GW Instek GDS-2000A series Quick start guide for Logic analyzer option - Manual (Page 14)

Trigger Settings
The Logic Analyzer option adds Bus and Logic triggers
to the GDS-2000A.
Note that the digital channels can also be set as the
source for the traditional Edge and Pulse Width
triggers, but will not be covered here as the operation
is covered in the user manual.
Logic Trigger Settings
The digital channels can be set up to trigger on
specified logic levels and for a specified clock edge.
1. Press the trigger Menu key and select
Type > Others > Logic.
2. Press Define Inputs to set the digital logic to
trigger on.
 Only 1 bit can be set as the clock bit.
 The digital logic will be reflected in the
Trigger Status icon under the graticule.
3. Press When to configure the triggering conditions
for the logic that was defined in the Define Inputs
menu.
 The scope can be configured to trigger when
the defined logic is true or false.
 The trigger timing for when the selected
logic is true can also be configured.
4. Press Thresholds to set the thresholds.
 There are 5 pre-set threshold levels in