Instructions

4.Advanced User Guidebook
84
In FFT mode, push the Cursor button to turn cursors on and display the cursor menu.
The description of the cursor menu in FFT mode is shown as the following table:
Function
Menu
Setting Description
Type
Vamp (or Phase)
Display the Vamp (or Phase) measurement
cursor and menu.
Freq
Display the Freq measurement cursor and menu.
Freq&Vamp
(or Freq&Phase)
Display the corresponding measurement cursor
and menu.
AutoCursr
The horizontal cursors are set as the intersections
of the vertical cursors and the waveform
Line Type
(Freq&Vamp
or
Freq&Phase
type)
Freq Makes the vertical cursors active.
Vamp (or Phase) Makes the horizontal cursors active.
Window
(Wave zoom
mode)
Main
Extension
Measure in the main window.
Measure in the FFT extension window.
Line
a
Turn the M knob to move line a.
b
Turn the M knob to move line b.
ab
Two cursors are linked. Turn the M knob to
move the pair of cursors.
Source Math FFT
Display the channel to which the cursor
measurement will be applied.
Perform the following operation steps for the amplitude and frequency cursor
measurement of math FFT:
1. Press the Math button to display the math menu in the bottom. Select FFT.
In the right menu, select Format. In the left menu, turn the M knob to select
amplitude unit (V RMS or Decibels).
2. Push Cursor to display the cursor menu.
3. In the bottom menu, select Window as Extension.
4. Select the first menu item in the bottom menu, the Type menu will display at
the right of the screen. In the right menu, select Freq&Vamp for Type, two
blue dotted lines displayed along the horizontal direction of the screen, two
blue dotted lines displayed along the vertical direction of the screen. Cursor
measure window at the left bottom of the screen shows the cursor readout.
5. In the bottom menu, select Line Type as Freq to make the vertical cursors
active. If the Line in the bottom menu is select as a, turn the M knob to move
line a to the right or left. If b is selected, turn the M knob to move line b.
6. In the bottom menu, select Line Type as Vamp to make the horizontal