8-Advanced Function of Oscilloscope
65
components and the final frequency contains 1024 points ranging from 0Hz to Nyquist frequency.
The following table describes the FFT menu:
Function Menu
Setting
Instruction
FFT
ON
OFF
Turn on FFT function
Turn off FFT function
Window
Rectangle
Blackman
Hanning
Hamming
Select window for FFT.
Format
dB
Vrms
Set Vrms as vertical scale unit
Set dBVrms as vertical scale unit
Zoom
×
1
×
2
×
5
×
10
Set multiple
×
1
Set multiple
×
2
Set multiple
×
5
Set multiple
×
10
Taking the FFT operation for example, the operation steps are as follows:
1.
Press
MENU
key and the function menu appear on the right side of the screen.
2.
Press
MENU ▲
or
MENU ▼
key to select
FFT MODE
. Five items selectable are available
at the bottom of the screen.
3.
Press
F1
to set
ON
. The green waveform F is shown in the screen after calculation.
4.
Press
F2
to switch over
Window
including
Hamming, Rectangle, Blackman
and
Hanning
.
5.
Press
F3
to switch over Format
dB
and
Vrms.
6.
Press
F4
to
zoom in or out the waveform, the magnification includes
×
1,
×
2,
×
5,
×
10.
7.
Press
CHANNEL SETTING
(red)
,
One of the following three prompts circularly will show at the bottom-left of the screen
when the format is
dB
.
▲
/
▼
— CH Volts/Div
▲
/
▼
— FFT dB Scale