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Loggings => HF Mystery Signals => Topic started by: greator on June 25, 2020, 1426 UTC

Title: Rtty looking signal 4280kHz at UTC: 1420 Europe
Post by: greator on June 25, 2020, 1426 UTC

Does anyone know what this signal is? Found it at 4280kHz, sounds a bit like RTTY, but i cant decode it like one of the ordinary RTTY modes. It transmitts for 3-4s, then pauses with only a carrier wave for 3-4s and then starts over.

(https://i.postimg.cc/mZCKnzk6/bild.png)

Title: Re: Rtty looking signal 4280kHz at UTC: 1420 Europe
Post by: Token on June 26, 2020, 0104 UTC

This is PBB, a Dutch navy station.

850 Hz shift, 75 Bd, FSK.  And it is not encrypted, you should be able to turn it to clear text.  I don't remember off the top of my head, but try 850 Hz shift, 75 Bd, 5N1

The results might look odd to you, but should be the same line repeating every transmission cycle, something like:
02A  04B  06A  08B  12A  PBB

T!