Performing Power Spectrum Computation (Fft) - YOKOGAWA DL7440 User Manual
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- User manual (55 pages) ,
- User manual (176 pages) ,
- Operation manual (29 pages)
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9.6
Performing Power Spectrum Computation
(FFT)
Procedure
SETUP
MEASURE
MENU
PRINT
HISTORY
Setting the Equation, Scaling, Unit, Smoothing, Computation Start Point, the
Number of Computed Points, and Time Window
9-12
X-Y
DISPLAY
FILE
MISC
RESET
PHASE
CURSOR
GO/NOGO
MATH
MENU
IMAGE SAVE
SHIFT
ACQ
START/STOP
Note
•
If the user-defined computation option is installed, you must first enter normal computation
mode as described in section 9.1.
•
The setup procedures for computed waveform Math1 are described below. Perform similar
steps for Math2.
1.
Press the Math1 Setup soft key. The Math1 Setup dialog box opens.
2.
Use jog shuttle & SELECT to select the power spectrum computation operator
PS and the waveform on which to perform computation.
When the Math1 Setup dialog box is closed by pressing ESC or another key, the
specified equation appears in the Math1 Setup menu column.
3.
Use jog shuttle & SELECT to set the scaling, unit, computation start point, the
number of computed points, and the time window of computed waveform Math1.
4.
Press ESC. The Math1 Setup dialog box closes.
<For a description of this function, refer to page 2-22.>
• To exit the menu during operation, press ESC located
SELECT
above the soft keys.
• In the procedural explanation below, the term
jog shuttle & SELECT refers to the operation of
selecting/setting items and entering values using the
jog shuttle and SELECT and RESET keys. For details
on this operation, see sections 4.1 or 4.2.
• For a description of the operation using a USB keyboard
or a USB mouse, see section 4.3.
When the user-defined
computation option is installed
Select PS.
Select the waveform on which to perform computation.
Set the scaling used to display computed waveform
Math1 to Auto (auto scaling) or Manual (manual scaling).
If scaling is set to Manual, set the vertical center line level
on the screen (voltage value if set to voltage) and the
sensitivity (voltage per division if set to voltage).
Set the unit of computed waveform Math1.
Set the computation start point.
Select the number of computed points.
Select the time window.
IM 701450-01E
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