TrueTTY description
A program for amateur radio digital communications via a sound card.

A program for amateur radio digital communications via a sound card.

Supported modes are RTTY (Baudot code), ASCII (7 or 8 bits), PSK31 (BPSK and QPSK), BPSK63, AMTOR-FEC (SITOR-B, NAVTEX), MultiFSK-16, MultiFSK-8. HF-PACKET and UHF-PACKET (AX25) are supported in KISS-TNC emulation mode.

SELFEC SITOR, AMTOR-ARQ (SITOR-A) and DTMF-code decoding is also possible. No additional hardware is required.

A simple circuit for PTT-control can be used. It is fast and convenient to use with many macros for transmitting. Can integrate with AALog logger.

With TrueTTY you will be able to initiate radio digital communications by using a sound card.

The working area of the program is divided into several windows, the sizes of which can be changed by the user by dragging the borders.

In the top window the current spectrum of a signal (blue line) and a peak detector of spectral components (green line) are shown. The vertical red lines in this window show the working frequencies of the RX filters. In most modes you see two vertical line; in PSK modes - only one. To change the center frequency, click on the desired frequency (probably between the peaks). In MultiFSK mode mouse click defines lowest radio frequency, not center one.

The short thick black lines show TX frequencies. In PSK modes you see only one TX frequency. To change the TX frequency, click on the desired frequency by right mouse button (or the left mouse button with "Ctrl" key pressed).

Ruler under top window shows frequencies of sound spectrum. RX and TX frequencies and shifts are also shown in the status line.

Requirements:

· Pentium-100 or better, sound card


Limitations:

· Nag screen