EXFO PSO-200 Optical Modulation Analyzer - Manual (Page 257)

Modulation Schemes
Optical Modulation Analyzer 249
QPSK 2 NRZ: NRZ:
RZ: RZ:
APSK 3
Modulation
Format
Bits/
Symbol
Constellation
Chart
Default
Implementation
Mapping
MZM π/2
MZM
I
Q
X0
X1
B
1
B
0
I Q
0 0 -1 -1
0 1 1 -1
1 0 -1 1
1 1 1 1
MZM π/2
MZM
I
Q
X0
X1
MZM
Carving
MZM π/2
MZM
I
Q
X0
X1
MZM
X2
B
2
B
1
B
0
I Q
0 0 0 -2.414 -2.414
0 0 1 -1 -1
0 1 0 1 1
0 1 1 2.414 2.414
1 0 0 2.414 -2.414
1 0 1 1 -1
1 1 0 -1 1
1 1 1 -2.414 2.414