Rigol DS1000D Manuel d'utilisateur télécharger pdf (Page 82)

RIGOL

User’s Guide for DS1000E, DS1000D Series

2-52

previous waveform, if any, will remain on the display.

 Single: In Single mode, after pressing the RUN/STOP key, the oscilloscope

waits for trigger. While the trigger occurs, the oscilloscope acquires one

waveform then stop.

3. Coupling: Trigger coupling determines which signal component passing to the

trigger circuit. Coupling types include AC, DC, LF Reject and HF Reject.

 AC: AC coupling blocks DC components and attenuates the signal below 10Hz.

 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 the 6div data of pre-trigger and delayed trigger can be

surveyed. More data of pre-trigger and 1s delayed trigger can be surveyed by

adjusting the horizontal

knob.

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

delay range (pre-trigger and post-trigger information) depends on the sweep

speed selected.

5. Adjustable trigger sensitivity: To avoid the influence of noise from the

physical world, and get the stable trigger, the trigger circuit has adopted

Stickiness. In DS1000E, DS1000D series, the stickiness is adjustable from

0.1div-1.0div, which means when it sets to 1.0div, the trigger circuit will not

affect any signal with peak-peak amplitude less than 1.0div, so as to avoid the

influence of the noise.

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Rigol DS1000D Manuel d'utilisateur Page 82