Hi! I observe many specialists on this reflector so that I cannot hesitate to ask a few WHY questions about DSP noise reduction. Why " with weak signals it is harder for the DSP NR to determine what
Hi Gerhard, You should first read page 45 of the Orion II Operating Manual: http://radio.tentec.com/cms-files/566_manual_release2_0106.pdf ** "DSP noise reduction in the ORION II interacts somewhat w
<SNIP> NOT AT ALL! All the good NR techniques use the high correlation of a desired signal and the relative lack of correlation of noise to discriminate between the two. At least that's what the book
NR is an adaptive filter, and adaptive filter IS a filter, its sole purpose being that of bandwidth reduction. What makes is different from "ordinary" filters is the adaptive method of tuning, and n
Bill, W4ZV There is an important difference between the NR filter (Adaptive Predictor with Leaky LMS) and just narrowing the passband with the BW control; the NR will quickly increase attenuation dur
How quick is "quickly" in real Orion operation? 73, Sinisa YT1NT, VE3EA _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman/l
That may be the way it used to work, As I remember 1.371 it was. The OII does not get 'VERY QUIET' anymore.... What has happened is TT rewrote it all (V2) and now things are not the same. IMHO most s
period between CW elements and during pauses/low level points in speech Good question Sinisa. At reasonable CW speeds, this would need to be in the order of milliseconds to quiet noise between "dit"
MDS, S/N and similar measurements with NR on must be peformed completely with the signal present, and not by switching the signal on and off. If the signal goes off, NR would readapt, so the sytem be
I submit the only way to check the NR function is by listening. It either works or it doesn't. It hasn't worked since version 1.371. K4ia "Buck" Fredericksburg, Virginia USA _________________________
Sinisa replied: must be performed completely with the signal present, and not by switching the signal on and off. I agree. I meant with the signal always present and DSP BW always = 100 Hz, but with
I've been poking at NR on and off for a couple of days now on 2.032. Using an Elecraft N-gen noise generator to a Daven RF attenuator (to control the fixed output of the N-gen), with an 8640B provid
Ahhhh Hummm... I agree w/ "Buck".. (speaking as a software-type here..) a true NR system implemented in software is capable of "intelligently manipulating" noise and signal in a way that can not be d
Bit by bit? Really? Did you patent that yet :-) Define "works". Give me a definition that I could use to hang my hat on, so I could tell what NR products work, or don't by that definition. Aren't yo
Hi, Depends how and where you you connect the scope, and how you use the scope. If you monitor an analog audio signal before digitization and also after the DSP NR when it is analog audio again, usin
Well actually, yes. We looked at an "information frame" of 8 bits and made determinations about each "frame", and applied "exterior intelligence" (to coin a phrase) upon each frame, but certainly we
Incidentally, I also have professional experience with adaptive noise elimination. I agree completely with the comments below. Has nothing to do with bandwidth as measured on a scope. Obviously, we a
Yes Grant...I can reply to this one.... It is really bit by bit. Regards, Gary so you _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting
I'll be anxious to see such a commercialized system for SSB, for example, that can "simply" delete all of the "noise bits". I could really use that the next time a storm rolls through north Texas. G
Gary, I'm interested in learning more about this technique. Can you recommend any reference material on the subject? Thanks, Lin WB1AIW _______________________________________________ TenTec mailing