CIS MFSK-16 XPB

From Signal Identification Wiki
Jump to: navigation, search

CIS MFSK-16 XPB
XPB4 b.png
Frequencies 10 MHz,20 MHz,4.4 MHz
Frequency Range 4.4 MHz - 20 MHz
Mode USB
Modulation MFSK
ACF
Emission Designator
Bandwidth 2.8 kHz
Location Russia
Short Description Enigma designation XPB is a custom 16-tone MFSK mode said to have origin from Russian Intelligence and Foreign Ministry stations.
I/Q Raw Recording Download file
Audio Sample

Enigma designation XPB is a custom 16-tone MFSKMultiple Frequency Shift-Keying mode which is believed to be used by Russian intelligence.

The signal occupies about 2.8 kHzKiloHertz (kHz) 10^3 Hz of bandwidth, but the first tone is about 500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). away from the designated transmission frequency, making the total bandwidth about 3.3 kHzKiloHertz (kHz) 10^3 Hz.

A 13-tone variant [1] and slower transfer rate modes [2][3] exist but it's not known if they use the same signal format or are used for the same purpose.


Frequencies[edit]

XPB transmissions occur on numerous frequencies between 10 MHzMegaHertz (MHz) 10^6 Hz and 20.1 MHzMegaHertz (MHz) 10^6 Hz. Frequencies between 4.4 MHzMegaHertz (MHz) 10^6 Hz and 10 MHzMegaHertz (MHz) 10^6 Hz have also been used, but it's not known if they are used since 2022.


Video Examples[edit]

Additional Links[edit]

Notes[edit]

  1. https://www.youtube.com/watch?v=qhfSVnewopU
  2. https://www.youtube.com/watch?v=gscw4sWSmQY
  3. https://www.youtube.com/watch?v=eEd5DuR9u8Q

Additional Images[edit]