Agilent Technologies E8267D PSG User Manual
Page 190
176
Chapter 6
Custom Arb Waveform Generator
Working with Modulation Types
6.
Press
–1.8
>
kHz
.
Each time you enter a value, the Data column increments to the next binary number, up to a
total of 16 data values (from 0000 to 1111). An unstored file of frequency deviation values is
created for the custom 4–level FSK file.
7.
Press
Load/Store
>
Store To File
.
If there is already a file name from the Catalog of FSK Files occupying the active entry
area, press the following keys:
Edit Keys
>
Clear Text
8.
Enter a file name (for example, NEWFSK) using the alpha keys and the numeric keypad.
9.
Press
Enter
.
The user–defined FSK modulation should now be stored in the Catalog of FSK Files.
Modifying a Predefined FSK Modulation Type User File with the Frequency Values Editor
Using the Frequency Values editor, you can define, modify, and store user–defined frequency shift
keying modulation. The Frequency Values editor is available for custom Real–Time I/Q Baseband
mode, but is not available for waveforms generated in custom Arb Waveform Generator mode. Use
this example to learn how to add errors to a default FSK modulation.
1.
Press
Preset
.
2.
Press
Mode
>
Custom
>
Real Time I/Q Baseband
>
Modulation Type
>
Define User FSK
>
More (1 of 2)
>
Load Default
FSK
.
3.
Press
Freq Dev
>
1.8
>
kHz
.
4.
Press
4–Lvl FSK
.
This sets the frequency deviation and opens the Frequency Values editor with the 4–level FSK
default values displayed. The frequency value for data 0000 is highlighted.
5.
Press
–1.81
>
kHz
.
6.
Press
–590
>
Hz
.
7.
Press
1.805
>
kHz
.
8.
Press
610
>
Hz
.
As you modify the frequency deviation values, the cursor moves to the next data row. An
unstored file of frequency deviation values is created for your custom 4–level FSK file.
9.
Press
Load/Store
>
Store To File
.
If there is already a file name from the Catalog of FSK Files occupying the active entry
area, press the following keys:
Edit Keys
>
Clear Text
10. Enter a file name (for example, NEWFSK) using the alpha keys and the numeric keypad.
11. Press
Enter
.
The user–defined FSK modulation should now be stored in the Catalog of FSK Files.