вторник, 6 октября 2009 г.

FSK: "AKULA" Russian NAVY.

"AKULA" Russian NAVY.
FSK-2, Shift-1000, Br-500
Author: SergUA6
Band Width ~1800 Hz
Low Range ~500-600 Hz, shift is possible, recieving in SSB
Baud Rate 500 Hz
Count of Carriers 2
Step between carriers 1000 Hz
RX mode SSB

Sonograms:

pic.1

pic.2

Diagrams:
pic.3

Russian CIS NAVY "AKULA" - The signal of Russian communication system "AKULA". It is applied in the Navy. It is old enough system, the transfer is enciphered.
The features of this system: the preamble begins with doubled "plus" by duration, the rating/spacing is precisely equal to the doubled speed of manipulation, and the manipulation is without phase rupture. SHARK is translation for Russian word "AKULA".