Gary, Have you read column 2 of page 25 in the manual? What it says is very close to what you have requested - except for explicitly stating that 'some experimentation is required'. It does say which noise sources the IF Noise Blanker is better suited for, and which the DSP Noise Blanker attacks more readily. Further down, it states that the more aggressive NR settings will make the signal sound "hollow".
I don't know just how much more information would be meaningful. There is no one setting that works best for any one type of noise all the time - how far the noise source is from your antenna and how it propagates are additional variables. A "recipe" for any particular situation could become quite complex. To be a valid chart the noise characteristics would have to be expressed in terms of the rise time, duration, and fall times of the noise present *at* the K3 input (not at the source of noise). It makes no sense to me to attach the antenna feedline to a spectrum analyzer to determine the characteristics of the noise before selecting which one to use on the K3. I think it much easier just to try the various settings (given the guidelines already in the manual) and find which one sounds best to your ears at that particular time - most likely the "best" will be different tomorrow because the signal affects the best choice as well as the noise type, and the signal will change with propagation changes too. 73, Don W3FPR Gary Dezern wrote: > At least for myself, it would be useful to have a paragraph or two that could > be titled "K3 NB and NR for Dummies" and might look something like this: > > Each operator and location will experience unique noise sources and > conditions. In order to best use the NB and NR tools, a certain amount of > experimenting is required. That being said, here are some general guidelines > for using NB and NR tools under very "generic" situations. Each operator > will have to play around with these settings for their own situation! > > NB: > > Lightning noise: (?????) > Power line noise: ???? > XYL is vacuuming the house: ????? > Plasma TV noise: > > NR: > > Unlike the NB system, the NR tools are for combating random noise of an > unknown (or random) source. In this case, a starting place for using the > tool might be easier based on mode rather than source: > > SSB: ???? (my favorite is 5-1) > CW: ??? > DATA: OFF > > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
