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.

PSK: Arcotel MAHRS 2400 EADS/RACOMS PSK-8, ALE

Arcotel MAHRS 2400 EADS/RACOMS
PSK-8, ALE

Author: SergUA6 6.0
Band Width ~2800-2900 Гц
Low Range 300-400 Гц
Baud Rate 2400 Гц
n-Ary PSK/MPSK PSK-8
Carrier frequency 1800 Гц
RX mode SSB

The signal is here

Sonograms:

pic.1 General view

pic.2 Manipulation speed

Pictures

pic.3 Phase constellation

ARCOTEL MAHRS 2400 EADS/RACOMS - It Sounds similar to one of LINK-11 variants, so it is possible to confuse these two signals.
At attentive studying it is visible that it is psk-8 serial. on such short signals it is difficult to receive the qualitative picture on the phase plane, but if to run whole file, that all is easily clarified. The presence of the short PSK-2 fragments in the begining of each pachcage with duration 60 m, is is typical.