[TenTec] Basic question (especially NR operation)

[Grant Youngman]

> 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