Agilent Technologies ESG series, User And Programming Manual, Page: 40 / 446

2-12 Real-Time I/Q Baseband Generator User’s and Programming Guide
Using Functions HP ESG Family Signal Generators
Mapping Custom Differential Encoding Options UN8 and 202
2. Press
Configure Differential Encoding
. This opens the differential state map editor. You
are now prepared to create a custom differential encoding for the user-defined default
4QAM I/Q modulation.
Editing the Differential State Map
The editor functions in the same manner as the I/Q and FSK table editors (explained in
“
Mapping Symbol Positions with the I/Q Table Editor ” on page 2 -15 and “ Building a
Customized FSK Modulation with the FSK Table Editor ” on page 2 -22).
The following illustration shows the differential state map editor, along with the location
of the data listing and the symbol table offset values entry area.
1. To encode the first symbol, add a symbol table offset of 1 by pressing
1
>
Enter
. This will
rotate forward through the state map by 1 value when a data value of 0 is modulated.
Data Symbol table offset values entry area
Cursor prepared for next entry
UNSTORED condition