Polish Intelligence 100bd/625Hz FSK

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Polish Intelligence 100bd/625Hz FSKFrequency-Shift Keying
F11.png
Frequencies 4 MHzMegaHertz (MHz) 10^6 Hz4,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
4,000 kHzKiloHertz (kHz) 10^3 Hz
,20 MHzMegaHertz (MHz) 10^6 Hz20,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
20,000 kHzKiloHertz (kHz) 10^3 Hz
4,000 kHzKiloHertz (kHz) 10^3 Hz
MHzMegaHertz (MHz) 10^6 Hz
20,000 kHzKiloHertz (kHz) 10^3 Hz
20 MHzMegaHertz (MHz) 10^6 Hz
Frequency Range MHzMegaHertz (MHz) 10^6 Hz4,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
4,000 kHzKiloHertz (kHz) 10^3 Hz
- 20 MHzMegaHertz (MHz) 10^6 Hz20,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
20,000 kHzKiloHertz (kHz) 10^3 Hz
Mode USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables)
Modulation FSKFrequency-Shift Keying
ACFAutoCorrelation Function 160 msmilliseconds (.001 of a second), 960 msmilliseconds (.001 of a second).
Bandwidth 3500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).3.5 kHzKiloHertz (kHz) 10^3 Hz
0.0035 MHzMegaHertz (MHz) 10^6 Hz
3.5 kHzKiloHertz (kHz) 10^3 Hz
0.0035 MHzMegaHertz (MHz) 10^6 Hz
3.5 kHzKiloHertz (kHz) 10^3 Hz
0.0035 MHzMegaHertz (MHz) 10^6 Hz
Location Poland
Short Description One-way broadcast system, used by one of Polish intelligence agencies for delivery of messages to their operatives abroad on fixed schedules.
I/Q Raw Recording
Audio Sample

One-way broadcast system, used by one of Polish intelligence agencies for delivery of messages to their operatives abroad on fixed schedules.

This mode has very close ties to the analogue broadcasts from the same agency, known by their ENIGMA codes E11, S11a, and M03. It always sends 15/20 minutes before them, delivering the same message that would later be sent by analogue means, on a nearby frequency. The digital broadcast also repeats 5 minutes after the first one, on the same frequency.

However, not every analogue schedule has a digital equivalent.

Samples[edit]

Null message:

Traffic:

Decoding Software[edit]

Hobby Level Software

Additional Links[edit]