Chapter 4 171
Basic Digital Operation
Using Customized Burst Shape Curves
Storing a User-Defined Burst Shape Curve
1. Press Define User Burst Shape > More (1 of 2) > Load/Store > Store To File.
If there is already a file name from the Catalog of SHAPE Files occupying the active entry
area, press the following keys:
Editing Keys > Clear Text
2. Enter a file name (for example, NEWBURST) using the alpha keys and the numeric keypad.
The maximum file name length is 23 characters (alphanumeric and special characters).
3. Press
Enter.
The contents of the current Rise Shape and Fall Shape table editors are stored to the Catalog of
SHAPE Files. This burst shape can now be used to customize a modulation or as a basis for a new burst
shape design.
Recalling a User-Defined Burst Shape Curve
Once a user-defined burst shape file is stored in memory, it can be recalled for use with real-time I/Q
baseband generated digital modulation.
This example requires a user-defined burst shape file stored in memory. If you have not created and stored a
user-defined burst shape file, complete the steps in the previous sections, “Creating a User-Defined Burst
Shape Curve” on page 168 and “Storing a User-Defined Burst Shape Curve” on page 171.
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 > Burst Shape > Burst Shape Type > User File.
For TMDA Formats
Press
Mode > Real Time TDMA > desired format > More (1 of 2) > Modify Standard >
Burst Shape > Burst Shape Type > User File.
3. Highlight the desired burst shape file (for example, NEWBURST).
4. Press
Select File.
The selected burst shape file is now applied to the current real-time I/Q baseband digital modulation
state.
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