With enough time, I suppose one could decipher very noisy signals. I can see some pale-skinned dude sitting in a CIA lab spenting hours cleaning up a recorded secret message, but what about a more re
Hi Sinisa, Wouldn't ~10ms would do it? Can't say for sure, however, that the latest code even uses this method any more. Lin _______________________________________________ TenTec mailing list TenTec
Works = noise goes away. (ver. 1.371) Does not work = push the button and nothing happens, or Does not work = push the button and distortion introduced (everything after 1.371) Don't need to be a sof
Thank you Bill, Jerry, Sinisa, Lin and others for the debate about NR. It did help my understanding! What I read in these responses is that many of us see filtering /bandwidth reduction as the sole m
as the sole means of improving the ability to recover information from noise. I feel this misses the point that I am exploring. In his 1948 landmark paper, Claude Shannon extends the work of Nyquist
of us see filtering /bandwidth reduction as the sole means of improving the ability to recover information from noise. Gert, I believe I said filtering / BW reduction is the way **Orion's NR** works.
there are two schools of thought about copying weak signals. I found that link: http://www.nitehawk.com/sm5bsz/weakcom.htm 73, Bill W4ZV _______________________________________________ TenTec mailing
I have been playing with a SDR-1k recently. The filter scheme in that radio allows down to a 10hz bandwidth. What I have discovered is there is no ringing in a filter this narrow generated by the alg
That definitely true, and a particularly unfortunate feature of the new implementation. Whatever it is, I'm finding it very irritating. Grant/NQ5T _______________________________________________ Ten
Lin, There are many excellent references available, but some of them make for very dense reading. Some of the more basic stuff can be found in Technical notes published by Bruel and Kjaer Instruments
Well, in answer to all this tech stuff on NR.... All I can tell you is: When I had an Orion with 1.371 I USED the NR !!! Now I hate the way it sounds, and I keep it OFF !!! Does anyone else feel that
Grant, NOW you are talking,,, that's what we have been saying all along, (us nonengineers) It's broke! So, some of you guys with pull, (betatesters etc) Please help to get it back the way it was....
Much obliged, 73, Lin _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman/listinfo/tentec
filter scheme in that radio allows down to a 10hz bandwidth. What I have discovered is there is no ringing in a filter this narrow generated by the algorithm used in the SDR, even if the signal being
will take at least 5 times the speed of a square cornered filter and a Bessel will do better than that. The DSP filters in common use do far better than similar analog filters because the DSP filters
K0CQ: Butterworth filter will take at least 5 times the speed of a square cornered filter and a Bessel will do better than that. The DSP filters in common use do far better than similar analog filter
Not quite what I said. The Bessel filter will pass the components of that 200 Hz signal that fit in its pass band without adding the artifacts of ringing. And that Bessel filter will pass most of tha
Bill, Actually I did measure the bandwidth at the "10hz" setting and "25hz" setting. For the 10hz filter: with a 50mV signal injected reading -69.8 dbm at the center freq (the peak reading)I measured
They are 60hz filters. This makes sense Lee. 60 Hz BW is reasonable since clean CW at ~13 WPM should occupy close to ~30 Hz BW; twice that BW would allow faster speeds. The broad shape factor also he