[RTTY] Use of Oscilloscope In RTTY

[Doug Faunt N6TQS +1-510-655-8604]

And after a while, you can get really close by ear.
Also, some radios have tuning indicators built-in, and they seem to work
pretty well.

73, doug

   Date: Thu, 29 Nov 2007 13:15:22 -0500
   From: "Doug Hall" <k4dsp.doug at gmail.com>
   Content-Disposition: inline

   John,
   In order to use an oscilloscope for RTTY tuning you need a terminal
   unit with mark and space filter outputs, or at the very least you need
   a couple of filters at the mark and space frequencies that can be
   connected to the X and Y inputs of the scope. And you need to set your
   scope to X vs. Y mode. Just about any old oscilloscope will do fine -
   in fact you don't need one with triggered sweep since you aren't using
   the sweep generator at all.

   But honestly, I wouldn't bother. I used an oscilloscope for RTTY
   tuning for many years, but gave it up back when I started using
   software modems. I have not missed it. The tuning scope in the program
   I use (cocoaModem running under Mac OS X) is excellent.

   73,
   Doug, K4DSP

   On Nov 29, 2007 12:20 PM, John MacFarlane
   <John.MacFarlane at metrovancouver.org> wrote:
   > Are 'hardware' oscilloscopes commonly used these days for tuning and
   > monitoring RTTY signals - is it essential or nice to have? I know that
   > some software has a proxy scope that can be displayed on a computer
   > screen but from time to time I see references to the use of test
   > equipment.
   >
   >
   >
   > Is a piece of hardware 'better' for tuning-in a signal than doing it by
   > eye on the computer screen - or relying on a software scope?
   >
   >
   >
   > How is the oscilloscope actually connected to the system to monitor the
   > signal - is it a 'hard' connections? I'm a relatively new ham so please
   > don't take knowledge for granted in response - many thanks 73
   >
   >
   >
   > John VE7AXU / VA7PX
   >
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