This is a recording I made off the air of RTTY at 45.4545.. Baud
or 60 WPM. The sender seems to be typing
at about 40 WPM and the TNC pauses and gives the "Wait" or "Diddle"
tones frequently. The diddle tone
sounds much better than a continuous tone and also lets the receiving TNC
maintain synchronization.
The tones are "High" , 2125 Mark and 2295 Space in Hertz. In
Europe, low tones near 1300 Hz are popular.