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Spectrum Painter
Draw images on a waterfall
#transmit#art#spectrum#image
Legal & safety note
Transmitting can be illegal without a licence and can interfere with safety-critical systems (aircraft, emergency services, medical devices). Only transmit on frequencies and power levels you are legally authorised to use, ideally into a shielded RF enclosure / dummy load or under an amateur-radio licence. This page is educational.
What it does
SimpleThis is a radio art trick: it sends a special signal that, when someone looks at it on a waterfall screen, shows a picture or word instead of a normal blob. It's just for fun and learning — still only on channels you're allowed to use.
How to use it, step by step
Simple- Put an image on the memory card.
- Open 'Spectrum Painter' and pick it.
- On an allowed channel, transmit and watch it appear on a waterfall.
Examples
Waterfall signature
Paint your callsign so it appears as text on a spectrogram.