Agilent X-Series Signal Generators User’s Guide 221
Basic Digital Operation (Option 653/655/656/657)
Modifying a FIR Filter Using the FIR Table Editor
Loading the Default Gaussian FIR File
Figure 8-23 Loading the Default Gaussian FIR File
1. Press Preset.
2. Press Mode > Dual ARB > Arb Setup > More > Real-Time Modulation Filter > Define User FIR > More > Load
Default FIR > Gaussian.
3. Press Filter BbT > 0.300 > Enter.
4. Press Filter Symbols > 8 > Enter.
5. Press Generate.
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.
6. Press Display Filter > Display Impulse Response (refer to Figure 8- 24).
Mode > Dual ARB > Arb Setup > More > Real-Time
Modulation Filter
These softkeys select a
window function
(apodization function) for
a filter.
For details on each key, use key help as described on page 44.
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