[TenTec] Questions about NR i.e. Orion

[Ken Brown]

Hi,
>  a
> true NR system implemented in software is capable of "intelligently
> manipulating" noise and signal in a way that can not be detected on a scope
> You will never see this
> manipulatiuon on a scope no matter how hard you try.
>   
Depends how and where you you connect the scope, and how you use the 
scope. If you monitor an analog audio signal before digitization and 
also after the DSP NR when it is analog audio again, using X/Y mode on 
the scope, you can see it. If you see nothing but a straight diagonal 
line, then the DSP NR is doing absolutely nothing. If you see other than 
a straight diagonal line, then there could be any number of things going 
on, some of them not requiring DSP at all, but rather just plain old 
analog tone controls, limiting or phase shift. Even if you don't have a 
perfectly straight diagonal line with the NR turned off, you should be 
able to discern a difference between NR on and off, using a scope this 
way, or by ear. If no difference is discernible by ear, why use it?

Using a scope in X/Y mode to see the NR action is only applicable in 
systems that have audio in and audio out of the NR. Since the Orion has 
IF into the DSP and audio out, you cannot do this.

DE N6KB