Mark,
The Orion filter width in AM mode is measured from each side of zero beat.
So a 3500 hertz filter on AM is really 7000 hertz total bandwidth. If you
want 3500 hertz, select 1750. The Jupiter in front panel mode is also like
this.
73,
Carl Moreschi N4PY
Franklinton, NC
----- Original Message -----
From: "Mark Erbaugh" <mark@microenh.com>
To: <tentec@contesting.com>
Sent: Wednesday, September 22, 2004 1:30 PM
Subject: [TenTec] Orion Filters in AM mode
> I was tuning around the SWBC bands and noticed that the Orion rx filters
> don't seem to have sharp skirts in AM. The signal I was listening to was
> being interfered with by a carrier 5 kHz away even with the filter set at
> 3500 Hz.
>
> I brought up the audio spectrum on my computer (using MixW). In SSB mode,
> the skirts of the filter are very sharp (I have my filter set to 199
taps).
> When I switch to AM, they become very broad. Is this something in the
Orion
> or something to do with AM reception? It also seemed that varying the
> number of filter taps had no effect on the AM filter, although the effect
> was clearly visible in SSB.
>
> 73,
> Mark
>
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