[TenTec] tighter filter for Jupiter

[Duane A Calvin]

Hmm, standard measurement would say it should be 300 Hz at the 6 dB down
point, and then wherever it measures at 60 dB down would give you the
shape factor (how vertical the skirts are.)  Have you sent a note to
Ten-Tec about what you're seeing vs. what the rig is providing?  Perhaps
there's a problem somewhere?

        73,  Duane



On Thu, 11 Mar 2004 09:04:43 -0500 (EST) jsb at digistar.com writes:
> On Wed, 10 Mar 2004, Jason Buchanan wrote:
> 
> > Does anyone know if there is a way to get a tighter filter for 
> the
> > Jupiter?  I find myself trying to squeeze the bandwidth filter 
> tighter
> > than 300Hz.  There are times I wish I had 100Hz! :-)
> 
> 
> Thanks to all who replied.
> 
> 
> I would ultimately prefer to see the firmware modified slightly to 
> further
> narrow the bandwidth instead of a post-AF stage filter.
> 
> It seems, using MixW to analyze the output viewing the waterfall, 
> that at
> 300Hz the bandwidth is actually closer to 600Hz wide, 300Hz wide 
> either
> side of center frequency.  I was hoping the 300Hz filter would be 
> 300Hz
> edge-to-edge, not 300Hz either side of the VFO frequency.
> 
> 
> thanks,
> Jason N1SU
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> 


Duane Calvin, AC5AA
Austin, Texas