CIS-48

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CISCommonwealth of Independent States (CIS), the former Soviet Republic-48
CIS-48.jpg
Frequencies 16459 kHzKiloHertz (kHz) 10^3 Hz16,459,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
16.459 MHzMegaHertz (MHz) 10^6 Hz
,17289 KHzKiloHertz (kHz) 10^3 Hz17,289,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
17.289 MHzMegaHertz (MHz) 10^6 Hz
,17234 KHzKiloHertz (kHz) 10^3 Hz17,234,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
17.234 MHzMegaHertz (MHz) 10^6 Hz
,5017 kHzKiloHertz (kHz) 10^3 Hz5,017,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
5.017 MHzMegaHertz (MHz) 10^6 Hz
5,017 kHzKiloHertz (kHz) 10^3 Hz
5.017 MHzMegaHertz (MHz) 10^6 Hz
17,289 kHzKiloHertz (kHz) 10^3 Hz
17.289 MHzMegaHertz (MHz) 10^6 Hz
Frequency Range 5.017 MHzMegaHertz (MHz) 10^6 Hz5,017,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
5,017 kHzKiloHertz (kHz) 10^3 Hz
- 17.289 MHzMegaHertz (MHz) 10^6 Hz17,289,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
17,289 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 PSKPhase-Shift Keying
ACFAutoCorrelation Function
Bandwidth 2000 kHzKiloHertz (kHz) 10^3 Hz2,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
MHzMegaHertz (MHz) 10^6 Hz
,3000 kHzKiloHertz (kHz) 10^3 Hz3,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
MHzMegaHertz (MHz) 10^6 Hz
2,000 kHzKiloHertz (kHz) 10^3 Hz
MHzMegaHertz (MHz) 10^6 Hz
3,000 kHzKiloHertz (kHz) 10^3 Hz
MHzMegaHertz (MHz) 10^6 Hz
Location Russia
Short Description CISCommonwealth of Independent States (CIS), the former Soviet Republic-48 is an interesting data mode with a unique format. It uses a 4 DBPSK Preamble with a constant tone and changing OFDMOrthogonal Frequency-Division Multiplexing modes as it transmits data. Origin is suspected to be in Russia.
I/Q Raw Recording Download file
Audio Sample
CISCommonwealth of Independent States (CIS), the former Soviet Republic-48 is an interesting data mode with a unique format. It uses a 4 DBPSK preamble with a constant tone and changing OFDMOrthogonal Frequency-Division Multiplexing modes as it transmits data. Origin is suspected to be in Russia.

The first part of the transmission, the "Channel marker/beacon", is comprised of 4 DBPSK carriers, each pair spaced 500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). apart, with 700 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). spacing within the pair. Each DBPSK carrier runs at 50 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second., and usually has the tone interrupt up to two times during the transmission, possibly indicating a different type of data being transmitted or codeword. Sometimes this beacon repeats during the transmission, or it may solely repeat without any data.

If there is data, after the beacon it will start transmitting a series of OFDMOrthogonal Frequency-Division Multiplexing waveforms, each ~3440 msmilliseconds (.001 of a second) long, and often changing the OFDMOrthogonal Frequency-Division Multiplexing waveform. The bandwidth of these waveforms range from ~2 kHzKiloHertz (kHz) 10^3 Hz to ~3 kHzKiloHertz (kHz) 10^3 Hz, and between these waveforms is a constant sinusoid tone.


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