[TenTec] [Orion] Orion II Noise Blankers

[Ron Castro]

I would believe that there are a lot of things in the O1 v. 2 upgrade that 
are identical to the O2, probably because substantial parts of the code were 
simply "cut and past" copied into the .ruf file for the original Orion 
upgrade.  It makes sense to do that since there was so much work put into 
the O2, but no doubt some of the code did not transplant perfectly.

If you ever have some time on your hands, you should open one of the .ruf 
files with a hex editor.  You'll quickly see why they didn't want to do a 
line-by-line re-write for the new version O1 version.

Ron N6AHA


----- Original Message ----- 
From: "Lin Davis" <linbdavis at earthlink.net>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Sent: Saturday, February 25, 2006 10:15 PM
Subject: Re: [TenTec] [Orion] Orion II Noise Blankers


> Hi Grant,
>
> Well, I re-read those sections, and have read them many times before, and 
> I
> stand by what I wrote earlier. I believe there is different NR code for 
> the
> Orion I (pre-V2) and that is what that manual description was written 
> about, not
> the the way it is implemented in the O2. It was then left in the manual 
> when
> they word-smithed all the "Orion" character strings to "Orion II" and put 
> it out
> as the Orion II manual. This is based on my own observations, and on all 
> I've
> been reading on this and other reflectors about how the NR behavior has 
> changed
> on the O1 going from V1.xxx to V2.xxx. It sounds like O1 V2 implements is 
> as it
> is in the O2.
>
> Here's why I say this. The manual states that with a NR setting of 1 with 
> a very
> weak signal, "it's going to take a *very long time* for the algorithm to 
> figure
> out....". Well, there just doesn't appear to be any lag at all when NR 1 
> (as
> opposed to NR 2 or 5, etc) is turned on, regardless of whether there is a 
> weak
> or strong signal or no signal at all.
> Another thing the manual description claims is that once the NR has 
> adapted,
> changing the NR value will have no effect. Again, this is contrary to what 
> I've
> observed. If the NR is on 1, even for an extended time, then you increase 
> the
> value, a difference IS heard; it does have an effect.
>
> Besides, there is no way to filter out random, white noise within a given
> passband, if the passband is made smaller, a user listening to a SSB 
> signal
> would notice the bandwidth reduction in an instant, but that's not what 
> one
> hears with the NR. Like I said, it behaves like an expander function would 
> (on
> the O2 anyway - have not played with the O1).
>
> I'd appreciate hearing others experiences about this ...
>
> 73,
> Lin
> WB1AIW
>
>
>
>
> Grant Youngman wrote:
>
>>>Rather than being "another very narrow filter", the NR
>>>behaves more like an expander type of circuit,
>>
>>
>> Not sure what you're referring to there.  That isn't the way T-T 
>> describes
>> it, either in past postings that have been made to the reflector, or in 
>> the
>> manual.
>>
>> Look at the manual description on page 45, 48 at al.
>>
>> Grant
>>
>>
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>>
>
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