Serdolik

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Serdolik
Crowd 36thmb.jpg
Frequencies 3 MHz,30 MHz
Frequency Range 3 MHz - 30 MHz
Mode USB
Modulation MFSK
ACF
Bandwidth 1.4 kHz
Location Russia
Short Description Serdolik is a MFSK signal used by the Russian diplomatic service.
I/Q Raw Recording
Audio Sample

Serdolik is a MFSKMultiple Frequency Shift-Keying signal used by the Russian diplomatic service.

This signal consists of a 34-tone MFSKMultiple Frequency Shift-Keying signal at 40 bdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second.. This mode is currently mainly used for link establishment, whereas the actual traffic is passed using an OFDMOrthogonal Frequency-Division Multiplexing waveform.

Samples[edit]

Sample beginning of transmission:

5 Figure Coded Groups:

5 Letter Coded Groups:

Serdolik Various Modes
IRSInformation Receiving Station in an ARQ link (The station receiving information from the ISS. Will send RQ's (Repeat Request) to let the ISS know the information was received successfully. (ARQAutomatic Repeat reQuestAutomatic Repeat Query response) Tonecall 10 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. Manual
CROWD36 IRS mode.jpg
CROWD36 Tonecall.jpg
10bdCROWD36.jpg

Video Examples[edit]

Software Decoders[edit]

These can decode, but not decrypt.

Hobby Level Software


Professional Equipment/Software

Additional Links[edit]

Additional Images[edit]