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Re: [TenTec] My new ORION

To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] My new ORION
From: Sinisa Hristov <shristov@ptt.yu>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Tue, 24 May 2005 04:41:59 -0400
List-post: <mailto:tentec@contesting.com>
Barry Gross wrote:

> It measures 130-150hz at 6dB down, depending on roofing filter.


The length of Orion's DSP filters is insufficient for
bandwidths below ~300 Hz, and ruins performance below ~180 Hz.
There are probably also some computation inaccuracies.

The 100 Hz DSP filter is a joke. It's ripples settle below
-60 dB at 680 Hz bandwidth, and still hold above -75 dB
at 1200 Hz bandwidth.  GIF can be sent at request.


73,

Sinisa YT1NT, VE3EA
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