VTI Instruments EX1000A - Triggering System Overview

VTI Instruments Corp.
70 EX10xxA Triggering
SECTION 4
TRIGGERING
OVERVIEW
The EX10xxA supports a full function trigger model with a separate arm source and trigger source
event structure. The trigger model is based on the industry standard SCPI 1999 Trigger Subsystem
and is diagramed in Figure 4-2.
IDLE
IDLE
LAYER
ARM
LAYER
TRIG
LAYER
INIT
LAYER
DEVICE
LAYER
Init
Continuous?
No
Init
Yes
Wait for
ARM Event
ARM Delay
ARM Event
ARM:Count > 0
or
ARM:Count:Inf?
No
Yes
Software Arm
ARM:COUNT:INF?
Decrement
ARM:COUNT
No
Yes
TRIG:Count > 0
or
TRIG:Count:Inf?
No
Wait for
TRIG Event
TRIG Delay
TRIG Event
Software Trigger
TRIG:COUNT:INF?
Yes
Yes
RUN SCAN LIST
Decrement
TRIG:COUNT
No
FIGURE 4-2: EX10XXA TRIGGER MODEL