21 October 2015

MFSK-4 150Bd 4000Hz (CIS FTM-4)

CIS FTM-4 unknown Russian "domestic" system: MFSK-4, speed 150Bd, Shift 4000Hz and CCF ~80 ms. Heard on 16343.0 and 16222.0 KHz cf (16335.0 and 16230.0 f0 USB). This signal is discussed here in radioscanner.ru: http://signals.radioscanner.ru/base/signal201/
At least in this sample, the start tone is the higher one while the ending tone is the lower.

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