Chapter 2 Vertical Channel Settings; Open/ Active/ Cloase Analog Channel; Channel Coupling; Bandwidth Limitation - UNI-T UPO3000E Series User Manual

Chapter 2 Vertical Channel Settings

UPO3000E provides 4 or 2 analog input channels. The 4 analog channels
are CH1~CH4, and the 2 analog channels are CH1 and CH2. The vertical
system setting method for all channels are exactly the same.
This chapter uses 1 (Channel 1) as an example to describe the vertical
channel settings.
2.1 Open/Activate/Close Analog Channel
CH1 ~ CH4 contains 3 states: open, close, and activated.
Open: When the channel is close, press any of 1 , 2 , 3 , 4 to open the
corresponding channel.
Close: No waveform displays on the corresponding channel. For any open
and activated channel, pressing its channel button can close that channel.
Activated: When multiple channels are opened at the same time, only one
channel is activated (Only open state can be activated). Adjusting the
POSITION knob and the SCALE knob in the vertical control area can
change the settings of the activated channel. Any channel that has been
opened but not yet activated could be activated by pressing its corresponding
channel key, and the screen will show its corresponding channel menu.
Activated state

2.2 Channel Coupling

Press 1 coupling to select DC, AC or grounding mode.
DC
Open but not activated
AC Grounding

2.3 Bandwidth limitation

Press 1 bandwidth limitation to turn on the bandwidth limitation (The B
icon will appear on the vertical status bar). The bandwidth of the oscilloscope
is limited to about 20MHz, and attenuates any signal above 20MHz. It is
commonly used to reduce the high frequency noise within the signal.
B icon appears when the bandwidth limitation is on

2.4 VOLTS/DIV

Press 1 VOLTS/DIV coarse tuning/fine tuning. Or press the SCALE
knob to quickly switch between coarse tuning/fine tuning.
In the coarse tuning, the VOLTS/DIV range is 1mV/div~20V/div by 1-2-5 step.
For example: 10mV 20mV 50mV
In the fine tuning, it adjusts in 1% of the current vertical scale.
For example: 10.00mV 10.10mV
Note: Div indicates the grids of the display area, /div represents one grid.

2.5 Probe

In order to match the attenuation coefficient setting of the probe, it is necessary
to set the corresponding coefficient in the channel operation menu. If the
probe attenuation coefficient is 10:1, the probe coefficient in the channel
menu should also be set to 10X to ensure correct voltage reading.
Press 1 probe to select 0.001X, 0.01X, 0.1X, 1X, 10X, 100X, 1000X.
100mV
10.20mV 10.30mV
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