Rigol VS5000 Series User Manual page 79

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then stop.
3. Coupling:
Trigger coupling determines which signal component passed to the trigger circuit.
Coupling types include AC, DC, LF Reject and HF Reject.
AC: AC coupling blocks DC components.
DC: DC coupling passes both AC and DC components.
LF Reject: LF Reject coupling blocks DC component, and attenuates all signal
with a frequency lower than 8 kHz.
HF Reject: HF Reject coupling attenuates all signals with a frequency higher
than 150 kHz.
4. Pre-trigger/delayed trigger:
The data collected before and after trigger.
The trigger position is typically set at the horizontal center of the screen. In the
full-screen display 6 divisions' data of pre-trigger and delayed trigger can be
surveyed. More data (14div) of pre-trigger and 1s delayed trigger can be
surveyed by adjusting the horizontal scale and offset.
This feature is very useful to study the events that led up to the trigger point.
Everything to the right of the trigger point is called post-trigger information. The
amount of delay range (pre-trigger and post-trigger information) depends on the
sweep speed selected.
Adjustable trigger sensitivity
To avoid the influence of noise from the environment and get the stable trigger,
the trigger circuit has adopted stickiness. In VS5000 series, the stickiness is
adjustable from 0.1div-1.0div, which means when it sets to 1.0div, the trigger
circuit will not care any signal with peak-peak amplitude less than 1.0div, so as to
avoid the influence of the noise.
© 2008 RIGOL Technologies, Inc.
User's Guide for VS5000 Series
2-47