EXFO PSO-200 Optical Modulation Analyzer - Manual (Page 258)

Modulation Schemes
250 PSO-200
16-QAM 4
Modulation
Format
Bits/
Symbol
Constellation
Chart
Default
Implementation
Mapping
MZM π/2
MZM
MZM π/2
MZM
I
Q
I
Q
X 0
X 1
X 2
X 3
Attn
B
3
B
2
B
1
B
0
I Q
0 0 0 0 -1 -1
0 0 0 1 .333 -1
0 0 1 0 -1 .333
0 0 1 1 .333 .333
0 1 0 0 -.333 -1
0 1 0 1 1 -1
0 1 1 0 -.333 .333
0 1 1 1 1 .333
1 0 0 0 -1 -.333
1 0 0 1 .333 -.333
1 0 1 0 -1 1
1 0 1 1 .333 1
1 1 0 0 -.333 -.333
1 1 0 1 1 -.333
1 1 1 0 -.333 1
1 1 1 1 1 1