PSK: Arcotel Farcos 1800 EADS/RACOMS psk-4, ALE

Arcotel Farcos 1800 EADS/RACOMS psk-4, ALE.

Author: SergUA6 6.0
Band Width ~2200-2400 Hz
Low Range 500-600 Hz
Baud Rate 1800 Hz
n-Ary PSK/MPSK PSK-4
Carrier frequency 1600 Hz is standard, in this example carrier frequency is 1648 Hz
RX mode SSB

The signal is here.

Sonograms:

pic.1 General view

pic.2 Speed

Pictures:
pic.3 Phase constellation

ARCOTEL FARCOS 1800 EADS/RACOMS - this signal is from the same series as ARCOTEL MAHRS 2400 EADS/RACOMS, but it has other PSK mode, a little bit shorter bursts and slower speed. The presence of header with psk-2 duration about 70 msec is characteristic.