Дело не только в ACF=70, хотя есть и она (см. ниже), а в «
точках», которые идут со скоростью 36 baud, а затем 50 baud traffic, который передают кодом 7 bit 3:4.
ACF=70:
1010101010101010101010101011101011111010110100000101000001100110110011
1101010101001111110000101101010101111100011001100101010110111000111001
1101010101001111110000101101010101111100011001100101010110111000111001
В дополнение даю источник, где можно посмотреть про этот сигнал и чем его брать (но там все закрыто):
описание от http://www.wavecom.ch
CIS-36-50
Frequency range VLF, HF
Speed 36, 50, 75, 100, 150 Baud
Modulation FSK
Receiver settings DATA, CW, LSB or USB
Additional Info
CIS 36-50, also known as BEE-36 or T600, is a synchronous system used by the Russian navy.
Usually a 36 baud idle sequence is transmitted, followed by 50 baud traffic.
All traffic is encrypted.
A message begins with a bit synch sequence and a start-of-message preamble. Message data is sent with a 7 bit 3:4 ratio alphabet and ending with an end of transmission sequence containing at least 4 end-of-transmission characters.
The length of a message is variable. If a transmission contains more than one message, the start of message sequence is left out between messages.
Occasionally traffic with call signs in FSK CW is transmitted
описание от http://www.hoka.net
BEE / 36-50 / T600
It is a synchronous bit stream system most often found running at 50bd with no apparent ACF. When idling at 36 bd it shows an ACF=2 and as it switches from 36bd to 50bd a preamble can be detected running with ACF=70. The system appears to be synchronous with 1 stop bit and common shifts of 85Hz, 125Hz, 250Hz and sometimes 500Hz having been recorded Commonly found on the HF spectrum it is used mainly by the Russian Navy and Polish Mil.
