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2.8 Trigger System

The trigger determines when the oscilloscope starts to acquire data and display a

waveform. When a trigger is set up properly, the oscilloscope converts unstable displays

or blank screens into meaningful waveforms.

Here are three buttons and one Knob in the Trigger area. Showing as Picture.2-29:

Picture 2.8-1

■

“TRIG MENU” Button: Press the “TRIG MENU” Button to display the “Trigger Menu”.

■

“LEVEL” Knob: The LEVEL knob is to set the corresponding signal voltage of trigger

point in order to sample. Press the “LEVEL” knob can set trigger level to zero.

■

“SET TO 50％

％％

％” Button: Use the “SET TO 50%” button to stabilize a waveform quickly.

The oscilloscope can set the Trigger Level to be about halfway between the minimum

and maximum voltage levels automatically. This is useful when you connect a signal to

the EXT TRIG BNC and set the trigger source to Ext or Ext/5.

■

“FORCE” Button: Use the FORCE button to complete the current waveform

acquisition whether the oscilloscope detects a trigger or not. This is useful for SINGLE

acquisitions and Normal trigger mode.

■

Pre-trigger/Delayed trigger: The data 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 position.

The feature is very useful because you can see the events that led up the trigger point

everything to the right of the trigger point is called posttrigger information the amount of

delay range (pre-trigger and posttrigger information) available is dependent on the

LEVEL knob

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SIGLENT SDS1000D Bedienungsanleitung Seite 50