Hantek 1060 User Manual page 30

CH1
Source
CH2
Rectangle
Hanning
Window
Hamming
Blackman
1/2
2/2
Vrms
Scale
dBVrms
Full
Display
Split
2/2
Note:
1. Signals that have a DC component or offset can cause incorrect FFT waveform
component magnitude values. To minimize the DC component, choose AC Coupling on
the source signal.
2. To reduce random noise and aliases components in repetitive or single-shot events,
set the oscilloscope acquisition mode to average.
3. To display FFT waveforms with a large dynamic range, use the "dBVrms" scale. The
"dBVrms" scale displays component magnitudes using a log scale.
FFT Window
The scope meter provides four FFT windows. Each window is a trade-off between
frequency resolution and amplitude accuracy. It depends on the desired measurement
and the source signals characteristics to determine the window to use.
Use the following guidelines to select the best window.
The FFT Window table
Window
Rectangle
Features
Best frequency resolution and
worst magnitude resolution.This
is essentially the same as no
window.
Define CH1 or CH2 as FFT source
Select window for FFT
Go to the next menu page
Back to the previous menu page
Set "Vrms" as vertical unit
Set "dBVrms" as vertical unit
Display waveform in full screen
Display waveform in split screen
Back to the previous menu page
Transients or bursts, the signal
levels before and after the
event are nearly equal.Equal-
amplitude sine waves with fixed
frequencies. Broadband random
noise with a relatively slow
varying spectrum.
2
Best for measuring