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Chapter 6 131
Custom Arb Waveform Generator
Working with Filters
real-time waveform generation, and 512 symbols for arbitrary waveform generation. The number of
symbols equals the number of coefficients divided by the oversample ratio.
9. Press
More (1 of 2) > Display FFT (fast Fourier transform).
A graph displays the fast Fourier transform of the current set of FIR coefficients. The signal generator
has the capability of graphically displaying the filter in both time and frequency dimensions.
10. Press
Return > Display Impulse Response.
A graph shows the impulse response of the current set of FIR coefficients.
11. Press
Return > Load/Store > Store To File.
The Catalog of FIR Files appears along with the amount of memory available.
12. If there is already a file name occupying the active entry area, press:
Edit Keys > Clear Text
13. Using the alphabetic menu and the numeric keypad, enter NEWFIR1 as the file name.
14. Press
Enter.
The NEWFIR1 file is the first file name listed. (If you have previously stored other FIR files, additional
file names are listed below NEWFIR1.) The file type is FIR and the size of the file is 260 bytes. The
amount of memory used is also displayed. The number of files that can be saved depends on the size of
the files and the amount of memory used.