Agilent Technologies E8257D PSG User Manual page 187

5. Press the
Delete Row
Repeat this pattern of steps using the following table:
...
Goto Row
0110 0000 (96)
1001 0000 (144)
1100 0000 (192)
0001 0000 (16)
0001 0100 (20)
0001 1000 (24)
0011 0000 (48)
0011 0100 (52)
0011 1000 (56)
0101 1000 (88)
0111 0000 (112)
0111 0100 (116)
0111 1000 (120)
6. Press
Display I/Q Map
created. The I/Q State Map in this example has 128 symbols.
7. Press . When the contents of an I/Q Values table have not
Return
been stored, I/Q Values (UNSTORED) appears on the display.
8. Press >
More (1 of 2)
If there is already a file name from the Catalog of IQ Files
occupying the active entry area, press the following keys:
>
Editing Keys Clear Text
9. Enter a file name (for example, 128QAM) using the alpha keys
and the numeric keypad.
10. Press .
Enter
The user–defined I/Q State Map should now be stored in the Catalog of IQ Files.
Creating a QPSK I/Q Modulation Type User File with the I/Q Values Editor
In I/Q modulation schemes, symbols appear in default positions in the I/Q plane. Using the I/Q
Values editor, you can define your own symbol map by changing the position of one or more
symbols. Use the following procedure to create and store a 4–symbol unbalanced QPSK modulation.
1. Press .
Preset
Chapter 6
softkey 16 times.
to view the new constellation that has been
> .
Load/Store Store To File
Press the softkey...
Delete Row
16 times
16 times
16 times
4 times
4 times
8 times
4 times
4 times
4 times
8 times
4 times
4 times
8 times
Custom Arb Waveform Generator
Working with Modulation Types
173