[GreenKeys] RYRY Signal plus Noise for RTTY testing enclosed

[Jim Backus]

Thanks for that - just what I need. I had my TS-2000 modified for 5 MHz 
operation and now cannot get my USB Signallink interface to work 
reliably. I also have a BARTG ST5 TU that I can test with that signal if 
it is set up for high tones.

73 / Best wishes

Jim G4PFJ

On 20/02/2016 02:25, Don Sentz via GreenKeys wrote:
> Hello,
>
> Have other folks posted  or do you use canned test signals for RTTY demodulator testing? I
>
> I made the attached 12 second long AFSK test signal using Audacity. The SNR is supposed to be +3dB. Maybe someone will find it useful for testing their RTTY demodulator performance. The SNR can be changed in 3dB steps in either direction, if anyone wants other SNRs to try.
>
> The tones are 2125Hz = mark, 2975Hz = space, @ 60WPM.
>
> The noise is the white noise generator provided in Audacity. I did not apply any filter to it.
>
> There is a 4 second mark tone followed by RYRYRY...<CR><LF> then a shorter mark tone about 1 second. I think it should print about half a line of RYs, a CR and a LF. Set your player to repeat for continuous signal.
>
> Since I do not have an RTTY demodulator yet, I cannot promise that this is a 100% correct signal as I have done a visual check only during the construction of the file. I hope someone will try it out and let me know how it works, thanks.
>
> Sorry about the large file size (.wav) I do not have MP3 encoder.
>
> -73
>
>
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