(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:
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