Keysight Technologies 3458A Guide D'utilisation page 492

E High Resolution Digitizing With the 3458A
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Returning to the original problem, the subprograms needed to analyze the AM
modulated signal are:
Setup_dig, Wfdgtz, Wfmove, Fft, and Fft_plot.
In other words the following would be inserted as the main program:
190 CALL Setup_dig(2,20E-6,512)
200 CALL Wfdgtz (1)
210 CALL Wfmove("1","98",Scal(*),Wavf(*),Clip)
220 CALL Fft
(512,1,Hanning,Wavf(*),Real_dat(*),Imag_dat(*),Magn_dat(*))
240 CALL
Fft_plot(Magn_data(*),Smpl_intvl,Dyn_range,F_start,F_stop,Title$)
250 END
The results of this program are shown in
492
DISP
OUTPUT I USING "@" ! Clear CRT
!
CALL Init58
!
GINIT
!
! Insert user main program here
! to here
END
! Clear display line
! Wake up the bus
! Initialize graphics
Figure E-10.
Keysight 3458A User's Guide