CIS MFSK-68
| CISCommonwealth of Independent States (CIS), the former Soviet Republic Modes | |
|---|---|
| CIS-11* - CIS-12 - CIS-14* - CIS-16* - CIS-20 - CIS MFSK-20 XPA - CIS MFSK-16 XPB - CIS-36-50 - CIS-40.5* - CIS-48 - CISCommonwealth of Independent States (CIS), the former Soviet Republic MFSKMultiple Frequency Shift-Keying-68 - CIS 3xBaudot-50 VFT* CIS 3x100 VFT* - CIS-112 - CIS-128 - CIS 3x144 VFT* - CIS-300* - CIS-1280* - CIS-3000 - CIS-8181* - CIS OFDM HDR Modem - Russian Diplo VFT PSK 64Bd* *Inactive |
 | |
|---|---|
| Frequencies | 7.659 MHz,18.28 MHz |
| Frequency Range | 7.659 MHz - 18.28 MHz |
| Mode | USB |
| Modulation | MFSK,PSK |
| ACF | — |
| Emission Designator | — |
| Bandwidth | 10 kHz |
| Location | Russia |
| Short Description | New Russian MFSK Modem that uses 68 MFSK (5 tones at a time) as well as a 9000 Bd 8-PSK insert every second which spans 10 kHz wide. This signal is often found attributed with CIS-3000, where CIS-3000 acts as the ALE for this signal as well as CIS-128. It is used by Russian diplomatic services and known with the unofficial name "Perelivt". |
| I/Q Raw Recording | Download file |
| Audio Sample | |
Also known as Perelivt, this is a relatively new Russian MFSKMultiple Frequency Shift-Keying Modem that uses 68 MFSKMultiple Frequency Shift-Keying (5 tones per symbol) as well as a 9000 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. 8-PSK8-Phase Phase-Shift Keying (3 bits per symbol) insert every second which spans 10 kHzKiloHertz (kHz) 10^3 Hz wide. This signal is used by Russian diplomatic services and it is often found attributed with CISCommonwealth of Independent States (CIS), the former Soviet Republic-3000, where CIS-3000 acts as the ALEAutomatic Link Establishment for this signal as well as CIS-128. It has also been seen precluding a Mazielka (X06) selcall. They may be sent from the same modem.
The MFSKMultiple Frequency Shift-Keying uses 68 tones at 100 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. or 50 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second.. The MFSKMultiple Frequency Shift-Keying portion lasts 960 msmilliseconds (.001 of a second), and the PSKPhase-Shift Keying insert lasts 40 msmilliseconds (.001 of a second), so a single frame is exactly 1 second long. The 8-PSK8-Phase Phase-Shift Keying (3 bits per symbol) insert transmits at 9000 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second., so roughly 1440 bits are transmitted each time the PSKPhase-Shift Keying insert happens.
The number of tones has also been said to be 64 or 66 depending on the source. It is not known if there are different variants or operating modes of this signal.
Frequencies[edit]
Spotted at:
- 7659 kHzKiloHertz (kHz) 10^3 Hz
- 10367 kHzKiloHertz (kHz) 10^3 Hz
- 13441 kHzKiloHertz (kHz) 10^3 Hz
- 16107 kHzKiloHertz (kHz) 10^3 Hz
- 18280 kHzKiloHertz (kHz) 10^3 Hz
Video Examples[edit]
Additional Links[edit]
- RadioScanner.RU Discussion on CIS MFSK-68
- Priyom: Perelivt
- i56578-swl: CIS-3000 and MFSK-64 combined (Note: Earlier title had MFSKMultiple Frequency Shift-Keying-68 in it.)
- i56578-swl: CIS MFSK-64 (32+32) 45Bd (The MFSKMultiple Frequency Shift-Keying-64 vs 68 difference is discussed.)
Additional Images[edit]
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