I'd also be wary of relying on digital photographs of radios on the web since you don't know what color balance was set on the camera, and what the actual ambient lighting is. Many digicams leave mu
Can't even spell my own name :-) Grant/NQ5T _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman/listinfo/tentec
Yep! Did you mean "cockpit" error or "crackpot" error? :-) (No personal references intended or implied, it just seemed funny or cute or maybe snide to me at the time I typed it. I'm tired of being t
If you operate CW with reasonably narrow bandwidths, DSP NR is largely superfluous, if not downright useless. The most effective noise reduction tool in CW mode (any radio, not just the Orion/II) is
Actually, in the later releases the AGC Treshold is tied to RF Gain, so when you reduce RF Gain you also change THRESHOLD, regardless of what the menu says. You just can't see what it has been chang
.. a working Orion II. I think my II got mad at me for spending too much time using the 1.373b5 Orion, and elected to punish me by refusing to power up :-) So the II is headed to Ten-tec for re-anima
I normally just drop off at the local UPS Store after printing my shipping docs with an on-line UPS account. But like Staples, the UPS Store is a franchise operation and employees are not UPS employ
There remain some apparent descrepancies between the manual description and current algorithm operation, and probably everyone agrees one or the other should be fixed. Which one should be the focus
NR did not break between 1.371 and 1.372 if SNR improvement was your objective. Some characteristics changed, but weak signal SNR improvement was consistent with previous versions. Grant/NQ5T ______
I suspect that was something like the source of the problem. I've had the same driver for years, who showed up like clockwork around 5:30 pm, knew us by name, and wouldn't have missed a pickup. Sudd
The purpose of NR is to increase SNR. It may be nice to have "quiet" copy, but if SNR doesn't improve, you will have quiet nice quite copy of nothing! You may recall I measured in some detail the NR
It's done in the DSP processors that handle all other receiver tasks. Not sure who might have led you to believe that there were dedicated or specialized NR processors. As far as I know, NR is imple
By "other tasks" I was referring to other DSP tasks, not GP computing tasks. The DSP processors have a LOT of work to do. Grant/NQ5T _______________________________________________ TenTec mailing li
In the v1 Orion it is most definitely the case. It's clearly observable on a spectrum analyser, and isn't just the "analog thinking" of a newbie. This is as much "true DSP noise reduction" as any ot
This IS becoming a semi-annual thing isn't it. :-) It isn't just the topic, it's almost literally the same discussion. I'd call it déjà vu, but it's more than just the "spooky feeling"
Actually, not necessarily. Autocorrelation (and also the cross correlation matrix) IS used in one form or another in establishing the error term between the de-noising filter's output and the desire
It's true that we're all running blind :-) Grant/NQ5T _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman/listinfo/tentec
The textbook I referred to is available from Amazon. You can take it up with the author if you don't agree with the mathematical derivation or operation of a Wiener filter. It is written in English,
The Orion and II have TWO 32-bit floating-point ADI SHARC DSP chips. You can find schematics on rfsquared.com, with all the detail you might want (but no lines of code). Iknow we're all trying reall