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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[RTTY\]\s+Multipath\,\s+testing\,\s+soundcards\s*$/: 5 ]

Total 5 documents matching your query.

1. [RTTY] Multipath, testing, soundcards (score: 1)
Author: "Tom McDermott" <tom.mcdermott4@verizon.net>
Date: Thu, 22 Apr 2004 09:57:32 -0500
A lot has been written about RTTY decoding lately. It's may be worthwhile to clarify some of the points. 1. One suggestion has been made to record RTTY signals on various paths, and use those as a st
/archives//html/RTTY/2004-04/msg00269.html (10,443 bytes)

2. Re: [RTTY] Multipath, testing, soundcards (score: 1)
Author: Bill Turner <wrt@dslextreme.com>
Date: Thu, 22 Apr 2004 08:18:53 -0700
_________________________________________________________ Could you please explain this further? It would seem to me that a filter which only processes one bit at a time would have no *knowledge* of
/archives//html/RTTY/2004-04/msg00271.html (8,019 bytes)

3. RE: [RTTY] Multipath, testing, soundcards (score: 1)
Author: "Tom McDermott" <tom.mcdermott4@verizon.net>
Date: Thu, 22 Apr 2004 11:08:23 -0500
Hi Bill, Any filter in fact processes several bits at a time. Left-over energy from previous bits affects the filter state of the current bit. It's a fundamental physical limit, you can blame Mr. Fou
/archives//html/RTTY/2004-04/msg00274.html (10,186 bytes)

4. Re: [RTTY] Multipath, testing, soundcards (score: 1)
Author: Kok Chen <chen@mac.com>
Date: Thu, 22 Apr 2004 09:11:44 -0700
On Apr 22, 2004, at 7:57 AM, Tom McDermott wrote: The CCIR put together a standard for this, and describes the different path conditions to be used for testing. A standalone DSP based path simulator
/archives//html/RTTY/2004-04/msg00275.html (8,757 bytes)

5. RE: [RTTY] Multipath, testing, soundcards (score: 1)
Author: "Tom McDermott" <tom.mcdermott4@verizon.net>
Date: Thu, 22 Apr 2004 11:43:51 -0500
A good point. Johan used his simulator to generate several different audio files for the different path profiles (poor, fair, good, fluttered). That, coupled with a good test pattern could solve both
/archives//html/RTTY/2004-04/msg00276.html (7,715 bytes)

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