Channel Coupling; Bandwidth Limit - Rigol 2000 Series User Manual

Chapter 2 To Set the Vertical System

Channel Coupling

The undesired signals can be filtered out by setting the coupling mode. For example,
the signal under test is a square waveform with DC offset.
When the coupling mode is "DC": the DC and AC components can pass the

channel.
When the coupling mode is "AC": the DC components of the signal under test

are blocked.
When the coupling mode is "GND": the DC and AC components of the signal

under test are both blocked.
Press CH1  Coupling and use
default is DC). The current coupling mode is displayed in the channel status label at
the bottom of the screen as shown in the figures below. You can also press
Coupling continuously to switch the coupling mode.
DC

Bandwidth Limit

Setting the bandwidth limit can reduce the display noise. For example, the signal
under test is a pulse with high frequency oscillation.
When bandwidth limit is disabled, the high frequency components of the signal

under test can pass the channel.
Enable bandwidth limit and limit the bandwidth to 20 MHz or 100 MHz

high frequency components that exceed 20 MHz or 100 MHz are attenuated.
Press CH1  BW Limit and use
default is OFF). When bandwidth limit (20 MHz or 100 MHz) is enabled, the character
"B" will be displayed in the channel status label at the bottom of the screen. You can
also press BW Limit continuously to switch the bandwidth limit status.
[1]
Note : Only the oscilloscope which analog bandwidth is 200 MHz or 300 MHz can limit the
bandwidth to 100 MHz.
MSO2000A/DS2000A User Guide
to select the desired coupling mode (the
AC
to enable or disable bandwidth limit (the
RIGOL
GND
[1]
, the
2-3