[TenTec] Orion Noise Reduction Ability

[Pfizenmayer]

A "trick" under uncrowded band conditions that sometimes makes the DSP NB 
very effective is to force the main rx roofing filters to 6 or 15 Khz - then 
try the DSP NB. I  stumbled into this one evening when I happened to notice 
the DSP NB worked very well on a noise using the sub reciver but was 
ineffective on the main rx. Apparently the DSP likes to see a wider 
bandwidth of noise to work on- which it does with the sub rx .

73 de Hank K7HP


----- Original Message ----- 
From: "Gary Tuck" <gtuck at mac.com>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Sent: Wednesday, March 21, 2007 12:47 PM
Subject: Re: [TenTec] Orion Noise Reduction Ability


> Tried responding to the original query before but used the wrong
> email address and 'fraid it got stuck somewhere for review.
>
> Certainly agree that hardware NB works very well.  Takes out power
> line noise here handily.  I have found one use for the DSP NB and
> that is with the
> Asian OTH radar.  If cranked up to 9, it takes most of it out here in
> the OR.  As for the NR, opinions vary.  When I've listened to SSB
> it does sound as if it works fairly well.  On CW, it distorts the
> signal and reduces the background noise to gurgles.  Actually, more
> harm than good.  Running v2.059d here as well.
>
> 73, Gary W7TEA
>
>
> On Mar 21, 2007, at 12:10 PM, Randy Hargenrader wrote:
>
>> My two centalvo's...
>>
>> I find the NR on the Orion V2.059 to work very well.  It does an
>> effective job of acting like a sort of squelch for SSB and I like the
>> fact that there aren't alot of artifacts in the process.  I didn't
>> like
>> the V1.372 NR function as it created a ton of artifacts reminiscent of
>> an outboard DSP device like the NIR-10 and the "Hear It" speaker
>> devices.  Kind of an underwater sound...
>>
>> The hardware noise blanker is also quite effective on pulse noises.  I
>> have however found the DSP "side" of the NB to be totally ineffective.
>> I have never found a situation where it makes any difference or
>> improvement.
>>
>> Hope this helps.
>>
>> 73,
>> Randy
>> K4QO
>>
>>
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