[TenTec] Orion firmware 1.366

[ac5e at comcast.net]

Well, the number of taps was not on the original menu so I can't say what the default number of taps was. My impression with a moderately strong - S8 on the Orion's slightly stingy meter - and mininum BW is the station falls off the edge of the bandpass a bit faster than I expected it to so I would guess the 199 taps may be a tad sharper than the original default. 

Which will inevitibly bring up a horsepower race. If the Orion has 199 taps the Brand X will have to have at least 1999, Brand Y 2099, and Brand Z 2499. However, I suspect that more than 256 taps may be self defeating, in that diminishing returns set in rather quickly  - but we shall see what we shall see. 

73  Pete Allen  AC5E
> Very interesting development.  This was something I remember from Doug
> Smith's presentation about the Orion at the 2002 TT Hamfest and the lack of
> it in the Orion to date was one of the reasons I returned my during the
> 30-day trial.  For those of you who have upgraded, does this feature allow
> you to sharpen the filters beyond what was in previous releases or were
> previous releases hard coded with 199 taps?
> 
> FWIW, I'm looking at the articles in QEX about the SDR-1K. The software in
> there uses 2048 taps.
> 
> Mark
> 
> > DSP Filter Control
> >
> > User settable DSP Filter Tap Length control was added to
> > the Orion in Firmware Version 1.366.  Adjusting the DSP
> > Filter Tap Length directly affects the  sharpness of the skirts
> > on the associated DSP filter. The Greater the number of Taps
> > in the DSP filter, the greater the sharpness of the filter skirts.
> > This can be thought of as a DSP filter slope control with a
> > range of 33 to 199."
> 
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