Agilent Technologies E4428C, User Manual, Page: 217 / 700

Chapter 4 193
Basic Digital Operation
User-Defined FSK Modulation
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. For instructions on storing the file,
see the next section.
Storing an FSK Modulation
In this example, you learn how to store an FSK modulation. If you have not created an FSK
modulation, complete the steps in the previous section,
“Modifying a Default FSK Modulation” on page
192 .
1. 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
2. Enter a file name (for example,
NEWFSK
) using the alpha keys and the numeric keypad.
3. Press
Enter
.
The user-defined FSK modulation is now stored in the
Catalog of FSK Files
.
Creating a User-Defined FSK Modulation
Accessing and Clearing the Table Editor
1. Press
Preset
.
2. Perform the following keypress sequence required for your format type.
For Custom Format
Press
Mode
>
Custom
>
Real Time I/Q Base Band
>
Modulation Type
>
Define User FSK
>
More (1 of 2)
>
Delete All Rows
>
Confirm Delete All Rows
.
For TMDA Formats
Press
Mode
>
TDMA
>
desired format
>
More (1 of 2)
>
Modify Standard
>
Modulation Type
>
Define User FSK
>
More (1 of 2)
>
Delete All Rows
>
Confirm Delete All Rows
.
This accesses the
Frequency Values
table editor and clears the previous values.
Entering Frequency Deviation Values
1. Press
600
>
Hz
.
2. Press
1.8
>
kHz
.