334 Chapter 10
CDMA Digital Modulation
Applying a User-Defined FIR Filter to a cdma2000 Waveform
Applying a User-Defined FIR Filter to a cdma2000 Waveform
Custom FIR filters can be created using the FIR table editor feature or they can be created externally and
downloaded into signal generator memory. Once a filter is stored in memory, you can select it for use with a
custom modulation state. This example requires that at least one FIR file already be stored in memory. For
an example of creating and storing a FIR filter, see “Creating a User-Defined FIR Filter Using the FIR Table
Editor” on page 173.
1. Press
Preset.
2. Press
Mode > CDMA > Arb CDMA2000 > More (1 of 2) > CDMA2000 Define.
3. Press
Filter > Select > User FIR.
In this example, there are two FIR files listed: NEWFIR1 and NEWFIR2. (These files were created in the
examples in Chapter 4, “Basic Digital Operation,” on page 89.)
Figure 10-16
4. Scroll down in the list until NEWFIR2 is highlighted.
5. Press
Select File.
The highlighted filter is now selected for use in your custom modulation state, as shown in Figure 10-17
on page 335.
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