Possible digisonde or other sounder 8p4

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Possible digisonde or other sounder 8p4
Possible digisonde 1.png
Frequencies 8 MHz,9 MHz
Frequency Range 8 MHz - 9 MHz
Mode AM
Modulation Pulsed
Bandwidth 55 kHz
Location Worldwide
Short Description Some kind of a sounder that steps through frequencies. Resembles digisonde but has some differences.
I/Q Raw Recording
Audio Sample

This is some kind of a sounder that resembles Digisonde, but it has some differences. Unlike the available Digisonde examples, this signal seems to be pulsed with 40 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). pulse frequency, and there may be slight FMFrequency Modulation on pulse. Bandwidth is 50 kHzKiloHertz (kHz) 10^3 Hz or more but it's hard to determine accurately. Frequency step seems to be 30 kHzKiloHertz (kHz) 10^3 Hz, at least in this example.

If this is positively identified as Digisonde, the information on this page can be merged into the original page.


USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) sample, 20 kHzKiloHertz (kHz) 10^3 Hz bandwidth

Raw baseband sample available:
(recorded in SDR++)


Frequency range is not known.

Video Examples[edit]

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