurt, > You're not the only one. It makes the noise blanker almost useless > for me since there are always other signals in the 96kc if range. > > Bob McGwier, N4HY, has some excellent ideas for noise cancelling in > the code, but he has a LOT of other projects going on. > > I use a modified version of MFJ-1025 here and although it is very > finicky to get set up and must be reset any time you change > frequency, I would not be able to hear some signals without it. > PM me if you would like any particular info on my setup. > > Kent/KX5KW > > > On Wednesday 19 December 2007 08:21:44 am Kurt Vangsness wrote: >> I've noticed that when NB or NB2 are engaged, large (S9+) signals >> that are outside of the filter end up interacting with the noise >> blanker causing the noise floor to vary in proportion to the >> amplitude of the large signal. For example, if clicking the NB >> results in a 6 dBm decrease in the noise floor, the amplitude >> changes in the large signal outside of the passband will cause the >> noise floor within the passband to increase by as much as 6 dBm. It >> would be nice if the noise blanker could be restricted to only >> operate within the passband. This wouldn't be an issue if the noise >> blanker was so darn good on PowerSDR! ;-) Anyone else see this same >> behavior or do I have something configured wrong? >> >> 73, >> Kurt KC9FOL > > _______________________________________________ > FlexRadio mailing list > FlexRadio@flex-radio.biz > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz > Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ > FlexRadio Knowledge Base: http://kb.flex-radio.com/ > FlexRadio Homepage: http://www.flex-radio.com/ > _______________________________________________ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
