[RTTY] 9X0TL

[Kok Chen]

Tom DL2RUM has posted a video screen capture of one of his 9X0TL  
sessions here:

http://groups.yahoo.com/group/cocoamodem/message/610

Again, it is similar to his VP2MUM recordings, but you only hear a  
single signal from the waterfall this time, instead of the entire  
waterfall cacophony.

Since I apply a narrow and very deep (Blackman window) bandpass filter  
in cocoaModem before sending the selected signal to the RTTY  
demodulator, I figured that I might as well also send it to the  
headphones output of the computer.  You can either choose a floating  
tone pair (same pitch as the selected signal on the audio spectrum) or  
a constant tone pair (remodulated to a fixed tone pair that the user  
chooses).  Tom is using the latter option in this recording -- no  
matter where he clicks on the waterfall, you hear the same tone pair  
on the headphones.

73
Chen, W7AY