
Chapter 8 237
CDMA Digital Modulation
Applying a User-Defined FIR Filter to a cdma2000 Waveform
Figure 8-17
The filter you selected is NEWFIR2. You can see the name displayed below the
Select
softkey. In the Filter field, near the left of the display, User FIR is displayed to indicate
that a user-defined FIR filter has been selected.
Once you have set the other modulation parameters to your satisfaction, turn on Custom
and the RF output and your user-defined filter is in use.
NOTE The actual oversample ratio during modulation is automatically selected by the
instrument. A value between 4 and 16 is chosen dependent on the symbol rate,
the number of bits per symbol of the modulation type, and the number of
symbols.
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