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[RTTY] Re: [WriteLog] Measuring filter bandwidth

To: writelog@contesting.com
Subject: [RTTY] Re: [WriteLog] Measuring filter bandwidth
From: Jerry Pixton <jpixton@shentel.net>
Date: Tue, 24 Feb 2004 11:50:10 +0000
List-post: <mailto:rtty@contesting.com>
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@shentel.net ------------------------------------------


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