Blaster TeLetype modulates and demodulates non-encrypted Baudot Radio Teletype (RTTY) found on the short wave bands, and provides a multi featured, user friendly user interface. BTL uses a Sound Blaster compatible sound card and your PC to demodulate RTTY audio tones from an SSB radio receiver, and generates audio tones for an SSB radio transmitter. BTL uses the PC to perform modern DSP processing, giving outstanding demodulation performance, and to provide clean, sinusoidal, and phase continuous tones for transmission. BTL has many features including extensive on-line help. The help describes all the features available in BTL, and gives additional information on getting BTL to work on your PC. You can run BTL with or without a sound card to access this help. Press F1 when you see the main screen in BTL. If you still have problems or just want to know a little more about BTL, you can read the FAQ and Trouble Shooting Guide, FAQ.TXT BTL is a DOS program and requires a 80386DX based IBM PC compatible or better to run. To decode or generate RTTY you will also need a Sound Blaster 1.0 or greater, compatible sound card and of course a SSB receiver or transceiver. BTL sometimes works in a DOS box under Windows, however NO ATTEMPT has been made to make BTL work under Windows, so all credit must be given to Microsoft! Initial BTL defaults are set to the European standard of USB and 1275/1445 Hz. It is easy to change these default to the US standard or and other standard. Refer to the on-line help or FAQ. BTL will save these new defaults in the config file for the next time you run BTL.
