This program generates SSTV audio signals from a bitmap and saves them in a WAV or MMV file. Multiple SSTV formats and sampling rates are supported. The software can generate either a clean signal suitable for transmission, or a signal contaminated with noise, suffering from QSB, etc. - much like in Morse Runner, but with all effects carefully calibrated and measured in dB, Hz, and ms.

What it is good for

Create pre-canned SSTV messages, such as "CQ" or "73 DE", and transmit them without any SSTV software, just by playing the audio back in a media player.
Test your SSTV receiving software and see how tolerant it is to the noise, soundcard calibraion errors, receiver frequency offset, etc. Compare different receiving programs quantitatively.

How to use it

Specify the bitmap and output file name, set other parameters, and click on the Generate button.
Use only the 320x256, 24-bit BMP files.
Tick the Distort The Signal check box to enable the distortion controls.
If you enable QSB, add some noise as well. The signal is supposed to go below the noise during the QSB nulls.
To model selective fading, use the Multipath option, set a short delay of 1-2 ms and an amplitude ratio of 0 dB.
To model echo, use the Multipath option as well, but set a longer delay and a lower amplitude.