Instructions
4.Advanced User Guidebook 
89 
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 
cursors active. Select Line in the bottom menu as a or b, turn the M knob to 
move it. 
7.  In the bottom cursor menu, you can select  Window as Main  to make the 
cursors shown in the main window. 
How to Use Autoscale 
This is a very useful function for first time users to carry out a simple and quick test 
on the input signal. The function is applied to follow-up signals automatically even if 
the signals change  at any time. Autoscale enables the instrument to set up trigger 
mode, voltage division and time scale automatically according to the type, amplitude 
and frequency of the signals. 
The menu is as follows: 
Function Menu  Setting  Instruction 
Autoscale 
ON 
OFF 
Turn on 
Autoscale.
Turn off Autoscale. 
Mode 
Follow-up and adjust both vertical and horizontal 
settings. 
Follow-up and only adjust horizontal scale. 
Follow-up and only adjust vertical scale. 










