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101. Re: [TenTec] Happy Orion owners (was question about updates) (score: 1): Author: "Grant Youngman" <nq5t@comcast.net>; Date: Tue, 2 May 2006 09:22:21 -0500; I think you misunderstand. I suspect anyone who "hates" their [insert whatever radio you don't like here] has likely already divested themelves of it and moved on to something else. Why would anyone; /archives//html/TenTec/2006-05/msg00067.html (10,570 bytes)
102. Re: [TenTec] 2.033 (score: 1): Author: "Grant Youngman" <nq5t@comcast.net>; Date: Tue, 2 May 2006 16:38:00 -0500; Could just be AGC settings, or the characteristics of today's noise. A quick check at the behavior on a spectrum analyser with a constant carrier signal in the passband doesn't show anything signifi; /archives//html/TenTec/2006-05/msg00089.html (9,223 bytes)
103. Re: [TenTec] 2.033 (score: 1): Author: "Grant Youngman" <nq5t@comcast.net>; Date: Tue, 2 May 2006 23:48:45 -0500; It's easily visible in a waterfall display. http://mysite.verizon.net/nq5t/Misc/CWgram.png I've never really figured out if you're right in your conclusion that NR is a downward expander, but the on; /archives//html/TenTec/2006-05/msg00109.html (9,227 bytes)
104. Re: [TenTec] 2.033 (score: 1): Author: "Grant Youngman" <nq5t@comcast.net>; Date: Wed, 3 May 2006 08:00:48 -0500; If NR were being done by bandwidth reduction, the method I've used to measure it should show some improvement in SNNR, at least above the very narrowest bandwidths where the amount of noise relative; /archives//html/TenTec/2006-05/msg00114.html (9,733 bytes)
105. Re: [TenTec] 2.033 (score: 1): Author: "Grant Youngman" <nq5t@comcast.net>; Date: Wed, 3 May 2006 15:47:50 -0500; The are many ways to skin the proverbial cat. Isn't the net effect of passing highly correlated signals (cross-correlated with a signal of known frequency or auto-correlated) and rejecting relativel; /archives//html/TenTec/2006-05/msg00141.html (9,240 bytes)
106. Re: [TenTec] 2.033 (score: 1): Author: "Grant Youngman" <nq5t@comcast.net>; Date: Wed, 3 May 2006 17:15:56 -0500; Good informative post in general. I just purchased a copy of the book. Need some light reading :-) Grant/NQ5T; /archives//html/TenTec/2006-05/msg00144.html (9,040 bytes)
107. Re: [TenTec] 2.033 (score: 1): Author: "Grant Youngman" <nq5t@comcast.net>; Date: Wed, 3 May 2006 23:15:28 -0500; I don't believe anyone has stated that adaptive narrow bandpass filtering is the only algorithmic means of noise reduction. I certainly didn't. So I'm not sure where this is headed ?? Grant/NQ5T; /archives//html/TenTec/2006-05/msg00155.html (8,956 bytes)
108. Re: [TenTec] 2.033 (score: 1): Author: "Grant Youngman" <nq5t@comcast.net>; Date: Thu, 4 May 2006 00:18:11 -0500; A common DSP algorithm as might be found in many amateur devices for noise reduction uses autocorrelation to identify the primary spectral components, and then adapts dynamic filters around those co; /archives//html/TenTec/2006-05/msg00156.html (9,562 bytes)
109. Re: [TenTec] 2.033 (score: 1): Author: "Grant Youngman" <nq5t@comcast.net>; Date: Thu, 4 May 2006 13:03:30 -0500; It actually sounds familiar as you describe it, and I'm reasonably sure I've come across some material that may be what you're describing. Of course, today I can't find it. Any chance you can point; /archives//html/TenTec/2006-05/msg00177.html (9,063 bytes)
110. Re: [TenTec] 2.033 (score: 1): Author: "Grant Youngman" <nq5t@comcast.net>; Date: Thu, 4 May 2006 13:32:53 -0500; Thanks ... Grant/NQ5T; /archives//html/TenTec/2006-05/msg00180.html (10,552 bytes)
