I just did some preliminary measurements and it looks like with 199 taps
selected, the filters are identical to what they were before. So it appears
we always had 199 taps and now we can soften or widen the filter slope by
selecting less taps.
What I like in this version is for the first time since I received my Orion
last May, my CW sidetone is clear in my headphones. It was always scratchy
in the headphones before. And the SSB monitor is now clear sounding in
headphones instread of being distorted.
Carl Moreschi N4PY
Franklinton, NC
----- Original Message -----
From: "Bill Tippett" <btippett@alum.mit.edu>
To: <tentec@contesting.com>
Sent: Friday, November 14, 2003 10:02 PM
Subject: [TenTec] DSP Filter BW (1.366 vs previous)
> Mark Erbaugh wrote:
> 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?
>
> N4PY previously reported the original DSP filters as:
>
> Filter 6 DB width 60 DB width Shape Factor
>
> 100 150 440 2.9:1
> 250 240 470 1.95:1
> 500 510 820 1.6:1
> 1000 980 1160 1.2:1
> 1600 1580 1880 1.2:1
> 2400 2360 2500 1.06:1
> 3000 2930 3270 1.12:1
> 4000 3960 4280 1.08:1
>
> http://dayton.akorn.net/pipermail/tentec/2003-May/033783.html
>
> Carl, how about doing it again for the max and min
> tap settings? It appears that the previous tap settings may
> have been variable with bandwidth, but some measurements would
> be very helpful. If any others decide to make this measurement,
> remember to take the roofing filter out of the picture by fixing
> Xtal Filter to 20 kHz.
>
> 73, Bill W4ZV
>
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