M1GEO Arduino RTTY Baudot AD9851 DDS-60 Transmitter
Channel: George Smart, M1GEO
Date: 2012-02-12

http://www.george-smart.co.uk/wiki/Arduino_RTTY

A proof of concept for my Arduino RTTY transmitter. This device uses an Arduino to control a DDS-60 (Analog Devices AD9851) DDS IC, which in turn creates the required frequencies to transmit RTTY at 45.45 baud (approx) with 170 Hz shift.  The code is available on my homepage.