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5.1 Turn on/off/Activate/ Analog Channel
CH1~CH2 contains three states: turn on, shut down and activate
① Turn on：Press to turn off any of 1, 2 key can turn on the corresponding channel.
② Shut down：In this state, it will not show waveform. Press the corresponding channel key to turn off
which has been activated.
③ Activation：When multiple channel are enabled, only one channel can be activated (should be in
open state). In the active state，vertical scale, vertical displacement and channel setting can be
adjusted. Any of the channels that have been opened but not activated could be activated by the
corresponding channel keys.
Activation state Open but not activated Shut down
5.2 Channel Coupling
Channel coupling has three mode direct current, alternating current and ground coupling.
Direct Current AC Current Ground
5.3 Bandwidth Limitation
The bandwidth limit can set to 20 MHz and full bandwidth, soft key menu set to 20 MHz. The bandwidth
of the oscilloscope is limited to about 20 MHz and the high frequency signal above 20MHz in the
attenuation signal. It is often used to observe high frequency noise when low frequency signals is reducing.
When the bandwidth limit function is turned on, the B icon will appear in the vertical state, as shown in
Figure below.
B Icon
5.4 Volts/div
Press vertical scale knob can switch to volts/div quickly, it divided into coarse and fine adjustments. The
volts/div is from 1mV/div ~ 20V/div, with 1 -2- 5 order. In the coarse adjustment, it adjusts the vertical unit
by normal order; in fine adjustment, it adjusts the current vertical position by stepped 1%.
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