CIS MFSK-16 XPA2

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CISCommonwealth of Independent States (CIS), the former Soviet Republic MFSKMultiple Frequency Shift-Keying-16 XPA2
XPA2.png
Frequencies 3 MHzMegaHertz (MHz) 10^6 Hz3,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
3,000 kHzKiloHertz (kHz) 10^3 Hz
,30 MHzMegaHertz (MHz) 10^6 Hz30,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
30,000 kHzKiloHertz (kHz) 10^3 Hz
3,000 kHzKiloHertz (kHz) 10^3 Hz
MHzMegaHertz (MHz) 10^6 Hz
30,000 kHzKiloHertz (kHz) 10^3 Hz
30 MHzMegaHertz (MHz) 10^6 Hz
Frequency Range MHzMegaHertz (MHz) 10^6 Hz3,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
3,000 kHzKiloHertz (kHz) 10^3 Hz
- 30 MHzMegaHertz (MHz) 10^6 Hz30,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
30,000 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 MFSKMultiple Frequency Shift-Keying
ACFAutoCorrelation Function
Bandwidth 250 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).0.25 kHzKiloHertz (kHz) 10^3 Hz
2.5e-4 MHzMegaHertz (MHz) 10^6 Hz
0.25 kHzKiloHertz (kHz) 10^3 Hz
2.5e-4 MHzMegaHertz (MHz) 10^6 Hz
0.25 kHzKiloHertz (kHz) 10^3 Hz
2.5e-4 MHzMegaHertz (MHz) 10^6 Hz
Location Russia
Short Description Enigma Designation XPA2, also known as MFSKMultiple Frequency Shift-Keying-16, CISCommonwealth of Independent States (CIS), the former Soviet Republic MFSKMultiple Frequency Shift-Keying-14, and CISCommonwealth of Independent States (CIS), the former Soviet Republic MFSKMultiple Frequency Shift-Keying-16, is a 14-tone MFSKMultiple Frequency Shift-Keying signal said to have origin from Russian Intelligence and Foreign Ministry stations.
I/Q Raw Recording
Audio Sample
Enigma Designation XPA2, also known as MFSKMultiple Frequency Shift-Keying-16, CISCommonwealth of Independent States (CIS), the former Soviet Republic MFSKMultiple Frequency Shift-Keying-14, and CISCommonwealth of Independent States (CIS), the former Soviet Republic MFSKMultiple Frequency Shift-Keying-16, is a 14-tone MFSKMultiple Frequency Shift-Keying signal said to have origin from Russian Intelligence and Foreign Ministry stations.

XPA2 has a very unique preamble sequence, and a lower "sync" tone every 5 tones (numbers) that other MFSKMultiple Frequency Shift-Keying systems don't have. The preamble sequence can go on for a very long time before the actual message starts. XPA2 transmits 5 number groups of unknown meaning. XPA2 uses 7.5 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. and uses 15 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). shifts between tones occupying 250 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). of bandwidth. XPA2 was first seen on May of 2006 and has been active ever since.


Although XPA2 uses 14 tones, its spacing suggests 16 possible tones, but two tones are always unused.


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Hobby Level Software
Professional Equipment/Software

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