4.Advanced User Guidebook
20
analyzing the input signal on Oscilloscope. You can match these frequencies with
known system frequencies, such as system clocks, oscillators, or power supplies.
FFT function in this oscilloscope transforms 2048 data points of the time-domain
signal into its frequency components mathematically (the record length should be
10K or above). The final frequency contains 1024 points ranging from 0Hz to
Nyquist frequency.
Press the
Math
button to display the menu on the right, select
Type
as
FFT
.
Function Menu
Setting
Description
Type
FFT
Display the FFT menu
Source
CH1
CH2
CH3
CH4
Select the FFT source.
Window
Hamming
Rectangle
Blackman
Hanning
Kaiser
Bartlett
Select window for FFT.
Format
Vrms
dB
Select Vrms for Format.
Select dB for Format.
Next Page
Enter next page
Hori (Hz)
frequency
frequency/di
v
Switch to select the horizontal
position or time base of the FFT
waveform, turn the
M
knob to adjust it
Vertical
div
V or dBVrms
Switch to select the vertical position or
voltage division of the FFT waveform,
turn the
M
knob to adjust it
Prev Page
Enter previous page
Taking the FFT operation for example, the operation steps are as follows:
1. Press the
Math
button to display the math menu in the right.
2. In the right menu, select
Type
as
FFT
.
3. In the right menu, select
Source
as
CH1
.
4. In the right menu, select
Window
. Select the proper window type in the left
menu.
5. In the right menu, select
Format
as
Vrms
or
dB
.
