I am new to the world of SSTV, but after a night of fiddling and reading I got this result:
https://youtu.be/Y0ezz8zcOa8
On this forum I was able to find the manual, which confirms what I had already gathered:
- 8s (8 seconds, althought it might also be 7 seconds as that is pal 50hz)
- 120×120 pixels (I have seen mentions of 128x128 as well)
- 15 lines per second, to make 120 lines in 8 seconds
- The vertical sync pulse has a duration of 30ms, and the horizontal sync pulse duration is just 5ms
- The sync frequency is 1200Hz, and black and white interpolate between 1500Hz and 2300Hz
- The aspect ratio is 1:1 (to match the usual oscilloscope tubes of the day)
I really want to show off the Robot 70A in a video I am doing about BASICODE (I saw the inventor of BASICODE is active here as well!). Does anyone know how to convert an image to a WAV file that the Robot 70A can decode?