A lot of the functionality of DSP radios now come from algorithms, not
electronics. Those features, like DNR, NB, auto-notch, etc., are hard to
reduce to a numerical spec.
Vendors really ought to specify the algorithms used (with literature
references if possible - and even source code) so that users can know what
they're buying. (And reviewers know what they're reviewing.) They will say
it's all proprietary, but I will favor those with open-source solutions...
Otherwise we get all these comments about liking or not liking what we hear
- from users who may or may not have wide experience or discriminating ears.
My experience is that what you get is a (more-or-less) monotonic but
non-linear function of what you pay, at a given level of technology. [A
$10K radio is not likely to be 3x better than a $3K radio across the board,
but it will probably have a better paint job.]
73 to all
Martin AA6E
On Tue, Nov 16, 2010 at 1:13 PM, Rick - NJ0IP / DJ0IP <Rick@dj0ip.de> wrote:
> John, I saw 3 reviews and 2 of them said the NR was good.
> I believe it is excellent.
> Please send a link to the post you are talking about.
>
> 73
> Rick
>
> -----Original Message-----
> From: tentec-bounces@contesting.com [mailto:tentec-bounces@contesting.com]
> On Behalf Of John Rippey
> Sent: Sunday, October 31, 2010 2:47 PM
> To: tentec@contesting.com
> Subject: [TenTec] Question for techies
>
> I notice a comment by the first Eagle reviewer on eHam.net that the DNR
> feature was unimpressive.
>
> Similar comments have been made about the DNR feature in the Kenwood
> TS-590,
> including it continues the (to me awful) SPAC
> setup of the TS-570.
>
> On the other hand, Icom's 7700 and 7600 seem to provide the best DNR
> iteration so far, based on the comments I've seen. Yaesu, as usual, seems
> to
> lag behind in the effectiveness of its various DNR iterations. So, why does
> it seem so difficult for manufacturers (other than Icom) to get DNR right
> in
> a DSP environmnent? Is it the cost of the hardware, firmware, software
> engineers, or what?
>
> 73,
>
> John, W3ULS
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--
Martin S. Ewing, AA6E
Member IEEE, URSI, AAS, ARRL
Branford, Connecticut
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