[RTTY] Re: [WriteLog] Measuring filter bandwidth

[Jerry Pixton]

Bob and others interested,

I put several jpeg clips of the filter measurements up on my web site at -

http://www.pixos.com/designs/Filters/

When I view them, I need to click on a little "expand" button that comes up 
in the lower right hand corner of the graphic in Internet Explorer to get a 
clear graphic.

They speak for themselves


Jerry, W6IHG



At 07:58 AM 2/24/2004 -0600, you wrote:
>Jerry,
>
>Can you share your findings?
>
>-Bob
>
> > ------------Original Message------------
> > From: Jerry Pixton <jpixton at shentel.net>
> > To: writelog at contesting.com
> > Cc: rtty at contesting.com
> > Date: Tue, Feb-24-2004 6:25 AM
> > Subject: Re: [WriteLog] Measuring filter bandwidth
> >
> > All,
> >
> > It works great!
> >
> > Jerry and I spent Sunday (while the CW signals "invaded" the rtty bands)
> > quantifying the various filters and their shapes available on his IC756 
> Pro
> > and my IC756 Pro II. I now have the numbers to back up my subjective
> > decision to start using the LSB-D filters for rtty, instead of the regular
> > RTTY filters or the Twin Peak rtty filters.
> >
> > Jerry, W6IHG
> >
> >
> >
> >
> > At 03:12 PM 2/23/2004 +0000, Jerry Flanders wrote:
> > >In the thread: Re: [WriteLog] AFSK on RTTY not LSB on 1000mp field,
> > >At 08:09 2/23/04, Jim Smith wrote:
> > >
> > >>.
> > >><snip>
> > >>Have you actually checked the bandwidth of the filter(s) selected by 
> your
> > >>Nar1 when in RTTY mode?  If you do get 500 or thereabouts for Nar1 and
> > >>250 or so for your Nar2, the next thing is to figure out how you're 
> doing
> > >>it. <SNIP>
> > >>
> > >>73 de Jim Smith   VE7FO
> > >
> > >
> > >
> > >It is easy to check your passband performance (BW, slope, etc) if you 
> have
> > >a sound card connected to the radio's output, as most of us do.
> >
> > ------------------------------------------
> > Dr. Jerry R. Pixton, PIXOS Designs LLC
> > http://www.pixos.com/designs/RadioTuner/
> > jpixton at shentel.net
> > ------------------------------------------
> >
> >
> > _______________________________________________
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> > WriteLog at contesting.com
> > http://lists.contesting.com/mailman/listinfo/writelog
> > WriteLog on the web:  http://www.writelog.com/
> >

------------------------------------------
Dr. Jerry R. Pixton, PIXOS Designs LLC
http://www.pixos.com/designs/RadioTuner/
jpixton at shentel.net
------------------------------------------