4.Advanced User Guidebook
27
(1) Push the
CH1
button to show CH1 SETUP menu.
(2) Select
Limit
in the bottom menu.
(3) Select
Full
band
in the right menu. The high frequency of the signal will be
allowed to pass.
(4) Select
20M
in the right menu. The bandwidth is limited to 20 MHz. The
frequencies above 20MHz will be rejected.
6. To set input impedance
Setting the input impedance can reduce the circuit load caused by the interaction
between the oscilloscope and the circuit under test.
Taking CH1 as an example, the operation steps are as follows:
(1) Push the
CH1
button to show the CH1 SETUP menu.
(2) Select
Input IMP
in
the bottom menu. Press again to switch between 1MΩ
or 50Ω.
1MΩ
：
At this time, the input impedance of the oscilloscope is very high, and
the current flowing into the oscilloscope from the circuit under test is
negligible.
50Ω
：
Match the oscilloscope with the equipment with an output impedance
of 50Ω. The maximum input voltage cannot exceed 5 Vrms.
Use Mathematical Manipulation Function
The
Mathematical Manipulation
function is
used to show the results of the
addition, multiplication, division and subtraction operations between two channels,
the FFT operation for a channel, advanced math feature including Intg, Diff, Sqrt,
user defined function, and digital filter. Press the
Math
button to display the menu
on the bottom.
The
Waveform Calculation menu:
Function Menu
Setting
Description
Wavefor
m Math
Factor1
CH1
CH2
CH3
CH4
Select the signal source of the factor1
Sign
+ - * /
Select the sign of mathematical
manipulation
Factor2
CH1
CH2
CH3
CH4
Select the signal source of the factor2
Vertical
(div)
Turn the
M
knob to adjust the vertical position of the
Math waveform
