VTI Instruments EX1629 - Section 4 Triggering; Overview

www.vtiinstruments.com
EX1629 Triggering 63
SECTION 4
TRIGGERING
OVERVIEW
The EX1629 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 4-1.
IDLE
IDLE
LAYER
ARM
LAYER
TRIG
LAYER
INIT
LAYER
DEVICE
LAYER
Init
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
Decrement
TRIG:COUNT
No
Sample Count
Done?
No
Decrement
Sample Count
Yes
Acquire
Data
FIGURE 4-1: EX1629 TRIGGER MODEL