21
Hardcopy key
See Utility key (page30)
Help key
Turn help mode on/off
Help
Horizontal menu key
Select main (default) display
Main
Select window mode
Window TIME/DIV
Zoom in window mode
Window Zoom
Select window roll mode
Roll
Select XY mode
XY
DSO-4000 User Manual
22
Math key 1/2
Math on/off
Math
Select math operation type (+/–)
Operation
Select addition/subtraction
CH1+/-CH2
Set result position
Position VAR
Math result Volt/Div
Unit/Div VAR
Math key 2/2
Math on/off
Math
Select math operation type (FFT)
Operation
Select FFT source channel
Source
Select FFT window
Window
Select FFT result position
Position VAR
Select vertical scale
Unit/Div