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SDS2000X HD Series Digital Oscilloscope User Manual
i n t . s i g l e n t . c o m 1 0 7
Acq Start-- The initial position of holdoff is the first time point satisfying the trigger condition. In the
example above, each holdoff starts from the first rising edge of the pulse sequence.
Last Trig Time--The initial position of holdoff is the time of the last trigger. In the example above, the
last trigger position is at the second rising edge of the pulse sequence and the second holdoff starts
from that point.
Trigger Coupling
The coupling setting of a trigger is only valid when the trigger source is C1~C4, EXT, or EXT/5.
DC: All of 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 on medium to high-frequency signals. See the
datasheet for details of the cut-off frequency.
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