111. Re: [TenTec] Another 2.033 problem (score: 1): Author: "Grant Youngman" <nq5t@comcast.net>; Date: Thu, 4 May 2006 23:07:45 -0500; Except it's missing one. NR -- restore the v1 algorithms, and move it back inside the AGC loop. Grant/NQ5T; /archives//html/TenTec/2006-05/msg00218.html (8,062 bytes)
112. Re: [TenTec] 2.033 (score: 1): Author: "Grant Youngman" <nq5t@comcast.net>; Date: Thu, 4 May 2006 23:07:45 -0500; I partly agree, especially about how the signal does -- depending on the signal and the noise and whatever else -- "stand out" as you say. But much of what causes it to appear to do that are all of; /archives//html/TenTec/2006-05/msg00219.html (8,947 bytes)
113. Re: [TenTec] Orion Noise Reduction (score: 1): Author: "Grant Youngman" <nq5t@comcast.net>; Date: Fri, 5 May 2006 12:09:49 -0500; Does anyone know what change was made in 1.372 that affected the behavior? I looked through the History file on the v1, and nothing is jumping out at me in the 1.372 changes. I believe that was wher; /archives//html/TenTec/2006-05/msg00238.html (8,764 bytes)
114. Re: [TenTec] Orion v2.056 PSK question (score: 1): Author: "Grant Youngman" <nq5t@comcast.net>; Date: Sun, 7 May 2006 23:22:19 -0500; That's because the TX EQ does not behave quite the way it's described in the manual. The way the book shows it, the output at the high frequency end (when using "-" TX EQ values) is "anchored" and y; /archives//html/TenTec/2006-05/msg00304.html (9,259 bytes)
115. [TenTec] Orion v1 - Orion v2/II NR Comparison (score: 1): Author: "Grant Youngman" <nq5t@comcast.net>; Date: Thu, 11 May 2006 01:24:33 -0500; I've had the opportunity to measure NR performance on several firmware loads on a v1 Orion and the Orion II (2.032). The results are both not surprising and surprising at the same time. All of these; /archives//html/TenTec/2006-05/msg00339.html (9,467 bytes)
116. Re: [TenTec] Orion v1 - Orion v2/II NR Comparison (score: 1): Author: "Grant Youngman" <nq5t@comcast.net>; Date: Thu, 11 May 2006 10:09:04 -0500; This is something that bugged me from time to time, that never did get much press on the v1. If NR is on, AN is ineffective (or perhaps less effective) although the manual notch works just fine. I n; /archives//html/TenTec/2006-05/msg00342.html (9,436 bytes)
117. Re: [TenTec] Orion buyers guide (score: 1): Author: "Grant Youngman" <nq5t@comcast.net>; Date: Fri, 12 May 2006 19:50:26 -0500; Yes. Plus an Orion 565 will come with the v2 sweep mod installed as well. Grant/NQ5T; /archives//html/TenTec/2006-05/msg00376.html (7,567 bytes)
118. [TenTec] Orion 2.034 Up (score: 1): Author: "Grant Youngman" <nq5t@comcast.net>; Date: Tue, 16 May 2006 15:24:06 -0500; Good news on a couple of fronts! Let's hope it all works :-) Grant/NQ5T; /archives//html/TenTec/2006-05/msg00469.html (7,065 bytes)
119. Re: [TenTec] Orion 2.034 Up (score: 1): Author: "Grant Youngman" <nq5t@comcast.net>; Date: Tue, 16 May 2006 16:28:05 -0500; So ... The sub-receiver BW control has been fixed and seems to work properly now ... Good. AM mon now works .... Also good, although it tends to overload easily and buzz and rattle. AM Transmit TGC i; /archives//html/TenTec/2006-05/msg00470.html (9,013 bytes)
120. Re: [TenTec] Firmware 2.033 (score: 1): Author: "Grant Youngman" <nq5t@comcast.net>; Date: Wed, 17 May 2006 08:45:32 -0500; http://members.cox.net/wc4r/Orionfirmware.html So far, at least, 2.034 appears stable, and does fix some baddies that were left in 2.033. Grant/NQ5T; /archives//html/TenTec/2006-05/msg00491.html (7,601 bytes)

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