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SDS6000A Series Digital Oscilloscope User Manual
int.siglent.com 73
Coupling
DC: All of the input signal frequency components are passed to the display.
AC: The signal is capacitively coupled. DC signal components are rejected.
See the datasheet for details of the cut-off frequency.AC coupling is
suitable for observing AC signals with DC offset, such as power ripple.
GND: The channel is grounded by an internal switch. GND coupling is used
to observe the zero offset error of the analog channels or determine the
source of noise in the waveform (from signal or from oscilloscope itself)
Bandwidth Limit
Full bandwidth passes through signals with high-frequency components, but it
also means that noise with high-frequency components can pass through.
When the frequency component of the signal is very low, better signal-to-
noise ratios (SNR) can be obtained by turning on a bandwidth limit. The
SDS6000A provides two hardware bandwidth limit options: 20 MHz and 200
MHz.
Probe Attenuation
The SDS6000A provides 1X, 10X, 100X, and custom probe attenuation factor
options. The custom values can be between 10
-6
~10
6
. The oscilloscope will
automatically convert the vertical scale according to the current probe
attenuation factor. For example, the vertical scale of the oscilloscope under 1X
attenuation is 100 mV/div, and the vertical scale will be automatically set to 1
V/div if the probe attenuation is changed to 10X. If a standard probe with a
readout terminal is connected, the oscilloscope will automatically set the probe
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