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SDS5000X Series Digital Oscilloscope User Manual
33 / 2 3 6 W W W. S I G L E N T. C O M
A. Trigger source
B. Trigger coupling
C. Trigger mode
D. Trigger level
E. Trigger type
F. Trigger slope
Trigger source
C1~C4: Analog channels
EXT: External trigger channel
EXT/5: 5x attenuation of external trigger channel
AC Line: AC mains supply
D0~D15: Digital channels
Trigger coupling: Coupling mode of the current trigger source. It is only valid
when the trigger source is C1~C4, EXT or EXT/5.
DC：All the signal’s frequency components are coupled to the trigger
circuit for high frequency bursts or where the use of AC coupling would
shift the effective trigger level.
AC：The signal is capacitively coupled. DC levels are rejected. See the
datasheet for details of the cut-off frequency.
HFR： Signals are DC coupled to the trigger circuit, and a low-pass filter
network attenuates high frequencies (used for triggering on low
frequencies). See the datasheet for details of the cut-off frequency.
LFR：The signal is coupled through a capacitive high-pass filter network,
DC is rejected and low frequencies are attenuated. For stable triggering
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