Similar to XPB polytone

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Similar to XPB polytone
Frequencies 4.603 MHz,4.618 MHz
Frequency Range 4.603 MHz - 4.618 MHz
Mode USB
Location Silec, Poland
Short Description A strange polytone (?) that is very short and occurs randomly.
I/Q Raw Recording
Audio Sample

I observed it at multiple frequencies at different times: For 4618 kHzKiloHertz (kHz) 10^3 Hz, I found that they transmit in pairs, one a little over a minute after the other, though I only recorded the times (UTC) 01:53, 01:54, and 02:41. It switched to 4603 kHzKiloHertz (kHz) 10^3 Hz, where it did not send pairs. (UTC) 02:05 and 02:19. Tuesday, Mar 10. 2020. Because of the location and how close it is to the Buzzer, I would assume it is Russian.

I am fairly certain that this signal is ALE which is used all over the world. - Tinkell (Mar. 10th)


This sample is from 4618 kHzKiloHertz (kHz) 10^3 Hz UTC 02:05 , sample to the side is at 4603 kHzKiloHertz (kHz) 10^3 Hz UTC 01:53.


4618 kHzKiloHertz (kHz) 10^3 Hz, 4603 kHzKiloHertz (kHz) 10^3 Hz

Additional Images[edit]