Maybe I'm wrong, but can I assume that the narrower filters have a greater
minimum length? If so, my observations have a strange quirk. I don't
remember the exact numbers, but as I was reducing the bandwith from say,
1000 Hz, at 280 Hz, the filtering went wide open. However, when I continued
down to 270 Hz, the filtering was restored. Then at 200 no filtering, 190
filtering, etc.
----- Original Message -----
From: "Sinisa Hristov" <shristov@ptt.yu>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Friday, March 03, 2006 1:54 AM
Subject: Re: [TenTec] Orion 2.055 Observations
Mark Erbaugh wrote:
If you set the number of taps for the DSP filters to 32 (minimum), the
filter doesn't track bandwidth changes very well. As you decrease the
bandwidth (in 10 Hz steps), you will find a step where there is
essentially no filtering (i.e. it opens wide). This is repeatable.
This is normal.
There is a theoretical minimum filter length for a given bandwidth.
73,
Sinisa YT1NT, VE3EA
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