Re: mystry signal
Paul Butzi (W7PFB)
When I look at the first image I see a signal that runs from 2380 Hz to about 2850 Hz. That would be 470 Hz wide, not 5KHz.toggle quoted messageShow quoted text
Second image, same sort of signal from maybe 1375 thru 1860, again roughly 485 Hz wide.
I’m also seeing what look like psk traces which sort of confirms that bandwidth estimate based on relative scale.
It looks like some sort of multiple frequency shift keyed signal, four tones. If we knew the time scale in the image you could probably estimate the symbol rate.
Based on the repeated pattern I am taking a WAG and suggesting some sort of ALE?
73, Don’t forget to smile and have fun!