[TenTec] Hello Orion Users

[Carl Moreschi]

The 500 hertz and 250 hertz filter correction allow you to tweak the center
frequency that passes through the filter to allow for small variation in the
true center frequency the filter passes.  That's all I know right now.  If
you want a wider shape factor, I would just use a wider filter.

73,

Carl Moreschi N4PY
Franklinton, NC
----- Original Message -----
From: "Bill Tippett" <btippett at alum.mit.edu>
To: <tentec at contesting.com>
Cc: <mtracy at arrl.org>
Sent: Tuesday, May 06, 2003 11:26 AM
Subject: [TenTec] Hello Orion Users


> N4PY:
>  >I don't believe any manufacturer has achieved a 1.05 to
> 1 filter shape factor before.
>
>          Which reminds me, does anyone know if the shape factor
> can be changed?  There are times when you might like to do
> that and it should be simple with DSP...i.e. a wider shape
> factor to catch people who call off frequency.
>
>          Also, the Filter Menu - IF Selection (fig 2-24 in the
> .pdf manual) shows "500 Hz Correction" and "250 Hz Correction"
> in addition to the enabling switches.  Does anyone know what
> these do?  I can't seem to find any reference in the text.
>
>          Regarding the roofing filters, there is a 15 kHz filter
> available which must be for FM.  Does anyone know if that
> filter can be manually selected for CW?  I know that auto-
> selection can be disabled but they might not allow the 15 kHz
> filter except for FM.  This would be an excellent way to
> demonstrate the effect of narrow versus wide roofing filters
> on IMDDR3, BDR, IP, etc.  If it can be enabled, ARRL could
> compare the effect, keeping everything else constant when
> they do the Product Review tests...hint, hint to KC1SX ;-).
>
>                                                  73,  Bill  W4ZV
>
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