Manual

Modulation Schemes

248 PSO-200

For simplicity purposes, transitions corresponding to higher-order formats

are not illustrated here. The symbol mapping, {B

}'{I,Q}),

depends on the specific implementation, and there are several possible

implementations for most modulation formats.

The PSO-200 default implementation and mapping of each modulation is

shown in the table below. To implement a different mapping, you must edit

the Gearbox configuration file as explained in Performing Detailed Bit

Pattern Analysis with the Gearbox on page 87.

Modulation

Format

Bits/

Symbol

Constellation

Chart

Default

Implementation

Mapping

CW –

No modulation

–

OOK 1

Remark: M = x-cut or

z-cut MZ biased at /4

BPSK 1

Remark: M = x-cut

MZ biased at 0

MZM

I Q

00 0

11 0

MZM

I Q

0-1 0

11 0