Kathrein MSK 33 - Manual (Page 75)

Const Menu
75
Examples for QPSK constellation diagrams
QPSK signal without faults
QPSK signal with phase noise (LNC)
QPSK signal with intermodulation noise
QPSK signal with superposed broadband
noise. Possible cause: Defective amplifier
or high cable loss.
QPSK signal with amplitude hum of an amplifier