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Re: [TenTec] Basic question (especially NR operation)

To: tentec@contesting.com
Subject: Re: [TenTec] Basic question (especially NR operation)
From: Joe Giacobello <k2xx@swva.net>
Reply-to: k2xx@swva.net, tentec@contesting.com
Date: Wed, 04 Aug 2004 10:07:44 -0400
List-post: <mailto:tentec@contesting.com>
OK, Grant. While I think I understood the concept of "aggressiveness," I was off track regarding whether it changed its state automatically with changing S/N or one had to help it manually, as I described. Frankly, when I first read their description, I was surprised that it would work that way and I did post a comment to the list questioning it, but no one replied.

Thanks for your input.

73, Joe

Grant Youngman wrote:

manually selecting a very narrow DSP passband filter." Based on their description, I concluded that for the NR to work properly the desired signal had to be present when NR is invoked, and if one tuned to a different signal that one would have turn off the NR and then turn it on again


The NR value adjusts the speed of adaptation, not the amount of NR. A lower value provides a relatively slow adaptation speed, so that once the filter is built it will tend to persist and will change only slowly. A higher value of NR will cause faster adaptation to changing/new/different signal v noise conditions.


Once adaptation is complete, the amount of noise reduction will be the same for any setting of the NR control, and won't change (all other things being equal) if you adjust the NR value.

The "right" setting, like so many things on the Orion, depends on conditions, what you're doing, etc. I typically stick it on about 3 and leave it there, but it's worth experimenting with ...

Grant/NQ5T
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