User manual

GDS-2000A Series User Manual
144
Trigger
The trigger configures the conditions for when the GDS-2000A
captures a waveform.
The following trigger overview only applies to the analog channels,
for triggering details using the optional logic analyzer module,
please see the GDS-2000A Options User Manual for details.
Trigger Type Overview
Edge
The edge trigger is the simplest trigger type. An
edge trigger triggers when the signal crosses an
amplitude threshold with either a positive or
negative slope.
Rising edge trigger
Falling edge trigger
Delay
The Delay trigger works in tandem with the edge
trigger, by waiting for a specified time or number
of events before the edge trigger starts. This
method allows pinpointing a location in a long
series of trigger events.
Note: when using the delay trigger, the edge trigger
source can be any one of the channel inputs, the EXT
input or the AC line.
Delay trigger example (by event)
1 2 3
A
B
C
D
A
Ext. trigger input
(Delay trigger)
B
Source (Edge trigger)
C
Delay event count (3)
D
First triggering point